Soil Vapor Investigation Report: Greenpoint, Brooklyn

Transcripción

February 6,2006
SOIL VAPOR INVESTIGATION
REPORT
Greenpoint, Brooklyn, New York
Prepared for
EXXONMOBIL REFINING AND SUPPLY COMPANY
464 Doughty Boulevard
Inwood, New York 11096
ROUX ASSOCIATES, INC.
Environmental Consulting & Management
209 Shafter Street, Islandia, New York 11749 ♦ 631-232-2600
MC17230Y16.706R/CV
DRAFT
TABLE OF CONTENTS
1.0 INTRODUCTION ....................................................................................................................1
2.0 SITE BACKGROUND.............................................................................................................3
2.1 Land Use .............................................................................................................................3
2.2 Results of Previous Investigations and Remediation Activities .........................................4
2.2.1 Free Product Occurrence and Extent .........................................................................4
2.2.2 Soil Vapor Conditions................................................................................................5
3.0 INVESTIGATION ACTIVITIES.............................................................................................7
3.1 Land Use Review................................................................................................................7
3.2 Phase I Field Investigation Activities .................................................................................7
3.2.1 CPT-MIP Soil Boring Program .................................................................................8
3.2.2 Discrete Soil Vapor Sample Collection ...................................................................10
3.2.3 Ambient Air Sample Collection...............................................................................12
3.2.4 Gauging of Monitoring Wells..................................................................................12
3.3 Phase II Activities .............................................................................................................12
3.3.1 Confirmatory Discrete Soil Vapor Sampling...........................................................12
3.3.2 Discrete Soil Vapor Sample Collection ...................................................................14
3.3.3 Ambient Air Sample Collection...............................................................................15
4.0 SOIL VAPOR INVESTIGATION RESULTS.......................................................................16
4.1 Land Use Survey Results ..................................................................................................16
4.2 Overview of Soil Vapor Investigation Results .................................................................17
4.3 Development of Site-Specific Soil Vapor Screening Criteria ..........................................20
4.3.1 Sub-slab Attenuation Factors...................................................................................20
4.3.2 Indoor Air Quality Criteria ......................................................................................21
4.3.3 Calculation of Screening Criteria.............................................................................23
4.4 Evaluation of Analytical Results in the Residential Area.................................................23
4.5 Evaluation of Analytical Results in the Commercial Area...............................................24
4.6 Chlorinated Solvent Concentrations .................................................................................24
5.0 CONCLUSIONS AND RECOMMENDATIONS .................................................................26
6.0 REFERENCES .......................................................................................................................29
TABLES
1.
2.
3.
4.
5.
6.
7.
8.
Soil Boring Data, Off-Site Soil Vapor Investigation
Summary of Regional Aquifer Water-Level and Free-Product Thickness Data
Borehole Screening Data
Borehole Screening Data for Soil Investigation
Tracer Gas Data for Soil Vapor Investigation
Summary of Benzene in Soil Vapor and Ambient Air Data
Summary of Methane in Soil Vapor and Ambient Air Data
Summary of Analytical Air Data
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TABLE OF CONTENTS
(Continued)
FIGURES
1.
2.
3.
4.
5.
6.
7.
8.
Site Plan
Site Plan – Current Plume Extent
Land Use Within Study Area
Buildings With Sub-Grade Structures Within The Study Area
Vadose Zone Attenuation for Benzene
Vadose Zone Attenuation for Methane Concentrations
Summary of Benzene in Soil Vapor
Summary of Methane in Soil Vapor
APPENDICES
A.
B.
C.
D.
E.
CPT-UVIF Soil Boring Logs
Science Applications International Corporation, August 2005 Report
Results of Electronic Database Review
MIP Soil Boring Logs
Soil Vapor Sampling Forms
PLATES
1. Generalized Hydrogeologic Cross-Section Lines
2. Generalized Hydrogeologic Cross-Section A-A’
3. Generalized Hydrogeologic Cross-Section B-B’
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1.0 INTRODUCTION
This report presents a summary of activities performed by Roux Associates, Inc. (Roux Associates)
on behalf of ExxonMobil Refining and Supply Company (ExxonMobil) for the investigation of soil
vapor in Greenpoint, Brooklyn, New York. This investigation specifically deals with soil vapor
present in the vadose zone above and in the vicinity of the portion of the free-product plume (OffSite Plume) located south and southeast of the former Mobil Brooklyn Refinery/current British
Petroleum (BP) Terminal (Off-Site Area). The area of investigation (Study Area) is shown in
Figure 1. The work was performed in accordance with the scope of work letters dated August 4 and
September 15, 2005, both of which were submitted to the New York State Department of
Environmental Conservation (NYSDEC). As stated in the scope of work dated August 4, 2005, the
primary objective of the investigation was to provide a greater understanding of the soil vapor
conditions present throughout the Off-Site Area and how they are related to the Off-Site Plume.
Based upon this objective, the scope of work was designed to generate data required to:
•
Evaluate the extent of petroleum-related soil vapor and its relationship to the free-product
plume;
•
Identify possible geologic barriers which restrict or influence the migration of soil vapor, if
any; and
•
Allow identification of potential exposure concerns to determine if additional actions are
required.
In order to accomplish these objectives, the soil vapor investigation included the following
activities:
•
Land use review;
•
Implementation of a cone penetrometer testing (CPT) soil boring program utilizing a
membrane interface probe (MIP);
•
Collection and analysis of discrete soil vapor samples at multiple depths below land surface
throughout the Study Area;
•
Collection of ambient air samples and monitoring of meteorological conditions to establish
baseline criteria; and
•
Completion of a gauging survey, including measurement of water levels and free-product
thicknesses in the Study Area monitoring wells.
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The data developed from each of these tasks were then evaluated to define the hydrogeologic
conditions, the nature and extent of contaminated soil vapor, and potential soil vapor exposure
concerns within the Study Area.
All of the field tasks were completed in accordance with Roux Associates’ Standard Operating
Procedures (SOPs) and health and safety protocols, as well as ExxonMobil’s Operations Integrity
Management System (OIMS). In addition, applicable elements of the New York State Department
of Health (NYSDOH) Draft Guidance for Evaluating Soil Vapor Intrusion in the State of New York
(NYSDOH Draft Guidance) (February 2005) were followed.
The remainder of this report is separated into the following sections:
•
Section 2.0 contains background information on the Study Area;
•
Section 3.0 contains detailed descriptions of the field activities performed in completing the
investigation scope of work;
•
Section 4.0 presents the results of the investigation; and
•
Section 5.0 summarizes the key findings and conclusions of the investigation and presents
recommendations for additional work.
Tables, figures, plates, and appendices documenting and summarizing the investigation are attached
at the end of the report. The appendices include: CPT-UVIF Soil Boring Logs (Appendix A),
Science Applications International Corporation, August 2005 Report (Appendix B), Results of
Electronic Database Review (Appendix C), MIP Soil Boring Logs (Appendix D), and Soil Vapor
Sampling Forms (Appendix E).
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2.0 SITE BACKGROUND
The Study Area is located in Greenpoint, the northernmost section of the Borough of Brooklyn,
New York City, New York (Figure 1). The Study Area is an urban area approximately one-quarter
of a square mile in size, consisting of industrial and residential areas, bordered on the northeast by
Newtown Creek, an active waterway that is a tributary of the East River. Topographic elevations
(i.e., land surface) are approximately six feet above mean sea level (amsl) along the bulkhead along
Newtown Creek, and rise gradually to approximately 50 feet amsl in the southwest portion of the
Study Area. The Brooklyn-Queens Expressway (BQE) is an elevated highway that passes through
the southern portion of the Study Area. Boundaries of the Study Area are the BP Terminal to the
north, Newtown Creek to the east, Lombardy and Beadel Streets to the south, and Kingsland
Avenue to the west (Figure 1).
2.1 Land Use
Land use to the north of Nassau Avenue and east of Van Dam Street is strictly commercial and
industrial. The southwestern portion of the Study Area is a residential area. The residential area
extends from Van Dam Street, between Nassau and Meeker Avenues, to the western Study Area
boundary.
The Study Area is part of the overall region of historic petroleum refining and storage operations
that occupied a significant portion of the Greenpoint area since the mid-Nineteenth Century.
Petroleum refining within the Greenpoint area began in approximately 1867 and by 1870, over
50 refineries were located along the banks of Newtown Creek. Bulk oil storage terminals still exist
north of the Study Area, including the BP Terminal adjacent to the northern boundary of the Study
Area and the ExxonMobil Brooklyn Terminal (Brooklyn Terminal), which is adjacent to and north
of the BP Terminal.
Within the Study Area, the former Paragon Oil facility was located north of Bridgewater Street,
between Meeker Avenue and Apollo Street. Paragon Oil also owned land south of Bridgewater
Street, between Varick Street and Apollo Street, that was predominantly used for storage of the
tanker trucks utilized for offloading petroleum products from the Paragon Oil terminal (Figure 1).
Peerless Importers, Inc. (Peerless Importers), a large distributor of spirits, currently owns a large
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parcel of land along Newtown Creek that was the portion of the former Paragon Oil facility north of
Bridgewater Street.
Waste transfer operations currently predominate to the east of Gardner Avenue. Keyspan, formerly
Brooklyn Union Gas Company, operates a large storage terminal located southeast of the Study
Area (Figure 1).
2.2 Results of Previous Investigations and Remediation Activities
The free-product plume beneath the Study Area has been the subject of several investigations and
ongoing remediation activities since 1978. The scope and results of these activities have been
documented in numerous reports submitted to the NYSDEC. The focus of these investigations
included the determination of free-product plume extent, volume, and migration characteristics, as
well as hydrogeologic conditions.
Key findings from these investigations and remediation
activities, as they relate to the current soil vapor investigation, are provided below.
2.2.1 Free Product Occurrence and Extent
In September 1978, the USCG determined that oil was seeping into Newtown Creek from the
bulkhead located at the northern terminus of Meeker Avenue (Figure1). An investigation was
subsequently performed within the surrounding area to determine the extent and source of the oil
seepage.
The extent of free-product delineated during the 1979 investigation encompassed
approximately 52 acres. The property currently occupied by the BP Terminal was determined to be
the source area, where maximum apparent free-product thickness exceeded 10 feet (Geraghty and
Miller, 1979).
Subsequent investigation and remediation activities conducted by Roux Associates on behalf of
ExxonMobil from 1990 to present have further defined the areal extent of the Off-Site Plume and
the hydrogeological conditions that affect its migration. The extent of the plume in 1990 was very
similar to that determined by the investigations conducted on behalf of the USCG in 1979
(Roux Associates, 1991). The current plume extent is less than it was in 1990 due to the operation
of the Off-Site Free Product Recovery System. This system, which is still operational, was installed
in 1995 and has resulted in the recovery of approximately 3,530,000 gallons of separate phase
product from the Study Area (the Off-Site Plume).
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A fine-grained, low permeability layer has been identified throughout the Study Area ranging in
thickness from two to over six feet. This layer was observed during the completion of monitoring
wells and soil borings during previous investigations at multiple locations and confirmed with the
CPT soil borings data completed during this investigation (Appendix A). This fine-grained layer
has been identified in previous investigations (Roux, 2003 & 2004) and is considered relatively
continuous throughout the Study Area with exceptions in the northeast portion of the Study Area
between Nassau Avenue and Bridgewater Street. Additional information regarding this layer is
detailed in Section 4.2. Prior to the performance of the soil vapor investigation, it was postulated
that this low permeability layer might have an effect on the migration and attenuation of soil vapor
as it migrates vertically through the vadose zone above the free-product plume. It has been
demonstrated that low-permeability layers have the potential to be confining layers restricting the
migration of soil vapor.
Groundwater flow in the Study Area under static conditions is generally towards Newtown Creek.
Flow from the southern portion of the Off-Site Area is initially north, then east toward the creek.
Groundwater flow from the western portion of the Off-Site Area is primarily east towards the creek.
The resultant direction of groundwater flow as it approaches Newtown Creek appears to be focused
east towards Newtown Creek. Localized cones of groundwater depression are present in the
vicinity of the Off-Site System recovery wells during normal Off-Site System operation.
2.2.2 Soil Vapor Conditions
Prior to this investigation, there were limited data regarding the soil vapor conditions within the
Study Area. However, with the exception of one circumstance when a residential homeowner did
not properly grout a boring that was completed 50 feet below grade through the low permeability
layer, there have been no documented odor complaints to the NYSDEC that would be indicative of
a soil vapor intrusion problem within the Study Area. Moreover, periodic monitoring of the sewer
manholes within the Study Area has not revealed the presence of a soil vapor migration problem.
As part of an ongoing remedial investigation at the Peerless Importers property, Science
Applications International Corporation (SAIC) on behalf of Chevron Environmental Management
Company (Chevron) submitted a summary of soil vapor monitoring activities to the NYSDEC on
August 29, 2005 (Appendix B). These activities were completed as part of health and safety air
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monitoring. The sampling included both sub-slab soil vapor samples, as well as indoor air samples
above the slab. As a result, this data can be used to provide site specific empirical data with regards
to soil vapor attenuation factors. This data is discussed along with the current soil investigation
results in subsequent sections of this report.
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3.0 INVESTIGATION ACTIVITIES
The investigation activities included a land use survey, completion of CPT-MIP borings and
collection and analysis of discrete soil vapor and ambient air samples. The field investigation tasks
performed by Roux Associates were completed in two phases. Phase I consisted of the CPT-MIP
soil boring program; monitoring well gauging; collection and analysis of discrete soil vapor samples
collected at various depths; and the collection and analysis of an ambient air sample. Phase II
consisted of collection and analysis of discrete shallow subsurface soil vapor samples and ambient
air samples. The scope of work is summarized below.
3.1 Land Use Review
The land use review was performed to determine and/or confirm the following:
•
The boundaries of the residential and industrial areas;
•
The types of building construction present in these areas (i.e., slab-on-grade or buildings
with basements);
•
Types of heating methods employed at the buildings (i.e., oil or gas); and
•
The location of current or historical industrial operations or documented release areas that
may have potentially impacted soil vapor conditions in the Study Area.
In order to accomplish the objectives, the land use review included:
•
Visual inspection exteriors of buildings in the Study Area as observed from the public right
of way;
•
Limited door-to-door surveys with occupants of buildings in select portions of the Study
Area to inquire about the details of building construction; and
•
Review of historical Sanborn Maps and EDR Reports for the Study Area that summarize
information contained in environmental regulatory records databases (Appendix C).
3.2 Phase I Field Investigation Activities
The field activities performed during Phase I of the investigation were completed from August 15 to
August 19, 2005 and consisted of the completion of five CPT-MIP soil borings; the collection of
discrete soil vapor samples at each of these locations at multiple depths; the collection of one
ambient air sample; and a complete gauging round of monitoring wells within the Study Area and
surrounding areas.
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3.2.1 CPT-MIP Soil Boring Program
A total of five CPT soil borings (SG-1 through SG-5) were completed between August 15 and
August 16, 2005. The CPT borings were performed by ConeTec, Inc. of West Berlin, New Jersey,
under the supervision of Roux Associates’ project staff. The borings were completed using a 25-ton
direct-push truck-mounted unit capable of collecting standard CPT parameters (i.e., tip pressure,
sleeve friction, pore pressure, etc.), while utilizing Ultraviolet Induced-Fluorescence (UVIF)
technology to estimate the intensity of hydrocarbon contamination. An overview of the CPT
equipment, operation, and capabilities, as well as a description of the program, is provided below.
In addition, an MIP was incorporated into the drill string and was operated by Columbia
Technologies, of Baltimore, Maryland, also under the supervision of Roux Associates’ project staff.
The CPT apparatus determines soil types in the borehole through measurements of both tip
resistance and sleeve friction as the CPT probe is advanced into the ground. These measurements
are automatically recorded by CPT software as the borings are advanced. The software uses the
data to develop detailed lithologic descriptions of the borehole by comparing the measured
parameters to an extensive database of parameters for various known soil types.
The CPT lithologic descriptions were compared with those derived from corresponding well
installations. There was a good correlation between the two; however, the CPT software has some
limitations. During this and past investigations, it was observed that the CPT technology is only
capable of defining natural soil types (Roux Associates, 2003). Thus, when fill materials were
encountered in the borehole, the CPT would classify them as silts or silty sands. Areas of fill were
found to generally correspond to areas on the CPT logs where the lithology changed frequently
(about every foot) over depth. All soil types are shown on CPT logs in Appendix A.
The UVIF technology uses a sensor deployed by CPT equipment capable of characterizing
petroleum hydrocarbons in soils. High intensity ultraviolet light is projected through a sapphire
window in the side of the CPT probe. The ultraviolet light causes petroleum hydrocarbons in the
soil to emit fluorescence, the magnitude of which is subsequently measured by an on-board detector
and then transmitted to a data recorder. Because fluorescence intensity is proportional to petroleum
hydrocarbon concentration, this technology was able to effectively delineate the presence and
vertical extent of petroleum-impacted soil in the borehole. The fluorescence intensities (returns)
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measured by the UVIF module is measured in volts. Returns that remained within the measurable
range of the module are referred to as on-scale returns, while returns that exceeded the measurable
range of the module are referred to as off-scale returns.
It is important to note that these
fluorescence returns are relative to the specific type of product and degree of saturation of freeproduct present. Therefore, on-scale and off-scale returns are not necessarily indicative of the
mobility of the petroleum hydrocarbons observed in the formation.
The MIP technology is a screening tool that provides qualitative results for use in soil profiling. It
uses a sensor deployed in conjunction with the above-described CPT equipment and is capable of
screening for volatile hydrocarbons in the subsurface. The MIP is a down hole tool that heats the
soils and groundwater adjacent to the probe to 120 degrees Celsius. This increases volatility and the
vapor phase diffuses across a membrane into a closed, inert gas loop that carries these vapors to a
series of detectors housed at the surface. The gas stream is then analyzed with multiple detectors,
including a photo-ionization detector (PID) that is used to detect petroleum hydrocarbons and a
flame ionization detector (FID) that is used to detect methane, in addition to petroleum
hydrocarbons. Continuous contaminant logs or profiles are generated from each hole, which will
allow a relative comparison of the levels of volatile hydrocarbons present, but not specific
quantitative analytical results. All MIP results are presented in Appendix D.
In accordance with ExxonMobil pre-drilling protocols, soils were excavated at all proposed
locations from the 0 to 5-foot interval using an approved method (i.e., non-intrusive VactronTM
technology, posthole digger, air knife, etc.) before intrusive activities began. Utility clearance soil
excavations were performed by Aquifer Drilling and Testing Inc. of New Hyde Park, New York
(ADT), under Roux Associates’ direction. Proposed CPT boring locations were relocated if a utility
or significant obstruction was encountered in the subsurface.
With the exception of the interval between land surface and five feet below land surface (i.e., 0 to 5
feet), the CPT soil borings were driven continuously to a maximum depth of approximately 10 feet
beneath the water-table, to define the vertical extent of separate-phase and residual hydrocarbons.
In locations where petroleum-impacted soil appeared to extend deeper, as interpreted from the CPTUVIF data, the CPT boring was advanced until the cone was approximately 10 feet below the lower
boundary of petroleum-impacted soil. Total depths reached by the CPT probe ranged from 44.62 to
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64.96 feet below land surface. Upon completion, each of the CPT boreholes was grouted using
bentonite grout slurry.
The groundwater level at each CPT soil boring location was estimated through the interpretation of
real-time pore-pressure dissipation data collected as the CPT probe was driven to depth. These
values represent estimates of the hydraulic head in the borehole above the probe tip due to the
presence of both water and free-product and can be used to provide a general indicator of the
groundwater elevation at the boring.
Following CPT field activities, all soil boring locations were surveyed by Angle of Attack Land
Surveying, LLC of New York. All horizontal coordinates were measured in feet relative to the New
York State Plane Coordinates System, Long Island Zone, North American Datum of 1983
(NAD 83). All vertical coordinates (elevations) were measured in feet relative to the National
Geodetic Vertical Datum of 1929 (NGVD 29). These coordinates are shown in Table 1.
3.2.2 Discrete Soil Vapor Sample Collection
A total of 16 discrete soil vapor samples were collected during Phase I of the investigation between
August 17 and August 19, 2005. Depths for discrete soil vapor sampling were determined based on
the results of the CPT-MIP survey. A minimum of two discrete soil vapor samples were collected
immediately adjacent to each of the previously completed and grouted CPT soil boring locations.
One sample was collected at a depth of 7 to 8 feet below land surface (ft bls) and a second sample
was collected at a depth of 18 ft bls at each location. Additional deeper soil vapor samples were
collected at locations where the topographic elevation was greater and, hence, the depth to the freeproduct was greater. The depths of the additional discrete soil vapor samples were 24, 30 and 40 ft
bls. Soil vapor samples were collected in accordance with NYSDOH Draft Guidance (February
2005).
All borings were completed using a Geoprobe® to the target depth. Once the target depth was
achieved, the rods were pulled up to expose the void space and the sampling apparatus was set up in
the borehole. A sample illustration is provided in Appendix E. Soil vapor sampling was then
performed utilizing the following procedural steps:
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1. New Teflon-lined tubing equipped with a threaded stainless steel fitting was attached to the
bottom of the sampling rods, directly above a disposable soil vapor drive point.
2. A clay seal was then placed at land surface in the annular space between the Geoprobe® rods
and the concrete surface, as well as between the tip of the rods and the sample tubing to
prevent infiltration of the atmospheric air present at land surface directly above the soil
boring.
3. The sampling tubing was connected to a ‘T’ connector three-way valve assembly, with one
end of the ‘T’ connector leading to a vacuum pump and the other end leading to a preevacuated six-liter summa canister with regulators calibrated to collect a sample at a rate
less than 0.2 liters per minute.
4. The soil vapor sample tubing was then purged of approximately three volumes of the sample
tubing using a vacuum pump set at a rate of approximately 0.2 liters per minute.
5. A tracer gas (i.e. helium) was then used to enrich the atmosphere in the immediate vicinity
of the sampling location where the sampling tubing intersects the ground surface in order to
test the borehole seal and verify that ambient air is not inadvertently drawn into the sample.
The tracer gas identified above is used to verify that the ambient air does not dilute the soil
vapor sample being collected. A plastic container (i.e., bucket) was placed over the boring
with a soft seal and the helium was injected into the bucket to enrich the interior of the
bucket with the tracer gas. A tedlar sampling bag was then attached to the pump and filled
with the purge vapor as the tracer gas was added to the bucket. Both the purge volume from
the sample tubing and the helium-enriched area within the bucket was screened for the tracer
gas. The tracer gas was measured utilizing a Gas Check 3000 meter, which measures the
rate of the helium leakage at land surface. If the screening results showed that the rate of
helium detected in the sampling tubing was greater than 20 percent of the helium detected in
the enriched area (i.e., within the bucket), the seals around the sampling equipment were
reset and the sample rods were purged again until the tracer gas was no longer detected at
levels greater than 20 percent of the enriched area located directly above the borehole.
6. Following the purging and tracer gas verification steps, the valve leading to the pump was
closed, the pump was turned off, and the soil vapor was directed to the summa canister for
sample collection. The summa canister regulator restricted the sample collection rate to
0.2 liters per minute or less.
7. Once the sample was collected, the soil vapor was screened with several gas meters for
VOCs, oxygen, lower explosive limit (LEL), hydrogen sulfide (H2S) and carbon monoxide
(CO) to assist in determining soil vapor and natural attenuation conditions. These screening
concentrations were measured using a multi-gas detector calibrated daily with a 100 parts
per million (ppm) isobutylene standard and an appropriate multi-gas standard.
8. Upon completion of the sample collection and screening steps, each soil boring was tremie
grouted to land surface to prevent preferential pathways for soil vapors.
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All soil vapor air samples were analyzed for VOCs using United States Environmental Protection
Agency (USEPA) Method TO-15 and for methane using USEPA Method TO-3.
3.2.3 Ambient Air Sample Collection
One ambient air sample was collected during Phase I at land surface on August 18, 2005 at the
intersection of Norman Avenue and Apollo Street, which is in the vicinity of SG-1. The ambient air
sample was collected to better define the background atmospheric conditions within this area. The
air sample was analyzed for volatile organics using USEPA Method TO-15 and for methane using
USEPA Method TO-3.
3.2.4 Gauging of Monitoring Wells
All existing monitoring wells within the Study Area and the surrounding areas were gauged for
free-product thickness and water-table elevation on August 15, 2005 (Table 2). All measurements
were collected utilizing a sonic interface probe. Groundwater elevations have been corrected,
where necessary, for the presence of free-product. These measurements were used to determine the
current extent of the free-product plume as illustrated in Figure 2.
3.3 Phase II Activities
The field activities performed during Phase II of the investigation were completed from August 26
to September 27, 2005. The Phase II field activities included:
1. Confirmatory discrete soil vapor sampling adjacent to select Phase I investigation locations;
2. Additional discrete soil vapor sampling at locations throughout the Off-Site Area to expand
the area delineated during Phase I; and
3. Background discrete soil vapor sampling at locations outside the borders of the Off-Site
Plume to characterize regional shallow soil vapor concentrations.
3.3.1 Confirmatory Discrete Soil Vapor Sampling
The primary objective of the confirmatory discrete soil vapor sampling was to investigate whether
the soil vapor samples collected during the week of August 15 were affected by CPT-MIP borings
that were completed prior to, and in close proximity to, the original soil vapor sampling locations
(i.e., SG-1 through SG-5). Specifically, analytical data for SG-5 for the 8-foot sample interval
showed a benzene concentration of 2,340 parts per billion by volume (ppbv), which was
significantly higher than expected based upon the depth to product in this area.
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It should be noted that the CPT-MIP borings were driven beneath the free-product layer and it is
likely that minor amounts of product were smeared on the side of the CPT-MIP borehole during the
removal of the CPT-MIP rods. Therefore, the soil vapor samples collected immediately adjacent to
the CPT-MIP borehole (i.e., within 10 inches), could potentially be impacted by the residual free
product smeared on the sides of the borehole. This residual free product could provide a very small
isolated source in close proximity to the shallow soil vapor sampling location, even though the
borehole was tremie grouted to eliminate a preferential pathway. Based upon the recognition of this
potential for generating positively biased sampling results, the methodology that was utilized during
the Phase I activities (i.e. performing CPT-MIP borings prior to collecting soil vapor samples in an
immediately adjacent borehole within the same utility clearance location) was discontinued during
the subsequent phases of the investigation.
To investigate whether the SG-5 results had been biased due to the CPT-MIP borings, three discrete
soil vapor samples were collected at the 8-foot depth interval at three additional locations in close
proximity to SG-5 (locations SG-8, SG-13 and SG-17, Figure 7). The benzene concentrations at the
three confirmatory locations ranged from 3.7 to 30 ppbv, as compared to the 2,340 ppbv detected at
SG-5. Soil borings SG-8 and SG-17 were located approximately 100 feet away and SG-13 was
located approximately 15 feet away. Therefore, the soil vapor conditions present at SG-8 and SG17 were considered to be relatively similar to that of SG-5 prior to the cross-contamination, and the
soil vapor conditions sampled at SG-13 were considered almost identical. The closest sampling
point location to SG-5 was SG-13 where the benzene concentration was 3.7 ppbv, which is three
orders of magnitude less than was observed in SG-5. These findings indicate that the CPT boring
initially performed at location SG-5 had positively biased the subsequent soil vapor sampling results
at this location. Therefore, the data for the shallow sample at SG-5 was not included in the
subsequent evaluations of the soil vapor sampling results.
In addition to SG-5, confirmatory discrete soil vapor samples were collected at two locations near
SG-1 (SG-9 and SG-10) to further investigate/confirm the Phase 1 sampling results at that location.
The results indicated that the concentrations detected at SG-1 were representative of conditions at
that location.
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All five of the confirmatory discrete soil vapor samples were collected at a depth of 7 to 8 ft bls
following the methodology described in the subsequent section.
3.3.2 Discrete Soil Vapor Sample Collection
In addition to the five confirmatory samples described above, a total of 13 discrete soil vapor
samples were collected during Phase II of the investigation between August 26 and
September 27, 2005 (Figure 2). The samples were collected to expand the area investigated above
the free product plume and to investigate background soil vapor conditions beyond the plume limits.
At each of the soil boring locations, one discrete soil vapor sample was collected at a depth of 7 to 8
ft bls. This depth interval was chosen because it would correlate well with or be more conservative
(deeper) than actual sub-slab samples, which were not practical nor logistically feasible to obtain
beneath residential properties. The 7 to 8 ft bls interval is considered to be representative or more
conservative than sub-slab samples for the following reasons:
o Throughout the residential area, the basements of the residential structures are constructed
such that the ceiling of the basement is actually above the land surface level. It was
observed that a majority of the basements floors appeared to be approximately 4 to 6 feet
below the land surface elevation. Thus, the 7 to 8 foot depth interval beneath the sidewalk
would typically be slightly lower than the adjacent building’s sub-slab soil elevation.
o For buildings without basements, the samples are considerably lower than the sub-slab soil
elevation. In these cases, there is even a greater opportunity for attenuation prior to reaching
the sub-slab.
o The entire study area is paved or covered by buildings and concrete. Therefore, the samples
collected from 7 to 8 foot depth interval beneath sidewalks are covered by in impervious
surface, similar to a building foundation slab. The impervious surface limits potential for
atmospheric interchange that could attenuate concentrations if samples were collected
beneath unpaved areas.
Soil vapor samples were collected in accordance with NYSDOH Draft Guidance (February 2005).
All borings were completed using a Geoprobe® to the target depth. Once the target depth was
achieved, the rods were pulled up to expose the void space and the sampling apparatus was set up at
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the borehole. Soil vapor sampling was then performed utilizing the procedural steps as outlined in
section 3.2.2, with only slight modifications. The modification related to the soil vapor screening,
in which only VOCs, oxygen, and carbon dioxide measurements were collected as specified in the
Phase II Scope of Work. VOC screening concentrations were measured using a PID, calibrated
daily with a 100 parts per million (ppm) isobutylene standard and oxygen and carbon dioxide as
percent volume using a multi-gas meter, calibrated daily with an appropriate multi-gas standard.
The Phase II investigation also included verification of the screening data through the utilization of
separate, redundant gas meters. Field screening data sheets are presented in Appendix E. Upon
completion of the sample collection and screening steps, each soil boring was tremie grouted to land
surface. All soil vapor air samples were analyzed for VOCs using USEPA Method TO-15 and for
methane using USEPA Method TO-3.
3.3.3 Ambient Air Sample Collection
Three ambient air samples were collected at land surface within the plume area during the
completion of the soil vapor activities. These ambient air samples were collected to better define
the background atmospheric conditions within this area. The samples were collected within the
vicinity of soil boring locations SG-14, SG-16, and SG-18. Ambient air samples were analyzed for
VOCs using USEPA Method TO-15 and for methane using USEPA Method TO-3.
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4.0 SOIL VAPOR INVESTIGATION RESULTS
The results of the soil vapor investigation are presented in the following sections:
•
Land Use Survey Results;
•
Overview of Soil Vapor Analytical Results;
•
Development of Site-Specific Soil Vapor Screening Criteria;
•
Evaluation of Analytical Results in the Residential Area; and
•
Evaluation of Analytical Results in the Commercial/Industrial Areas.
4.1 Land Use Survey Results
The Greenpoint area has been a center of industrial activities for over 150 years. Throughout this
time, a wide range of industries have populated not only the shoreline but the inland region as well.
The region is currently composed of commercial, light industrial, and residential areas.
The land use survey verified the boundaries of the residential and commercial/industrial zones
within the Study Area. It also identified the presence or absence of sub-grade structures underlying
the buildings in the Study Area. The residential area is located east of Van Dam Street between
Nassau Avenue and Meeker Avenue, with the exception of a parcel of land between Van Dam
Street and Apollo Street that is operated by GT Rentals, a commercial property. The remaining
land parcels within the Study Area are commercial and industrial. Also of significance is the
presence of the active bulk petroleum storage terminal operated by BP. The land use zones are
detailed in Figure 3.
Within the commercial/industrial zones, all of the buildings appear to be constructed with slab-ongrade foundations.
The only exception is the Peerless Importers building.
The change in
topographic elevation from Newtown Creek to Bridgewater Street effectively makes the southern
portion of the building lower than grade by at least 10 feet. Within the residential area, the majority
of buildings have basements, with the exception of those buildings located along the western side of
Sutton Street, as illustrated on Figure 4.
Both the commercial/industrial and residential areas of the Study Area are heated by a variety of
methods, including natural gas and heating oil. The land use survey identified the presence of
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heating oil tanks and/or associated piping that could be observed from the right-of-way, which is
documented in Appendix E. There are also numerous underground storage tanks in the area utilized
by the various commercial/industrial occupants. Finally, there are major underground pipelines
which extend through the middle of the Study Area and convey large quantities of petroleum and
natural gas products (operated by the Buckeye Pipeline Company and Keyspan, respectively).
4.2 Overview of Soil Vapor Investigation Results
The soil vapor sampling results are presented in the following data tables:
•
Tables 3 through 5 present the field screening and tracer gas results;
•
Tables 6 and 7 present the laboratory analytical results for the full list of VOCs reported
with the TO-15 analysis and for methane (TO-3), respectively; and
•
Table 8 summarizes the analytical results for benzene, toluene, ethylbenzene and xylenes
(BTEX), as well as methane, trichloroethene (TCE) and tetrachloroethene (PCE).
Plate 1 presents the plan view of the Study Area. Plates 2 and 3 present cross sectional views of the
study area and corresponding BTEX and methane results. It should be noted that some of the soil
vapor locations proposed by the scope of works dated August 4 and September 15, 2005, were
modified in the field due to the presence of utilities or limited access. The soil boring locations that
were relocated in the field include; SG-2, SG-4, SG-5, SG-7, SG-9, SG-11, SG-12, SG-16, SG-19,
SG-20, SG-21 and SG-22. The final sampling positions were less than 225 feet away from the
proposed locations.
Benzene and methane are the primary focus in the ensuing evaluation and discussion of the soil
vapor analytical results.
Benzene is the appropriate compound to focus on and provides a
conservative assessment of potential vapor intrusion risk. It was the only compound detected in all
of the soil vapor samples and was detected at the greatest concentrations at all of the sample points
which had detections above background levels. In addition, benzene is the most strictly regulated
component of petroleum products and calculated risk-based levels for benzene in air are generally
substantially lower than for other petroleum constituents. Methane also has an increased risk in that
it has the potential to be ignitable and has the potential to create explosive conditions. Due to the
presence of the free-product plume, which underlies the Study Area, it was anticipated that the
vadose zone directly above the plume would contain elevated levels of BTEX and methane. This
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was confirmed by the results of the CPT-MIP soil borings and by the discrete soil vapor samples
collected at various depths during Phase I of the investigation. As demonstrated in soil borings SG1 through SG-5, the MIP results show that the PID and FID readings dramatically increased as the
probe reached a depth of approximately five feet above the free-product elevation. These results
were confirmed by the discrete samples, where, in general, the greatest concentrations of BTEX and
methane at each sample location were at depths directly above the free-product and in close
proximity to the free product. Figures 5 and 6 are graphs of benzene and methane concentrations,
respectively, versus the vertical distance from the top of the free product layer.
The graphs
illustrate a marked decrease in benzene and methane concentrations as vertical distance to the free
product layer increases.
Samples collected greater than 15 feet above the free product layer
exhibited low benzene concentrations that were several orders of magnitude less than samples
collected less than 10 feet above the product layer. This decrease in concentration with distance
above the product layer is consistent with published studies of soil vapor which have documented
that attenuation processes significantly limit the upward migration of VOCs in soil vapor. The
attenuation processes includes the combination of various degradation processes, sorption onto
organic matter, dispersion and dilution.
In addition to the natural attenuation processes, the low permeability layer that was detected
throughout a majority of the Study Area also limits the upward migration of impacted soil vapor.
The location of low permeability layer is presented on Plates 2 and 3, based on geologic logs from
previously completed monitoring wells and soil borings, as well as the CPT borings completed as
part of this investigation. The clearest example of this layer’s impact on soil vapor migration can be
seen at location SG-4, where the sample from 16 to 18 feet was collected above the low
permeability layer and the sample from 23 to 24 was collected immediately below the layer
(Plate 3). The concentrations in the 16 to 18 foot sample were five orders of magnitude lower than
the concentrations at 23 to 24 feet.
The attenuation processes within the vadose zone and the impact of the low permeability layer are
especially significant when evaluating potential for exposure to soil vapor within the residential
area. The vadose zone is greater than 35 feet thick above the portion of the plume where there is
residential land use. In addition, the low permeability layer was detected in all borings completed
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in this area. Therefore, the combined effects of natural attenuation and the low permeability layer
effectively limit the migration of soil vapor to the shallow subsurface in this area.
While the vertical profiling of soil vapor sample results illustrates the natural attenuation which soil
vapor undergoes after partitioning from the source area, the samples collected at the 7-8 foot
interval provide the best mean to evaluate the potential for soil vapor intrusion. This is because, as
discussed in Section 3.3.2, this depth interval correlates well with or is more conservative than
actual sub-slab samples.
Figures 7 and 8 display the benzene and methane results, respectively, for the soil vapor samples
collected at the 8-foot depth in relation to the boundaries of the free product plume and the
residential area. Those sample locations, which are outside the horizontal extent of the plume, are
considered to represent regional subsurface conditions or background levels that the other sample
concentrations can be compared to. Two soil vapor sampling locations (SG-7 and SG-16) are
located directly above the horizontal extent of the free-product plume as it is depicted in Figure 2.
The horizontal extent of the plume is approximate and due to the proximity of these locations to the
plume boundary, they are considered to be within the plume boundary. Comparison of the benzene
results for samples collected within the plume versus the background samples outside the plume
indicates a very similar range in benzene concentrations. The mean benzene concentration of the
six background samples was 17 ppbv, which was very similar to the mean concentration of 24 ppbv
in the five samples collected from the 8-foot depth within the residential area above the free product
plume. These results indicate that the free product plume is not impacting shallow soil vapor within
the residential area.
Figure 8 shows that methane was generally not detected in the background samples or the samples
collected within the residential area above the free product plume. One exception was the methane
detected in the background sample SG-22, which exhibited a concentration of 40,800 ppmv. The
presence of methane at this location may be attributable to localized influences near SG-22.
Figures 7 and 8 illustrate that the benzene and methane concentrations increase in the northern
portion of the Study Area, specifically in samples from SG-1, SG-9 and SG-10 near the intersection
of Bridgewater Street and Norman Avenue. This commercial/industrial area is lower in elevation
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than the residential area and, as a result, the 8-foot depth interval samples at these locations were
only located approximately 11 feet from the top of the free product layer.
4.3 Development of Site-Specific Soil Vapor Screening Criteria
The previous section provided an overview of the soil vapor sampling results and discussion of
some of the site-specific factors that influence the distribution of soil vapor contaminant
concentrations in the Study Area. However, the soil vapor concentrations do not provide a means to
determine whether there is a need for additional investigation, monitoring, or mitigation. In order to
make this connection, the data must be evaluated relative to the potential for the soil vapor to cause
indoor air quality impacts. In order to complete this evaluation, Roux Associates developed sitespecific soil vapor screening criteria that considered the following:
•
Attenuation factors that can be used to provide conservative estimates of indoor air
concentrations that may result from soil vapor intrusion; and
•
Applicable indoor air quality criteria.
Each of these factors is discussed below.
4.3.1 Sub-slab Attenuation Factors
In order to properly evaluate the soil vapor concentrations and their potential to impact the air
quality in the overlying structures, an attenuation factor needs to be determined to relate sub-slab
vapor concentrations to indoor air concentrations. Sub-slab attenuation factors for indoor vapor
intrusion have been the subject of multiple previous investigations, which was also supplemented
with site-specific data. These are summarized below:
•
An investigation of radon by Mosley et al. (2004) found a range of sub-slab attenuation
factors from 0.002 to 0.009, with a 90th percentile value of 0.006. Little et al. (1992)
reported a representative radon sub-slab attenuation factor of 0.0016 (i.e., indicating slightly
greater attenuation than reported by Mosley et al.). McHugh (2005) reported a radon-based
sub-slab attenuation factor in a small office building of 0.0005, again indicating greater
attenuation than reported by Mosley et al.
•
Wertz & McDonald (2004), reported on the confounding effects of background indoor air
concentration on the calculation and interpretation of sub-slab attenuation factors from a
soil-vapor/indoor-air investigation involving a chlorinated solvent plume at Endicott, NY.
They found that background concentrations in indoor air heavily influenced calculated subslab attenuation factors. Furthermore, they found that the effect of background indoor air
concentrations on sub-slab attenuation factors could be reduced, but not eliminated, by
calculating sub-slab attenuation factors only when soil vapor concentrations were above 100
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X 75% background. Using this approach, they reported 25th - 75th percentile sub-slab
attenuation values and found that 75% of the sub-slab attenuation factors for the combined
PCE, TCE and trichloroethane (TCA) data were 0.006 or less. This, though, did not
eliminate the effect of background concentrations and they calculated theoretical sub-slab
attenuation factors, which minimized the effect of background concentrations, ranging from
0.002 to 0.004, consistent with the radon data of Mosley et al. (2004).
•
Site-specific data were also used to evaluate a sub-slab attenuation factor. During its 2005
investigation, SAIC collected ambient air and sub-slab soil vapor samples from within the
Peerless Importers building. The building is constructed slab on grade, but due to
topographical variations the slab is up to six feet below grade along Bridgewater Street,
representing what could be considered a basement structure. Following the approach of
Wertz and MacDonald (2004), sub-slab attenuation factors were calculated by evaluating
indoor air concentrations around points with elevated sub-slab soil vapor concentrations. In
one area (around CMW-2), sub-slab attenuation factors of 0.0002 to 0.0004 were calculated
for benzene and 0.00003 - 0.00005 for methane. In a second area (around CMW-5), subslab attenuation factor of 0.004 to 0.005 were calculated for benzene and 0.00005 to 0.0001
for methane. In the second area, though, benzene sub-slab concentrations were relatively
low and indoor air concentrations were consistent with background and, thus, the sub-slab
attenuation factors were heavily influenced by indoor air background concentration. The
methane sub-slab attenuation factors are, therefore, more likely representative of the true
sub-slab attenuation factor in this area.
Based upon these studies, an attenuation factor of 0.003 would be considered a conservative
factor to use when evaluating potential for soil vapor intrusion. To add an extra level of
conservatism, though, a sub-slab attenuation factor of 0.006 will be used in developing soil
vapor screening criteria.
4.3.2 Indoor Air Quality Criteria
There have been multiple studies regarding typical background residential levels of benzene in
indoor air. Three of the most representative studies are listed below:
•
The USEPA has compiled by far the largest database of background indoor air values with
over 2,000 data points. Reported values range from 1.0 ppbv (25th percentile) to 6.6 ppbv
(75th percentile). Above the 75th percentile, background benzene concentrations >10 ppbv
were reported.
•
The NYSDOH compiled a database of background indoor air values from 53 residences that
were expected to have typical background values and no impacted soil or groundwater in the
study’s area, the data was collected between 1989 and 1996. Background concentrations
were reported to range from <1.0 ppbv (25th percentile) to 1.6 ppbv (75th percentile). A
95th percentile value of 4.4 ppbv was also reported.
•
The NYSDOH compiled another database of background indoor air values from 100
residences that were expected to have typical background values and no impacted soil or
groundwater in the study area. The data was collected between 1997 and 2003. This study
was limited to houses with heating oil tanks. Background concentrations were reported to
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range from 0.4 (25th percentile) to 1.8 ppbv (75th percentile). A 95th percentile of 4.4 ppbv
was also reported.
A range of values have also been reported for ambient outdoor air benzene concentrations. It
should be noted that it is typical for outdoor ambient air concentrations to be lower than indoor air
concentrations due to the presence of background VOC sources within the buildings.
•
The USEPA has assembled the largest database of outdoor air concentration with more than
5,400 data points. USEPA reported a range of values from 0.6 ppbv (25th percentile) to 3.3
ppbv (75th percentile).
•
NYDOH has also reported a range of outdoor ambient air concentrations based on a much
smaller database (n = 71) ranging from <0.5 ppbv (25th percentile) to 1.5 ppbv (75th
percentile).
•
The average ambient air concentration based on samples collected within the residential area
during Phase II of this investigation ranged from 0.41 to 0.63 ppbv.
Based on the above studies, a background indoor air concentration of 0.70 ppbv for benzene was
selected. This value is well within the typical range of published indoor air background values
(more than 2X this value would not exceed the 25th to 75th percentile published background
values) and is consistent with ambient outdoor air concentration measured in the Study Area and
detailed in established databases.
With regard to the indoor air at commercial / industrial establishments, OSHA sets permissible
exposure limits (PELs) to protect workers against the health effects of exposure to hazardous
substances (www.osha.gov/SLTC/pel/index.html). PELs are regulatory limits on the amount or
concentration of a substance in the air and are based on an 8-hr. time-weighted average (TWA)
exposure. The PEL for benzene is 1 ppmv. Therefore, this value was determined to be the most
appropriate to use when developing the screening criteria for benzene in soil vapor beneath
commercial areas.
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Methane is an odorless, non-toxic gas. However, when present at sufficient concentrations in air it
can pose an ignitability hazard. The lower explosive limit (LEL) for methane is 5 percent per
volume in air, or equivalent to 50,000 ppmv.
4.3.3 Calculation of Screening Criteria
The soil vapor screening criteria can be calculated for residential and commercial areas by dividing
the applicable indoor air criteria by the attenuation factor. Therefore, utilizing the attenuation factor
of 0.006 and the indoor air quality criteria discussed above, the soil vapor screening criteria that will
be used to further evaluate data are as follows:
•
Benzene in soil vapor beneath Residential Area: 120 ppbv
•
Benzene in soil vapor beneath Commercial Area: 170,000 ppbv
•
Methane in soil vapor: 50,000 ppmv
Note that application of the attenuation factor and an acceptable methane indoor air concentration of
20% LEL (10,000 ppmv) would yield a subsurface screening value of 3,330,000 ppmv methane. To
be conservative, the LEL for methane (50,000 ppmv) will be used as the sub-slab soil vapor
screening criterion to evaluate the data. Note also that the SAIC data confirms that this screening
criterion is highly conservative.
4.4 Evaluation of Analytical Results in the Residential Area
As discussed in Section 4.2, the benzene results for samples collected within the plume versus the
background samples outside the plume indicate a very similar range and average benzene
concentration. For the samples collected at the 8-foot depth, the maximum benzene concentrations
in the residential area above the plume and in the background samples were 60 and 69 ppbv,
respectively. Both of these values are well below the screening criteria of 120 ppbv. This data
indicates that the benzene concentrations above the free product plume are similar to background
concentrations in the area and that these concentrations do not pose an indoor air exposure concern.
Likewise, the methane concentrations were typically low or non-detect in samples collected at the
8-foot depth within the residential area above the plume. Therefore, under current conditions,
methane does not appear to be of concern in this area.
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4.5 Evaluation of Analytical Results in the Commercial Area
Within the commercial/industrial area, SG-1 and SG-10 were the only two locations where the
shallow soil vapor samples (8-foot depth) contained benzene at concentrations exceeding the
screening criteria of 170,000 ppbv. It is noted that these samples were collected approximately
11 feet above the top of the free product layer.
Based upon this finding, a door-to-door survey of building occupants within this area was
performed to inquire about the potential presence of basement structures. All of the individuals
indicated that the buildings are constructed as slab-on-grade without basements, which is
information that is consistent with the exterior appearance of the buildings.
In addition to being above the free-product plume, there are multiple potential localized sources in
the area. This area is adjacent to the currently active BP Terminal, the Nassau Oil Terminal, and the
former Paragon Oil Terminal. Based on a review of historic Sanborn maps, a truck repair shop was
located adjacent to the locations of SG-1 and SG-10.
Considering that the samples were collected at a depth of 8-foot bls and that the buildings do not
have basements, there is likely an additional five feet of vadose zone between the sample depth
(8 feet below grade) and the bottom of the foundation slab. This additional thickness of vadose
zone would enable additional attenuation of soil vapor and lessen the potential for migration into
indoor air.
Methane concentrations within the commercial industrial area were similar to the observed benzene
concentrations, in that the only sampling locations that had detections above the LEL were SG-1
and SG-10, with methane concentrations of 144,000 and 167,000 ppmv, respectively.
4.6 Chlorinated Solvent Concentrations
Tetrachloroethene (PCE) was detected at concentrations of 1,500 and 1,040 ppbv at locations SG-20
and SG-21, respectively. TCE was also detected at SG-21 at a concentration of 28,100 ppbv.
SG-20 and SG-21 are both located within the industrial region of the Study Area but outside the
limits of the free product plume. These findings indicate the chlorinated solvents detected at SG-20
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and SG-21, as well as the much lower concentrations detected at other locations dispersed
throughout the Study Area, are from a different source than the free product plume.
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5.0 CONCLUSIONS AND RECOMMENDATIONS
The objective of the investigation was to provide a greater understanding of the soil vapor
conditions present throughout the Study Area and how they are related to the Off-Site Plume. The
following conclusions were determined based upon evaluation of all the data generated during this
investigation.
•
The Study Area is located over a 52-acre free-product plume that is present at depths
ranging from 18 to 46 feet below land surface.
•
The Study Area is composed predominantly of commercial/industrial land use applications,
with a residential area present within the southwestern portion of the Study Area.
•
The Study Area and the Greenpoint region in general has been heavily industrialized since
the 1860s. As with any area that has been industrialized for over 150 years, the shallow
subsurface has been affected by a variety of potential localized sources.
•
The soil vapor present directly above the free-product plume is impacted with petroleum
hydrocarbons, primarily the BTEX compounds.
Methane, produced during the
biodegradation of petroleum hydrocarbons, as well as other wastes and naturally occurring
organic material, is also present within the soil vapor directly above the free product plume.
•
The soil vapor undergoes significant attenuation as it migrates upwards through the vadose
zone. Samples collected greater than 15 feet above the free product layer exhibited low
benzene concentrations that were several orders of magnitude less than samples collected
within 15 feet of the top of the free product layer. The depth to the top of the free product
plume throughout the majority of the Study Area, including the whole residential area, is
greater than 25 feet. The combined effects of natural attenuation and the presence of a
silt/clay (low permeability) layer effectively limit the migration of soil vapor to the shallow
subsurface throughout the majority of the Study Area.
•
Published studies and available site-specific information regarding sub-slab soil vapor to
indoor air attenuation factors supports use of an attenuation factor of 0.006 to estimate
potential indoor air impacts.
•
A sub-slab soil vapor screening criteria of 120 ppbv was calculated for benzene beneath the
residential area. The screening criteria was calculated using the attenuation factor of
0.006 and the background benzene concentration of 0.70 ppbv in indoor air.
•
The shallow soil vapor overlying the free product plume within the residential area is similar
in terms of range and average concentrations to the background samples. In fact, the
maximum benzene concentration detected in shallow soil vapor above the plume was less
than the maximum concentration detected in the background samples beyond the limits of
the free product plume. These results indicate that the free product plume is not impacting
shallow soil vapor beneath the residential area.
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•
There were no exceedances of the sub-slab soil vapor screening criteria within the
residential area. The maximum benzene concentration detected in the shallow soil vapor
above the plume within the residential area was 60 ppbv; which is half the sub-slab soil
vapor screening criterion. This data indicates that the shallow soil vapor (i.e., 8 ft bls)
beneath the residential area does not pose an exposure concern.
•
A sub-slab soil vapor screening criteria of 170,000 ppbv was calculated for benzene beneath
the commercial/industrial area based upon the attenuation factor of 0.006 and the OSHA
PEL of 1 ppmv.
•
Within the commercial/industrial area, SG-1 and SG-10 (located on Apollo Street near the
intersection of Norman Avenue and Bridgewater Street) were the only two locations where
the shallow soil vapor samples (i.e., collected at 8 ft bls) contained benzene at
concentrations exceeding the sub-slab soil vapor screening criteria for benzene of
170,000 ppbv. The shallow samples at SG-1 and SG-10 also contained elevated levels of
methane (144,000 and 167,000 ppmv, respectively). The shallow samples at SG-1 and
SG-10 were collected approximately 11 feet above the top of the free product plume.
•
Buildings near SG-1 and SG-10 are constructed as slab on grade. Considering that the
shallow samples at SG-1 and SG-10 were collected at a depth of 8 ft bls, there is likely at
least an additional 5 feet of vadose zone between the sample depth (i.e., 8 ft bls) and the
bottom of the foundation slab. This additional thickness of vadose zone would enable
further attenuation of soil vapor and lessen the potential for migration into indoor air.
Based upon the conclusions summarized above, the following recommendations are provided for
additional work with respect to the soil vapor conditions beneath the Study Area.
•
The data indicates that, under current site conditions, there is no potential for indoor air
exposure concerns related to the underlying free-product plume within the residential
portion of the Study Area. To be conservative, it is recommended that indoor air samples be
collected within the basement of a limited number of representative residences located
above the plume and within the background area. It is also recommended that local
permitting agencies and utility companies be contacted to investigate potential options that
may be available to limit the potential for drilling or other construction activities that may
penetrate the low permeability layer that underlies this area.
•
Within the industrial area, the data at SG-1 and SG-10 indicate that further investigation is
warranted to further delineate the areal and vertical extent of impacts exceeding the sub-slab
soil vapor screening criteria. As noted, samples were collected at a minimum depth of 8 feet
below grade. Since the buildings in this area do not have basements, additional soil vapor
samples should be collected at a shallower depth (e.g., 2 to 3 feet below grade) to provide a
better representation of sub-slab conditions in the area.
•
In addition, based upon the concentrations detected at SG-1 and SG-10, options will be
reviewed with the NYSDEC to perform LEL screening of select structures in this immediate
area. It is recommended that local permitting agencies and utility companies be contacted to
investigate potential options that may be available to limit the potential for drilling, utility or
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building modifications, or other deep construction activities that would intrusively access
the subsurface.
•
Roux Associates has been monitoring sewers throughout the Study Area for the presence of
VOCs, CO, and percent LEL conditions. Although the monitoring results to date have not
indicated a potential concern, the monitoring program should be continued with more
sampling points added in the area of concern around SG-1 and SG-10.
Respectively Submitted,
Christopher Proce
Project Hydrogeologist
Andrew Baris
Vice President/
Principal Hydrogeologist
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6.0 REFERENCES
Geraghty and Miller, Inc., 1979. Investigation of Underground Accumulation of Hydrocarbons
Along Newtown Creek, Brooklyn, New York.
Little, J. C., Daisey, J. M. and Nazaroff, W. M. 1992. Transport of subsurface contaminants into
buildings: An exposure pathway for volatile organics. Env. Sci. Tech. Vol. 26, No. 11,
pp. 2058 - 2066.
Mosley et al., 2004. Use of Radon and Per Fluorocarbon Measurements to Project VOC Entry
Rates,
USEPA
Vapor
Attenuation
Workshop,
San
Diego,
California.
http://iavi.rti.org/attachments/Resources/AEHS_VI_Workshop_3-15-04_Mosley.pdf
New York State Department of Health, Public Comment Draft, 2005. Guidance for evaluating Soil
Vapor Intrusion in the Sate of New York, New York.
New York State Department of Health, Interim Draft, 2005. Background Indoor/Outdoor
Air Levels of Volatile Organic Compounds in Homes Sampled by the New York
State Department of Health, 1989-1996, New York.
New York State Department of Health, Draft, 2005. Study of Volatile Organic Compounds in Air
of Fuel Oil Heated Homes, 1997-2003, New York.
Roux Associates, Inc., 1991.
New York.
Investigation of the Off-Site Free-Product Plume, Greenpoint,
Roux Associates, Inc., 2003. Supplemental Investigation of the Off-Site Free-Product Plume, OffSite Free-Product Recovery Project, Greenpoint, Brooklyn, New York.
Roux Associates, Inc., 2004. Peerless Importers Remedial Investigation, Greenpoint, Brooklyn,
New York.
Scope of Work for Proposed Investigation Activities,
Off-Site Soil Vapor Investigation, Greenpoint, Brooklyn, New York.
Scope of Work for Proposed Investigation Activities,
Off-Site Soil Vapor Investigation – Phase II, Greenpoint, Brooklyn, New York.
Science Applications International Corporation, 2005. Health and Safety Air Monitoring During
Well Installation Activities, Peerless Importers Property, Brooklyn, New York.
Thomas McHugh. Vapor Intrusion Investigation Methods. Petroleum Vapor Intrusion Workshop.
Costa Mesa, CA., August 17, 2005 (http:\\api-ep.api.org/environment/download/ngwa-2005api-vi-workshop.zip).
U.S. EPA, 1992. Range of values reported in the studies included in “Indoor Air Quality Data Base
for Organic Compounds.
- 29 -
MC17230Y16.706R/R
U.S. E PA, 2003. Users Guide for Evaluating Subsurface Vapor Intrusion Into Buildings, June 19,
2003.
U.S. EPA, 2002. Office of Solid Waster and Emergency Response (OSWER) Draft of the Guidance
for Evaluating The Vapor Intrusion to Indoor Air Pathway From Groundwater Soils (Subsurface
Vapor Intrusion Guidance) November 29, 2002.
Wertz, W., and McDonald, G., 2004. Evaluation of Observed Vapor Attenuation in Upstate New
York.
USEPA
Vapor
Attenuation
Workshop,
San
Diego,
California.
http://iavi.rti.org/attachments/Resources/Wertz-McDonald_Endicott.pdf
- 30 -
MC17230Y16.706R/R
Table 1. Soil Boring Data, Off-Site Soil Vapor Investigation, ExxonMobil, Greenpoint, New York
Soil Boring
Designation
CPT
Designation
Northing*
Easting*
Land Surface
Elevation
Depth of
Soil Gas Boring
Depth of
CPT Boring
Land Use
Classification
(ft amsl)
(ft bls)
(ft bls)
SG-1
CPT-1
204,495.00
1,001,347.45
22.00
18
44.62
Industrial
SG-2
CPT-2
204,166.02
1,001,389.17
35.30
24
58.07
Industrial
SG-3
CPT-3
204,337.61
1,001,956.53
24.53
18
64.96
Industrial
SG-4
CPT-4
203,907.73
1,001,927.14
34.80
30
49.87
Industrial
SG-5
CPT-5
203,689.63
1,001,487.95
47.58
40
57.41
Industrial
SG-6
--
203,761.54
1,001,223.74
38.76
8
--
Residential
SG-7
--
203,219.90
1,001,506.54
45.89
8
--
Residential
SG-8
--
203,812.14
1,001,469.93
46.56
8
--
Industrial
SG-9
--
204,475.50
1,001,141.76
22.33
8
--
Industrial
SG-10
--
204,413.28
1,001,362.39
25.11
8
--
Industrial
SG-11
--
203,506.40
1,000,727.55
29.61
8
--
Residential
SG-12
--
203,698.55
1,000,966.96
31.11
8
--
Residential
SG-13
--
203,705.35
1,001,491.84
47.48
8
--
Industrial
SG-14
--
203,615.20
1,002,370.40
40.88
8
--
Industrial
SG-15
--
203,290.16
1,000,757.20
31.00
8
--
Residential
SG-16
--
203,296.79
1,001,278.60
40.73
8
--
Residential
SG-17
--
203,605.26
1,001,503.50
48.52
8
--
Residential
SG-18
--
203,597.71
1,001,768.76
44.55
8
--
Residential
SG-19
--
203,063.33
1,001,045.13
32.79
8
--
Residential
SG-20
--
202,740.36
1,001,573.99
42.13
8
--
Industrial
SG-21
--
204,137.56
1,000,912.36
27.23
8
--
Industrial
SG-22
--
203,087.83
1,001,310.24
38.42
8
--
Residential
SG-23
--
203,373.92
1,001,005.67
31.40
8
--
Residential
Notes:
ft - feet
bls - below land surface
amsl - above mean sea level
NA - not applicable
Mean sea level referenced to U.S. Coast and Geodetic Survey Datum, Sandy Hook, New Jersey
* Horizontal locations are based on the New York State Plane Coordinate System, Long Island Zone, North American Datum of 1983 (NAD 83)
Elevations are based on the National Geodetic Vertical Datum of 1929 (NGVD 29).
1 of 1
MC17230Y16.706/T1
Table 2.
Off-Site Soil Vapor Investigation
ExxonMobil Refining & Supply Company
August 15, 2005
Elevation of
Measuring Point
Well Number
(ft-amsl)
Free-Product
Specific Gravity
Depth to FreeProduct
Depth to Water
(ft below
(ft below
measuring point) measuring point)
Oil/Water
Interface
Elevation (ftamsl)
Ground Water
Elevation
(ft-amsl)
Free-Product
Elevation
(ft-amsl)
Free-Product
Thickness (ft)
MW-1
MW-2
MW-3
MW-4
MW-5
MW-7
MW-9
MW-12
MW-14
MW-15
MW-16
MW-18
MW-19
MW-20
MW-22
MW-23
MW-24
MW-25
MW-26
MW-27
MW-28
MW-29
MW-30
MW-31
MW-32
MW-33
MW-34
MW-35
MW-36
MW-37
MW-38
MW-39
MW-40
MW-41
MW-42
MW-43
MW-44
MW-45
MW-46
MW-47
MW-48
MW-49
MW-50D
MW-51
12.67
7.59
15.77
23.74
22.92
26.31
25.61
38.36
29.46
47.19
54.12
42.65
38.06
31.04
19.19
21.66
17.49
16.58
21.39
24.22
31.21
17.94
48.14
40.28
19.08
20.91
25.07
21.61
42.71
38.27
36.11
47.01
26.49
20.02
18.73
19.60
18.61
19.13
17.86
18.66
18.23
16.46
16.51
17.01
-0.89
0.80
-0.81
0.79
0.80
0.79
0.79
0.79
0.81
---0.80
0.80
0.80
0.80
--0.79
0.79
-0.79
0.79
0.79
0.80
0.79
0.80
0.78
0.78
0.79
0.80
-0.89
0.94
-0.80
--0.80
0.86
-0.86
--13.13
NM
20.23
-22.05
NM
24.55
44.80
----16.00
--14.02
--28.79
15.23
-37.89
17.16
18.45
22.53
-40.31
35.91
33.60
44.65
24.07
-12.55
17.27
-12.57
--12.65
13.13
-15.02
8.88
6.11
14.72
NM
23.06
23.90
22.97
NM
24.57
46.41
51.73
38.18
23.28
16.23
16.40
18.23
14.91
14.30
19.40
21.65
29.92
15.40
45.46
39.22
17.39
20.56
24.30
18.85
41.14
37.47
35.55
45.76
25.32
16.79
21.46
17.53
6.96
14.29
11.11
14.13
20.71
14.19
16.25
24.15
--1.05
NM
-0.14
-2.64
NM
4.89
0.78
----2.79
--2.28
--1.29
2.54
-1.06
1.69
0.35
0.77
-1.57
0.80
0.56
1.25
1.17
--2.73
2.07
-4.84
---2.48
2.27
--7.14
3.79
1.48
2.32
NM
2.14
2.41
3.38
NM
4.91
2.04
2.39
4.47
14.78
14.81
3.11
3.43
2.58
2.50
1.99
2.57
2.18
2.67
2.68
2.11
1.87
2.01
2.18
2.76
2.23
2.02
2.09
2.13
2.17
3.23
5.20
2.31
11.65
6.22
6.75
4.53
3.95
3.19
0.26
0.76
--2.64
NM
2.69
-3.56
NM
4.91
2.39
----3.19
--2.56
--2.42
2.71
-2.39
1.92
2.46
2.54
-2.40
2.36
2.51
2.36
2.42
-6.18
2.33
-6.56
--5.58
3.33
-1.99
--1.59
NM
2.83
-0.92
NM
0.02
1.61
----0.40
--0.28
--1.13
0.17
-1.33
0.23
2.11
1.77
-0.83
1.56
1.95
1.11
1.25
-8.91
0.26
-1.72
--8.06
1.06
-9.13
MW-52
MW-53
MW-54
MW-55
MW-56
MW-57
MW-58
MW-59
MW-60
MW-61
MW-62
MW-63
MW-64
17.04
17.78
18.83
18.52
13.30
20.74
22.22
23.48
18.27
22.31
14.02
11.39
7.53
0.88
0.88
0.88
0.83
0.80
0.80
0.80
0.80
0.79
-----
13.48
17.69
-11.77
10.76
18.43
19.91
21.09
15.31
-----
18.21
20.41
9.94
11.94
15.11
20.53
21.41
22.40
18.21
20.03
12.33
8.77
6.10
-1.17
-2.63
-6.58
-1.81
0.21
0.81
1.08
0.06
-----
3.00
-0.23
8.89
6.72
1.66
1.89
2.01
2.12
2.36
2.28
1.69
2.62
1.43
3.56
0.09
-6.75
2.54
2.31
2.31
2.39
2.96
-----
4.73
2.72
-0.17
4.35
2.10
1.50
1.31
2.90
-----
1 of 2
Notes
8
8
8
8
8
8
8
8
8
8
8
8
8
8
9
9
9
9
10
10, 25
10
10
11
11
12
12
12
12
12
12
12
12
14, 25
14
14
14
14
14
14
14
14
14
14
14
14
14
14
24
24
24
24
24
24
24
24
24
24
MC17230Y16.706R/T2
Table 2.
August 15, 2005
Elevation of
Measuring Point
Well Number
(ft-amsl)
Free-Product
Specific Gravity
Depth to FreeProduct
Depth to Water
(ft below
(ft below
measuring point) measuring point)
Oil/Water
Interface
Elevation (ftamsl)
Ground Water
Elevation
(ft-amsl)
Free-Product
Elevation
(ft-amsl)
Free-Product
Thickness (ft)
Notes
MW-66
MW-67
MW-68
MW-69
MW-70
MW-72
MW-73
MW-74
MW-75
MW-76
MW-77
MW-78
GP-A
GP-B
GP-C
GP-D
6.53
6.44
6.49
6.86
6.38
9.97
9.67
10.40
9.88
10.24
10.19
12.33
22.43
22.18
21.97
21.95
-0.85
0.85
0.86
0.86
-0.82
0.82
0.84
0.84
-0.80
0.80
0.80
-0.80
-4.13
4.75
4.74
4.05
-8.62
8.53
8.21
7.89
-9.93
17.83
18.14
NM
17.75
4.41
4.19
5.01
5.01
4.53
9.82
11.82
12.40
11.44
8.02
8.00
11.88
18.43
18.16
NM
18.51
-2.25
1.48
1.85
1.85
--2.15
-2.00
-1.56
2.22
-0.45
4.00
4.02
NM
3.44
2.12
2.30
1.70
2.08
2.26
0.15
0.46
1.18
1.14
2.33
2.19
2.01
4.48
4.04
NM
4.05
-2.31
1.74
2.12
2.33
-1.05
1.87
1.67
2.35
-2.40
4.60
4.04
NM
4.20
-0.06
0.26
0.27
0.48
-3.20
3.87
3.23
0.13
-1.95
0.60
0.02
NM
0.76
MW-RWB
S-4
42.23
15.19
0.78
0.80
39.83
NM
41.42
NM
0.81
NM
2.06
NM
2.40
NM
1.59
NM
RW-A
RW-C
RW-D
RW-E
RW-F
RW-G
48.38
32.21
25.58
19.21
19.74
15.89
0.79
0.79
0.80
0.80
0.81
0.81
54.61
31.75
23.38
16.46
---
55.12
32.01
23.49
16.69
17.22
13.15
-6.74
0.20
2.09
2.52
---
-6.34
0.40
2.18
2.70
2.52
2.74
-6.23
0.46
2.20
2.75
---
0.51
0.26
0.11
0.23
---
22, 25
NC-2
NC-2
13.44
13.44
---
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
NM
23
24
24
24
24
24
24
24
24
24
24
24
24
22, 26
22, 27
22
22
22
23
Notes
1. All monitoring wells resurveyed for horizontal and vertical coordinates in June, 2001. The above table has been revised to show updated elevations.
2. Elevations are based on the National Geodetic Vertical Datum of 1929 (NGVD 29).
3. Monitoring wells designated with an NM for groundwater elevation or free-product thickness were unable to be measured due to inaccessibility of the well (i.e., cars/trucks
parked on top of well, well covered with debris and/or well could not be located).
4. Monitoring wells MW-1 through MW-21 were installed by Roux Associates, Inc. from December 1990 through January 1991.
5. Monitoring wells MW-22 through MW-25 were installed by Roux Associates, Inc. in July 1991.
6. Monitoring wells MW-26 through MW-29 were installed by Roux Associates, Inc. on April 2-4, 1996.
7. Monitoring wells MW-30 and MW-31 were installed on September 19, 1997 and October 3, 1997, respectively, by Roux Associates, Inc.
8. Monitoring wells MW-32 through MW-39 were installed on June 25, 2001 through July 11, 2001 by Roux Associates, Inc.
9. Monitoring wells MW-6, MW-10, MW11 and MW-17 no longer exist.
10. Monitoring well MW-21 was damaged during bulkhead construction activities at the Peerless Importers facility and rendered unusable.
11. The designation of former Meeker Avenue Task Force RW-2 was changed to Recovery Well G when the recovery well was incorporated into the Off-Site Free-Product
Recovery System.
12. Groundwater elevations have been corrected, where necessary, for the presence of free-product using the specific gravities shown.
13. Off-Site recovery wells RW-A, RW-C, RW-D, and RW-E were operating at 51, 49, 48, and 20 gpm at the time of measurement.
RW-F and RW-G were not operating at the time of measurement.
14. NC-2 is surface water level monitoring stations on Newtown Creek located at the end of Meeker Avenue
15. Monitoring wells MW-56 through MW-78 were installed by Roux Associates, Inc. in October 2004
NM - Not measured
ND - Not detected
NA - Data not available.
2 of 2
MC17230Y16.706R/T2
Table 3.
Borehole Screening Data
Off-Site Soil Vapor Investigation - Phase I
Greenpoint Remediation Project
Borehole Location Sampling Interval
Base Depth
(ft-bls)
Adjacent
Monitoring Well
Approximate Depth to
Free-Product
PID
LEL
Hydrogen Sulfide
Carbon Monoxide
Oxygen
(ft-bls)
(ppm)
(%)
(ppm)
(ppm)
(% vol)
SG-1
7-8
8
MW-33
18.45
424
>100
2
337
18.9
SG-1
16 - 18
18
MW-33
18.45
457
>100
3
558
18.3
SG-2
7-8
8
MW-33 / MW-15
32.43
0
0
0
0
20.9
SG-2
16 - 18
18
MW-33 / MW-15
32.43
498
73
0
297
18.6
SG-2
23 - 24
24
MW-33 / MW-15
32.43
73.9
8
0
68
20.9
SG-3
7-8
8
MW-59
21.09
31.1
7
0
0
18.5
SG-3
16 - 18
18
MW-59
21.09
606
>100
4
152
19.7
SG-4
7-8
8
MW-37
35.91
0
0
0
0
19.6
SG-4
16 - 18
18
MW-37
35.91
0
0
0
1
19.6
SG-4
23 - 24
24
MW-37
35.91
860
>100
5
750
18.3
SG-4
28 - 30
30
MW-37
35.91
17.5
0
0
5
20.5
SG-5
7-8
8
MW-15
46.41
47.4
7
0
26
20.3
SG-5
16 - 18
18
MW-15
46.41
50.2
7
0
54
20.3
SG-5
23 - 24
24
MW-15
46.41
35.4
3
0
19
20.9
SG-5
39 - 40
40
MW-15
46.41
333
>100
0
888
18.7
SG-6
7-8
8
MW-38
33.60
0
0
1
0
20.4
SG-7
7-8
8
MW-15 / MW-18
42.30
0
0
0
0
20.9
SG-8
7-8
8
MW-15
46.41
0
0
0
0
20.9
1 of 1
MC17230Y16.706R/T3
Table 4. Borehole Screening Data for Soil Vapor Investigation
Off-Site Soil Vapor Investigation - Phase II
Borehole
Location
Sampling
Interval
Base Depth
(ft-bls)
Adjacent
Monitoring
Well
Depth to
Product
(ft-bls)
VOCs #1
(ppm)
VOCs #2
(ppm)
SG-9
7-8
8
MW-39
22.65
554.0
451.0
SG-10
7-8
8
MW-33
18.45
462.0
SG-11
7-8
8
MW-14
24.55
SG-12
7-8
8
MW-14
SG-13
7-8
8
SG-14
7-8
SG-15
CO2 #2
(%)
O2 #1
(%)
O2 #2
(%)
>5
13.0
0.0
0.0
340.0
16.0
--
0.4
--
29.2
2.0
5.0
5.2
16.6
16.4
24.55
81.8
10.4
>5
6.2
13.9
14.0
MW-15
46.41
7.3
0.0
0.0
0.0
19.7
20.9
8
MW-36
40.31
6.0
3.9
2.7
--
16.9
--
7-8
8
MW-20
16.23
16.0
--
0.5
0.6
19.2
19.0
SG-16
7-8
8
MW-31
37.89
3.0
3.4
0.2
--
20.4
--
SG-17
7-8
8
MW-15
44.80
105.0
81.9
0.0
0.2
16.6
18.5
SG-18
7-8
8
MW-37/
MW-39
40.28
5.1
3.4
2.0
2.1
18.1
18.1
SG-19
7-8
8
MW-20/
MW-18
27.21
6.0
52.0
>5
8.2
10.5
11.5
SG-20
7-8
8
MW-18
38.18
8.0
7.8
2.8
2.8
9.3
10.0
SG-21
7-8
8
MW-14
25.55
42.3
47.2
>5
8.4
11.4
12.0
SG-22
7-8
8
MW-18
27.21
80.8
29.4
>5
11.6
0.0
0.6
SG-23
7-8
8
MW-20
16.23
189.0
12.1
0.6
0.2
19.3
20.1
1 of 1
CO2 #1
(%)
MC17230Y16.706R/T4
Table 5. Tracer Gas Data for Soil Vapor Investigation - Phase I and 2
Off-Site Soil Vapor Investigation - Phase I & II
Borehole
Location
Sampling Interval
Base Depth
(ft-bls)
Helium Bucket
Concentration
(mL/s)
Twenty Percent of
Bucket Concentration
(mL/s)
Helium Sample
Tubing
Concentration
(mL/s)
SG-1
7-8
8
9.0E-02
1.8E-02
0.0E-4
SG-1
16 - 18
18
1.0E-01
2.0E-02
0.0E-4
SG-2
7-8
8
2.0E-01
4.0E-02
0.0E-4
SG-2
16 - 18
18
1.0E-01
2.0E-02
0.0E-4
SG-2
23 - 24
24
N/A
N/A
N/A
SG-3
7-8
8
2.0E-01
4.0E-02
0.0E-4
SG-3
16 - 18
18
1.0E-01
2.0E-02
0.0E-4
SG-4
7-8
8
6.0E-02
1.2E-02
0.0E-4
SG-4
16 - 18
18
2.0E-01
4.0E-02
0.0E-4
SG-4
23 - 24
24
N/A
N/A
N/A
SG-4
28 - 30
30
N/A
N/A
N/A
SG-5
7-8
8
1.0E-01
2.0E-02
0.0E-4
SG-5
16 - 18
18
1.0E-01
2.0E-02
0.0E-4
SG-5
23 - 24
24
N/A
N/A
N/A
SG-5
39 - 40
40
N/A
N/A
N/A
SG-6
7-8
8
2.E-02
4.0E-03
0.0E-5
SG-7
7-8
8
2.E-02
4.0E-03
0.0E-5
SG-8
7-8
8
1.E-02
2.0E-03
0.0E-5
SG-8
8-8
9
1.E-02
2.0E-03
2.0E-04
SG-9
9-8
10
2.E-02
4.0E-03
6.0E-04
SG-10
10 - 8
11
1.E-02
2.0E-03
3.0E-04
SG-11
11 - 8
12
1.E-02
2.0E-03
0.0E-4
SG-12
12 - 8
13
1.E-02
2.0E-03
0.0E-5
SG-13
13 - 8
14
2.E-01
4.0E-02
3.0E-02
SG-14
14 - 8
15
1.E-01
2.0E-02
6.0E-04
SG-15
15 - 8
16
2.E-02
4.0E-03
1.0E-04
SG-16
16 - 8
17
3.E-03
6.0E-04
0.0E-5
SG-17
17 - 8
18
2.E-01
4.0E-02
9.0E-04
SG-18
18 - 8
19
4.E-03
8.0E-04
0.0E-5
SG-19
19 - 8
20
7.E-03
1.4E-03
0.0E-5
SG-20
20 - 8
21
1.E-02
2.0E-03
0.0E-5
SG-21
21 - 8
22
1.E-02
2.0E-03
0.0E-5
SG-22
22 - 8
23
3.E-02
6.0E-03
2.0E-03
SG-23
23 - 8
24
2.E-02
4.0E-03
1.0E-04
Notes:
N/A: Tracer gas not utlized for soil vapor locations greater than 18 feet below grade.
SG-5 (Dup) was completed approximately 100 feet north of the original location.
1 of 1
MC17230Y16.706R/T5
Table 6. Summary of Soil Vapor and Ambient Air Data,
ExxonMobil Corporation, Greenpoint Remediation Project, Brooklyn, New York
Parameter
(Concentrations in ppbv)
1,1,1-Trichloroethane
1,1,2,2-Tetrachloroethane
1,1-Dichloroethane
1,1-Dichloroethene
1,2,4-Trichlorobenzene
1,2,4-Trimethylbenzene
1,2-Dibromoethane
1,2-Dichlorobenzene
1,2-Dichloroethane
1,2-Dichloropropane
1,3-Butadiene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,4-Dioxane
2,2,4-Trimethylpentane
2-Butanone (MEK)
2-Chlorotoluene
2-Hexanone
2-Propanol
3-Chloropropene
4-Ethyltoluene
4-Methyl-2-pentanone
Acetone
Benzene
Benzyl Chloride
Bromodichloromethane
Bromoethene
Bromoform
Bromomethane
Carbon disulfide
Carbon tetrachloride
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
cis-1,2-Dichloroethene
cis-1,3-Dichloropropene
Cyclohexane
Dibromochloromethane
Dichlorodifluoromethane
Ethanol
Sample Designation:
Sample Date:
AMBIENT-1
08/18/05
AMBIENT-18
09/23/05
AMBIENT-14
09/22/05
AMBIENT-16
09/22/05
SG-1/18
08/18/05
SG-1/8
08/18/05
SG-2/18
08/17/05
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.18 J
0.20 U
NA
0.20 U
0.20 U
0.20 U
0.20 U
NA
NA
0.20 U
0.20 U
NA
0.20 U
0.20 U
NA
0.20 U
0.20 U
NA
0.20 U
10.1
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
1.3
0.20 U
0.20 U
0.29
0.20 U
0.20 U
19.1
0.20 U
0.40
15.8
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.26
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
NA
1.2
0.20 U
0.20 U
0.92
0.20 U
0.20 U
0.12 J
10.1
0.63
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.38
0.20 U
0.20 U
0.26
0.20 U
0.20 U
5.6
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.60
0.20 U
0.20 U
0.20 U
0.20 U
0.18 J
0.20 U
0.20 U
0.20 U
0.20 U
NA
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.17 J
0.20 U
3.4
0.47
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.078 J
0.20 U
0.20 U
0.20 U
0.27
0.20 U
0.20 U
0.20 U
0.20 U
0.57
7.0
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.19 J
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
NA
0.38
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.097 J
3.5
0.41
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
0.081 J
0.69
0.20 U
0.20 U
0.26
0.20 U
0.20 U
0.20 U
0.20 U
0.52
4.7
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
NA
9600 U
9600 U
9600 U
9600 U
NA
NA
9600 U
9600 U
NA
9600 U
9600 U
NA
9600 U
9600 U
NA
9600 U
952000
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
2060000
9600 U
9600 U
24000 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
NA
4800 U
4800 U
4800 U
4800 U
NA
NA
4800 U
4800 U
NA
4800 U
4800 U
NA
4800 U
4800 U
NA
4800 U
418000
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
899000
4800 U
4800 U
12000 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
NA
5200 U
5200 U
5200 U
5200 U
NA
NA
5200 U
5200 U
NA
5200 U
5200 U
NA
5200 U
5200 U
NA
5200 U
361000
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
703000
5200 U
5200 U
13000 U
1 of 10
MC17230Y16.706R/T6
Parameter
Sample Designation:
Sample Date:
Ethyl Acetate
Ethylbenzene
Freon 113
Freon 114
Heptane
Hexachlorobutadiene
Hexane
Isooctane
Isopropyl Alcohol
m+p-Xylene
m-Dichlorobenzene
Methyl ethyl ketone
Methyl Isobutyl Ketone
MTBE
Methylene chloride
n-Heptane
o-Dichlorobenzene
n-Hexane
o-Xylene
p-Dichlorobenzene
Propylene
Styrene
t-Butyl Alcohol
Tetrachloroethene
Tetrahydrofuran
Toluene
trans-1,2-Dichloroethene
trans-1,3-Dichloropropene
Trichloroethene
Trichlorofluoromethane
Vinyl Acetate
Vinyl chloride
Xylenes (total)
AMBIENT-1
08/18/05
AMBIENT-18
09/23/05
AMBIENT-14
09/22/05
AMBIENT-16
09/22/05
SG-1/18
08/18/05
SG-1/8
08/18/05
SG-2/18
08/17/05
0.20 U
0.37
0.14 J
0.20 U
11.2
0.20 U
41.2
NA
0.20 U
1.7
0.20 U
0.20 U
0.20 U
0.20 U
0.20 U
NA
0.20 U
NA
0.47
0.20 U
0.50 U
0.20 U
0.20 U
0.15 J
0.20 U
3.4
0.20 U
0.20 U
0.20 U
0.20
0.20 U
0.20 U
2.2
0.20 U
0.19 J
0.097 J
0.20 U
NA
0.20 U
NA
0.33
NA
0.75
NA
NA
NA
0.20
0.60
0.29
NA
0.56
0.20
NA
0.50 U
0.20 U
0.20 U
0.12 J
0.20 U
4.0
0.20 U
0.20 U
0.20 U
0.24
0.20 U
0.20 U
0.95
0.94
0.49
0.28
0.20 U
NA
0.20 U
NA
0.38
NA
1.6
NA
NA
NA
0.20 U
0.29
0.34
NA
0.89
0.55
NA
0.50 U
0.20 U
0.20 U
0.16 J
0.20 U
2.3
0.20 U
0.20 U
0.20 U
0.27
0.20 U
0.20 U
2.1
0.20 U
0.22
0.29
0.20 U
NA
0.20 U
NA
0.41
NA
0.68
NA
NA
NA
0.20
0.32
0.28
NA
0.61
0.21
NA
0.50 U
0.20 U
0.20 U
0.26
0.20 U
2.8
0.20 U
0.20 U
0.20 U
0.26
0.20 U
0.20 U
0.89
9600 U
28300
9600 U
9600 U
1100000
9600 U
3280000
NA
9600 U
40300
9600 U
9600 U
9600 U
9600 U
9600 U
NA
9600 U
NA
5750 J
9600 U
24000 U
9600 U
9600 U
9600 U
9600 U
13000
9600 U
9600 U
9600 U
9600 U
9600 U
9600 U
46000
4800 U
5670
4800 U
4800 U
277000
4800 U
841000
NA
4800 U
8620
4800 U
4800 U
4800 U
4800 U
4800 U
NA
4800 U
NA
4800 U
4800 U
12000 U
4800 U
4800 U
4800 U
4800 U
3440 J
4800 U
4800 U
4800 U
4800 U
4800 U
4800 U
8620
5200 U
11500
5200 U
5200 U
485000
5200 U
1520000
NA
5200 U
62000
5200 U
5200 U
5200 U
5200 U
5200 U
NA
5200 U
NA
15500
5200 U
13000 U
5200 U
5200 U
5200 U
5200 U
112000
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
77500
ppbv - Parts per billion/volume
U - The analyte was analyzed for, but not
detected above the reported quantitation limit.
E - Exceeds calibration limit
J - Estimated value
NA - Not analyzed
2 of 10
MC17230Y16.706R/T6
Parameter
1,1-Dichloroethane
1,1-Dichloroethene
1,2-Dibromoethane
1,2-Dichlorobenzene
1,2-Dichloroethane
1,2-Dichloropropane
1,3-Butadiene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,4-Dioxane
2-Butanone (MEK)
2-Chlorotoluene
2-Hexanone
2-Propanol
3-Chloropropene
4-Ethyltoluene
Acetone
Benzene
Benzyl Chloride
Bromoethene
Bromoform
Bromomethane
Carbon disulfide
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Cyclohexane
Ethanol
Sample Designation:
Sample Date:
SG-2/24
08/17/05
SG-2/8
08/17/05
SG-3/18
08/18/05
SG-3/8
08/18/05
SG-4/18
08/17/05
SG-4/24
08/17/05
SG-4/30
08/17/05
SG-4/8
08/17/05
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
NA
2300 U
2300 U
2300 U
2300 U
NA
NA
2300 U
2300 U
NA
2300 U
2300 U
NA
2300 U
2300 U
NA
2300 U
166000
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
354000
2300 U
2300 U
5800 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
NA
21 U
21 U
21 U
21 U
NA
NA
21 U
21 U
NA
21 U
21 U
NA
21 U
21 U
NA
21 U
579
21 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
21 U
1270
21 U
21 U
52 U
9800 U
9800 U
9800 U
9800 U
9800 U
9800 U
9800 U
9800 U
NA
9800 U
9800 U
9800 U
9800 U
NA
NA
9800 U
9800 U
NA
9800 U
9800 U
NA
9800 U
9800 U
NA
9800 U
341000
9800 U
9800 U
9800 U
9800 U
9800 U
9800 U
9800 U
9800 U
180000
9800 U
9800 U
9800 U
9800 U
862000
9800 U
9800 U
25000 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
NA
9.6 U
9.6 U
9.6 U
9.6 U
NA
NA
9.6 U
9.6 U
NA
9.6 U
9.6 U
NA
9.6 U
9.6 U
NA
9.6 U
346
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
7220
9.6 U
9.6 U
9.6 U
9.6 U
6020
9.6 U
9.6 U
24 U
2.0 J
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
2.7
2.1 U
NA
2.1 U
2.1 U
2.1 U
2.1 U
NA
NA
2.1 U
2.1 U
NA
2.1 U
2.1 U
NA
2.1 U
1.2 J
NA
2.1 U
3.7
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
37.6
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
5.3 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
NA
10000 U
10000 U
10000 U
10000 U
NA
NA
10000 U
10000 U
NA
10000 U
10000 U
NA
10000 U
10000 U
NA
10000 U
463000
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
898000
10000 U
10000 U
26000 U
130 U
130 U
130 U
130 U
130 U
130 U
90.0 J
130 U
NA
130 U
130 U
71.6 J
130 U
NA
NA
130 U
130 U
NA
130 U
130 U
NA
130 U
130 U
NA
130 U
8700
130 U
130 U
130 U
130 U
130 U
130 U
130 U
130 U
130 U
130 U
130 U
130 U
130 U
16700
130 U
130 U
320 U
0.97 J
1.8 U
1.8 U
1.8 U
1.8 U
1.8 U
42.6
1.8 U
NA
1.8 U
1.8 U
18.4
1.8 U
NA
NA
1.8 U
1.8 U
NA
1.8 U
1.8 U
NA
1.8 U
7.1
NA
1.8 U
44.5
1.8 U
1.8 U
1.8 U
1.8 U
1.8 U
3.6
1.8 U
1.8 U
19.0
9.3
1.8 U
1.8 U
1.8 U
93.2
1.8 U
1.8 U
5.6
3 of 10
MC17230Y16.706R/T6
Parameter
Sample Designation:
Sample Date:
Ethyl Acetate
Ethylbenzene
Freon 113
Freon 114
Heptane
Hexachlorobutadiene
Hexane
Isooctane
Isopropyl Alcohol
m+p-Xylene
m-Dichlorobenzene
Methyl ethyl ketone
MTBE
Methylene chloride
n-Heptane
o-Dichlorobenzene
n-Hexane
o-Xylene
p-Dichlorobenzene
Propylene
Styrene
t-Butyl Alcohol
Tetrachloroethene
Tetrahydrofuran
Toluene
Trichloroethene
Vinyl Acetate
Vinyl chloride
Xylenes (total)
SG-2/24
08/17/05
SG-2/8
08/17/05
SG-3/18
08/18/05
SG-3/8
08/18/05
SG-4/18
08/17/05
SG-4/24
08/17/05
SG-4/30
08/17/05
SG-4/8
08/17/05
2300 U
1010 J
2300 U
2300 U
213000
2300 U
798000
NA
2300 U
3810
2300 U
2300 U
2300 U
2300 U
2300 U
NA
2300 U
NA
2300 U
2300 U
5800 U
2300 U
2300 U
2300 U
2300 U
22200
2300 U
2300 U
2300 U
2300 U
2300 U
2300 U
4640
21 U
20.0 J
21 U
21 U
857
21 U
2810
NA
21 U
70.4
21 U
21.7
21 U
21 U
21 U
NA
21 U
NA
16.4 J
21 U
52 U
21 U
21 U
21 U
21 U
101
21 U
21 U
21 U
21 U
21 U
21 U
86.9
9800 U
13800
9800 U
9800 U
536000
9800 U
1860000
NA
9800 U
45300
9800 U
9800 U
9800 U
9800 U
9800 U
NA
9800 U
NA
4820 J
9800 U
25000 U
9800 U
9800 U
9800 U
9800 U
57100
9800 U
9800 U
9800 U
9800 U
9800 U
9800 U
50100
9.6 U
6.4 J
9.6 U
9.6 U
377
9.6 U
2590
NA
9.6 U
20.3
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
NA
9.6 U
NA
5.6 J
9.6 U
24 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
9.6 U
25.8
2.1 U
1.8 J
2.1 U
2.1 U
2.8
2.1 U
9.3
NA
2.1 U
6.4
2.1 U
2.1 U
2.1 U
2.1 U
2.1 U
NA
2.1 U
NA
2.8
2.1 U
137
3.0
2.1 U
49.8
2.1 U
4.4
2.1 U
2.1 U
7.2
2.1 U
2.1 U
2.1 U
9.1
10000 U
25300
10000 U
10000 U
689000
10000 U
2230000
NA
10000 U
66900
10000 U
10000 U
10000 U
10000 U
10000 U
NA
10000 U
NA
8040 J
10000 U
26000 U
10000 U
10000 U
10000 U
10000 U
69000
10000 U
10000 U
10000 U
10000 U
10000 U
10000 U
75000
130 U
759
130 U
130 U
14000
130 U
41300
NA
130 U
2270
130 U
130 U
130 U
130 U
130 U
NA
130 U
NA
291
130 U
320 U
130 U
130 U
130 U
130 U
2200
130 U
130 U
130 U
130 U
130 U
130 U
2560
1.8 U
6.4
1.8 U
1.8 U
65.7
1.8 U
190
NA
1.8 U
26.0
1.8 U
1.8 U
1.8 U
1.8 U
1.8 U
NA
1.8 U
NA
9.8
1.8 U
219
2.8
2.9
122
1.8 U
19.4
1.8 U
1.8 U
4.4
1.2 J
1.8 U
1.8 U
35.8
J - Estimated value
NA - Not analyzed
4 of 10
MC17230Y16.706R/T6
Parameter
1,1-Dichloroethane
1,1-Dichloroethene
1,2-Dibromoethane
1,2-Dichlorobenzene
1,2-Dichloroethane
1,2-Dichloropropane
1,3-Butadiene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,4-Dioxane
2-Butanone (MEK)
2-Chlorotoluene
2-Hexanone
2-Propanol
3-Chloropropene
4-Ethyltoluene
Acetone
Benzene
Benzyl Chloride
Bromoethene
Bromoform
Bromomethane
Carbon disulfide
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Cyclohexane
Ethanol
Sample Designation:
Sample Date:
SG-5/18
08/19/05
SG-5/24
08/19/05
SG-5/40
08/19/05
SG-5/8
08/19/05
SG-6
08/29/05
SG-7
08/29/05
SG-8
08/29/05
SG-9
09/23/05
490 U
490 U
490 U
490 U
490 U
490 U
490 U
490 U
NA
490 U
490 U
490 U
490 U
NA
NA
490 U
490 U
NA
490 U
490 U
NA
490 U
490 U
NA
490 U
6070
490 U
490 U
490 U
490 U
490 U
490 U
490 U
490 U
490 U
490 U
490 U
490 U
490 U
42600
490 U
490 U
1200 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
NA
410 U
410 U
410 U
410 U
NA
NA
410 U
410 U
NA
410 U
410 U
NA
410 U
410 U
NA
410 U
26000
410 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
410 U
249000
410 U
410 U
1000 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
NA
2400 U
2400 U
2400 U
2400 U
NA
NA
2400 U
2400 U
NA
2400 U
2400 U
NA
2400 U
2400 U
NA
2400 U
136000
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
525000
2400 U
2400 U
6000 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
NA
230 U
230 U
230 U
230 U
NA
NA
230 U
230 U
NA
230 U
230 U
NA
230 U
230 U
NA
230 U
2340
230 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
230 U
22700
230 U
230 U
580 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
10.5
1.6 U
1.6 U
1.6 U
1.6 U
3.9
1.6 U
1.6 U
1.6 U
1.6 U
NA
4.8
1.6 U
1.6 U
1.6 U
1.6 U
4.7
1.6 U
148
10.7
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
2.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
18.6
1.2 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
10
1.6 U
1.6 U
1.6 U
1.6 U
3.3
1.6 U
1.6 U
1.6 U
1.6 U
NA
15.7
1.6 U
1.6 U
1.6 U
1.6 U
4.1
1.6 U
167
10.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
45.5
1.2 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
4.8
1.6 U
1.6 U
1.6 U
1.6 U
1.2 J
1.6 U
24.0
6.2
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
29.6
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
5.6
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
NA
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
56400
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
421000
920 U
920 U
2300 U
5 of 10
MC17230Y16.706R/T6
Parameter
Sample Designation:
Sample Date:
Ethyl Acetate
Ethylbenzene
Freon 113
Freon 114
Heptane
Hexachlorobutadiene
Hexane
Isooctane
Isopropyl Alcohol
m+p-Xylene
m-Dichlorobenzene
Methyl ethyl ketone
MTBE
Methylene chloride
n-Heptane
o-Dichlorobenzene
n-Hexane
o-Xylene
p-Dichlorobenzene
Propylene
Styrene
t-Butyl Alcohol
Tetrachloroethene
Tetrahydrofuran
Toluene
Trichloroethene
Vinyl Acetate
Vinyl chloride
Xylenes (total)
SG-5/18
08/19/05
SG-5/24
08/19/05
SG-5/40
08/19/05
SG-5/8
08/19/05
SG-6
08/29/05
SG-7
08/29/05
SG-8
08/29/05
SG-9
09/23/05
490 U
490 U
490 U
490 U
8260
490 U
51600
NA
490 U
490 U
490 U
490 U
490 U
490 U
490 U
NA
490 U
NA
490 U
490 U
1200 U
490 U
490 U
490 U
490 U
1690
490 U
490 U
490 U
490 U
490 U
490 U
490 U
410 U
267 J
410 U
410 U
53100
410 U
348000
NA
410 U
485
410 U
410 U
410 U
410 U
410 U
NA
410 U
NA
210 J
410 U
1000 U
410 U
410 U
410 U
410 U
9300
410 U
410 U
410 U
410 U
410 U
410 U
696
2400 U
2280 J
2400 U
2400 U
218000
2400 U
1090000
NA
2400 U
25400
2400 U
2400 U
2400 U
2400 U
2400 U
NA
2400 U
NA
6390
2400 U
6000 U
2400 U
2400 U
2400 U
2400 U
78600
2400 U
2400 U
2400 U
2400 U
2400 U
2400 U
31800
230 U
230 U
230 U
230 U
6500
230 U
32800
NA
230 U
230 U
230 U
230 U
230 U
230 U
230 U
NA
230 U
NA
230 U
230 U
580 U
230 U
230 U
230 U
230 U
690
230 U
230 U
230 U
230 U
230 U
230 U
230 U
1.6 U
13.6
1.6 U
1.6 U
NA
1.6 U
NA
1.6
NA
50.3
NA
NA
NA
8.1
1.6 U
11.7
NA
14.3
16.5
NA
4.0 U
1.6 U
1.6 U
2.1
1.6 U
319
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
66.8
1.6 U
11.0
1.6 U
1.6 U
NA
1.6 U
NA
2.1
NA
41.0
NA
NA
NA
9.5
0.87 J
63.3
NA
85.6
11.8
NA
103
1.6 U
2.9
0.90 J
1.6 U
58.3
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
52.8
1.6 U
6.0
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
18.6
NA
NA
NA
46.8
1.6 U
6.7
NA
10.5
4.5
NA
55.4
1.6 U
1.6 U
2.9
1.6 U
32.4
1.6 U
1.6 U
1.6 U
1.9
1.6 U
1.6 U
23.0
920 U
920 U
920 U
920 U
NA
920 U
NA
171000
NA
920 U
NA
NA
NA
920 U
920 U
20900
NA
152000
920 U
NA
2300 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
920 U
599 J
J - Estimated value
NA - Not analyzed
6 of 10
MC17230Y16.706R/T6
Parameter
1,1-Dichloroethane
1,1-Dichloroethene
1,2-Dibromoethane
1,2-Dichlorobenzene
1,2-Dichloroethane
1,2-Dichloropropane
1,3-Butadiene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,4-Dioxane
2-Butanone (MEK)
2-Chlorotoluene
2-Hexanone
2-Propanol
3-Chloropropene
4-Ethyltoluene
Acetone
Benzene
Benzyl Chloride
Bromoethene
Bromoform
Bromomethane
Carbon disulfide
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Cyclohexane
Ethanol
Sample Designation:
Sample Date:
SG-10
09/23/05
SG-11
09/27/05
SG-12
09/26/05
SG-13
09/19/05
SG-14
09/22/05
SG-15
09/27/05
SG-16
09/22/05
SG-17
09/22/05
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
NA
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
551000
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
1200000
5200 U
5200 U
13000 U
0.67 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
5.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
67.7
0.70 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
2.1
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
4.0 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
4.4
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
58.0
0.64 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
0.74 J
1.6 U
1.6 U
1.6 U
0.72 J
1.1 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
4.2
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
6.1
1.6 U
1.6 U
1.6 U
1.6 U
1.8
1.6 U
1.6 U
1.6 U
1.6 U
NA
4.2
1.6 U
1.6 U
1.6 U
1.6 U
1.8
1.6 U
39.5
3.7
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
2.9
1.6 U
1.6 U
1.6 U
0.89 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
7.8
1.6 U
1.6 U
1.6 U
2.2
1.6 U
1.6 U
3.8
1.6 U
1.6 U
1.6 U
1.6 U
2.4
1.6 U
1.6 U
1.6 U
1.6 U
NA
392
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
90.0
19.4
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
2.7
1.6 U
1.6 U
4.0
1.2 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
40.0
4.0 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.0 J
1.6 U
1.6 U
1.6 U
1.6 U
1.0 J
1.6 U
1.6 U
1.6 U
1.6 U
NA
2.0
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
27.5
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
14.4
1.6 U
1.6 U
1.2 J
6.4
2.8
1.6 U
1.6 U
92.5
1.6 U
1.6 U
4.0 U
1.6 U
1.6 U
1.1 J
1.6 U
1.6 U
1.6 U
23.0
1.6 U
1.6 U
1.6 U
1.6 U
12.1
1.6 U
1.6 U
1.6 U
1.6 U
NA
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
6.8
1.6 U
158
60.1
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
4.9
1.6 U
1.6 U
1.6 U
0.80 J
1.6 U
1.6 U
1.6 U
49.7
1.6 U
1.6 U
5.7
2.1
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
13.1
1.6 U
1.6 U
1.6 U
1.6 U
7.1
1.6 U
1.6 U
1.6 U
1.6 U
NA
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
4.4
1.6 U
40.2
30.5
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
35.4
1.6 U
1.6 U
9.7
7 of 10
MC17230Y16.706R/T6
Parameter
Sample Designation:
Sample Date:
Ethyl Acetate
Ethylbenzene
Freon 113
Freon 114
Heptane
Hexachlorobutadiene
Hexane
Isooctane
Isopropyl Alcohol
m+p-Xylene
m-Dichlorobenzene
Methyl ethyl ketone
MTBE
Methylene chloride
n-Heptane
o-Dichlorobenzene
n-Hexane
o-Xylene
p-Dichlorobenzene
Propylene
Styrene
t-Butyl Alcohol
Tetrachloroethene
Tetrahydrofuran
Toluene
Trichloroethene
Vinyl Acetate
Vinyl chloride
Xylenes (total)
SG-10
09/23/05
SG-11
09/27/05
SG-12
09/26/05
SG-13
09/19/05
SG-14
09/22/05
SG-15
09/27/05
SG-16
09/22/05
SG-17
09/22/05
5200 U
5200 U
5200 U
5200 U
NA
5200 U
NA
5200 U
NA
5200 U
NA
NA
NA
5200 U
5200 U
28400
NA
380000
5200 U
NA
13000 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
5200 U
2620 J
1.6 U
1.6 U
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
1.6 U
NA
NA
NA
1.6 U
1.6 U
1.6 U
NA
1.6 U
1.6 U
NA
56.9
0.64 J
1.6 U
50.3
1.6 U
1.3 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.4 J
1.3 J
1.6 U
1.6 U
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
1.4 J
NA
NA
NA
1.6 U
1.1 J
1.6 U
NA
0.87 J
1.6 U
NA
85.0
1.6 U
1.6 U
2.8
1.6 U
2.2
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.4 J
1.6 U
3.6
1.6 U
1.6 U
NA
1.6 U
NA
1.4 J
NA
14.7
NA
NA
NA
1.6 U
2.5
2.2
NA
5.8
5.1
NA
4.0 U
1.6 U
1.6 U
1.5 J
1.6 U
23.7
1.6 U
1.6 U
1.6 U
2.1
1.6 U
1.6 U
19.8
1.6 U
2.0
0.76 J
1.6 U
NA
1.6 U
NA
2.6
NA
10.1
NA
NA
NA
1.6 U
0.86 J
4.3
NA
8.7
4.5
NA
77.9
1.6 U
1.6 U
2.2
234
19.5
1.6 U
1.6 U
1.4 J
2.0
1.6 U
1.6 U
14.6
1.6 U
3.1
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
20.3
NA
NA
NA
1.6 U
1.6 U
35.3
NA
82.8
7.1
NA
58.5
1.6 U
1.6 U
3.7
5.7
35.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
3.8
27.4
1.6 U
19.6
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
129
NA
NA
NA
1.6 U
1.6 U
27.8
NA
80.4
55.6
NA
49.8
1.6 U
8.7
3.5
1.6 U
106
1.6 U
1.6 U
1.6 U
1.1 J
1.6 U
1.6 U
185
1.6 U
15.4
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
123
NA
NA
NA
1.6 U
1.6 U
19.4
NA
31.9
50.7
NA
4.0 U
1.6 U
1.6 U
2.3
15.0
91.5
1.6 U
1.6 U
1.6 U
831
1.6 U
1.6 U
174
J - Estimated value
NA - Not analyzed
8 of 10
MC17230Y16.706R/T6
Parameter
1,1-Dichloroethane
1,1-Dichloroethene
1,2-Dibromoethane
1,2-Dichlorobenzene
1,2-Dichloroethane
1,2-Dichloropropane
1,3-Butadiene
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,4-Dioxane
2-Butanone (MEK)
2-Chlorotoluene
2-Hexanone
2-Propanol
3-Chloropropene
4-Ethyltoluene
Acetone
Benzene
Benzyl Chloride
Bromoethene
Bromoform
Bromomethane
Carbon disulfide
Chlorobenzene
Chloroethane
Chloroform
Chloromethane
Cyclohexane
Ethanol
Sample Designation:
Sample Date:
SG-18
09/23/05
SG-19
09/26/05
SG-20
09/27/05
SG-21
09/23/05
SG-22
09/27/05
SG-23
09/26/05
1.4 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
43.4
9.0
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
5.3
1.6 U
1.6 U
1.6 U
5.3
1.6 U
1.6 U
7.7
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
33.5
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
217
68.7
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6
1.6 U
10.8
1.6 U
6.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
8.5
16.2
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.0 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
28.2
1.6 U
1.6
6.6
1.6 U
1.6 U
1.7
311
6.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
17.9
1.6 U
1.6 U
1.6 U
2.4
3.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
27.9
994
9.2 U
9.2 U
16.1
14.6
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
NA
11.4
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
104
4.5 J
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
9.2 U
52.5
9.2 U
171
9.2 U
9.2 U
9.2 U
9.2 U
23 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
2.6
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
2.7
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
4.3
1.6 U
1.6 U
1.6 U
1.7
2.8
1.6 U
1.6 U
491
1.6 U
1.6 U
4.0 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
10.2
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
150
1.7
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
2.2
1.6 U
1.6 U
1.6 U
1.1 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
5.1
9 of 10
MC17230Y16.706R/T6
Parameter
Sample Designation:
Sample Date:
Ethyl Acetate
Ethylbenzene
Freon 113
Freon 114
Heptane
Hexachlorobutadiene
Hexane
Isooctane
Isopropyl Alcohol
m+p-Xylene
m-Dichlorobenzene
Methyl ethyl ketone
MTBE
Methylene chloride
n-Heptane
o-Dichlorobenzene
n-Hexane
o-Xylene
p-Dichlorobenzene
Propylene
Styrene
t-Butyl Alcohol
Tetrachloroethene
Tetrahydrofuran
Toluene
Trichloroethene
Vinyl Acetate
Vinyl chloride
Xylenes (total)
SG-18
09/23/05
SG-19
09/26/05
SG-20
09/27/05
SG-21
09/23/05
SG-22
09/27/05
SG-23
09/26/05
1.6 U
2.9
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
6.1
NA
NA
NA
3.8
1.1 J
0.80 J
NA
6.6
2.4
NA
4.0 U
1.6 U
5.8
69.4
1.6 U
6.1
1.6 U
1.6 U
2.1
1.6 U
1.6 U
1.6 U
8.4
1.6 U
52.3
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
105
NA
NA
NA
56.5
1.6 U
1.3 J
NA
74.8
45.6
NA
244
2.1
59.3
25.1
1.6 U
68.8
1.6 U
1.6 U
0.82 J
1.6 U
1.6 U
0.86 J
150
1.6 U
1.5 J
1.6 U
1.6 U
NA
1.6 U
NA
1.5 J
NA
3.6
NA
NA
NA
1.6 U
1.6 U
4.6
NA
10.4
1.5 J
NA
341
1.8
1.6 U
1500
1.6 U
8.3
1.6 U
1.6 U
4.4
24.0
1.6 U
1.0 J
5.1
9.2 U
9.2 U
9.2 U
9.2 U
NA
9.2 U
NA
9.2 U
NA
9.2 U
NA
NA
NA
9.2 U
98.4
9.2 U
NA
9.2 U
9.2 U
NA
23 U
9.2 U
9.2 U
1040
9.2 U
9.2 U
7.5 J
9.2 U
28100
9.2 U
9.2 U
9.2 U
9.2 U
1.6 U
1.6 U
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
1.7
NA
NA
NA
1.6 U
1.6 U
93.1
NA
815
0.74 J
NA
4.0 U
0.73 J
1.6 U
1.7
1.6 U
0.97 J
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
2.5
1.6 U
1.6 U
1.6 U
1.6 U
NA
1.6 U
NA
1.6 U
NA
2.7
NA
NA
NA
1.6 U
0.90 J
1.6 U
NA
5.3
1.1 J
NA
119
1.3 J
1.6
5.1
1.6 U
1.8
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
1.6 U
3.9
J - Estimated value
NA - Not analyzed
10 of 10
MC17230Y16.706R/T6
Table 7. Summary of Methane in Soil Vapor and Ambient Air Data,
Parameter
(Concentrations in ppmv)
Sample Designation:
Sample Date:
Methane
AMBIENT-1
08/18/05
AMBIENT-18
09/23/05
AMBIENT-14
09/22/05
AMBIENT-16
09/22/05
SG-1/18
08/18/05
SG-1/8
08/18/05
SG-2/18
08/17/05
10.6
6.2 U
5.9 U
6.0 U
289000 E
144000 E
23100 E
ppmv - Parts per million/volume
E - The concentration of the compound exceeds the calibration limit and the reported result is not within the control limit.
The actual concentration may be higher than reported.
1 of 6
MC17230Y16.706R/T7
Parameter
Sample Designation:
Sample Date:
Methane
SG-2/24
08/17/05
SG-2/8
08/17/05
SG-3/18
08/18/05
SG-3/8
08/18/05
SG-4/18
08/17/05
SG-4/24
08/17/05
SG-4/30
08/17/05
SG-4/8
08/17/05
12100 E
85.4
142000 E
10400 E
16.7
111000 E
2230 E
46.4
E - The concentration of the compound exceeds the calibration l
2 of 6
MC17230Y16.706R/T7
Parameter
Sample Designation:
Sample Date:
Methane
SG-5/18
08/19/05
SG-5/24
08/19/05
SG-5/40
08/19/05
SG-5/8
08/19/05
SG-6
08/29/05
SG-7
08/29/05
SG-8
08/29/05
2960 E
6210 E
8920 E
282
6.0 U
6.5U
7.2U
3 of 6
MC17230Y16.706R/T7
Parameter
Sample Designation:
Sample Date:
Methane
SG-9
09/23/05
SG-10
09/23/05
SG-11
09/27/05
SG-12
09/26/05
SG-13
09/19/05
SG-14
08/29/05
SG-14
09/22/05
SG-15
08/29/05
46700 E
167000 E
6.0 U
6.3 U
6.2 U
6.5 U
5.8 U
7.2 U
4 of 6
MC17230Y16.706R/T7
Parameter
Sample Designation:
Sample Date:
Methane
SG-15
09/27/05
SG-16
09/22/05
SG-17
09/22/05
SG-18
09/23/05
SG-19
09/26/05
SG-20
09/27/05
SG-21
09/23/05
SG-22
09/27/05
6.2 U
6.0 U
6.0 U
5.8 U
5.8 U
10.6
5.8 U
40800 E
5 of 6
MC17230Y16.706R/T7
Parameter
Sample Designation:
Sample Date:
Methane
SG-23
09/26/05
6.0 U
6 of 6
MC17230Y16.706R/T7
Table 8.
Borehole Location
Summary of Soil Vapor and Ambient Air Data - BTEX, Methane, PCE and TCE
Soil Vapor Investigation
Sampling Interval
Base Depth
(ft-bls)
Adjacent
Monitoring Well
Depth to Product1
(ft-bls)
Benzene
(ppbv)
Ethylbenzene
(ppbv)
Toluene
(ppbv)
Total Xylenes
(ppbv)
Methane
(ppmv)
Tetrachloroethene
(ppbv)
Trichloroethene
(ppbv)
SG-1
7-8
8
MW-33
18.45
418,000
5,670
3,440
8,620
144,000
ND
ND
SG-1
16 - 18
18
MW-33
18.45
952,000
28,300
13,000
46,000
289,000
ND
ND
SG-2
7-8
8
MW-33 / MW-15
32.43
579
20.0
101
87
85.4
ND
ND
SG-2
16 - 18
18
MW-33 / MW-15
32.43
361,000
11,500
112,000
77,500
23,100
ND
ND
SG-2
23 - 24
24
MW-33 / MW-15
32.43
166,000
1,010
22,200
4,640
12,100
ND
ND
SG-3
7-8
8
MW-59
21.09
346
6.4
ND
26
10,400
ND
ND
SG-3
16 - 18
18
MW-59
21.09
341,000
13,800
57,100
50,100
142,000
ND
ND
SG-4
7-8
8
MW-37
35.91
44.5
6.4
19.4
36
46.4
122
1.2
SG-4
16 - 18
18
MW-37
35.91
3.7
1.8
4.4
9
16.7
49.8
ND
SG-4
23 - 24
24
MW-37
35.91
463,000
25,300
69,000
75,000
111,000
ND
ND
SG-4
28 - 30
30
MW-37
35.91
8,700
759
2,200
2,560
2,230
ND
ND
SG-5
7-8
8
MW-15
46.41
2,340
ND
690
ND
282
ND
ND
SG-5
16 - 18
18
MW-15
46.41
6,070
ND
1,690
ND
2,960
ND
ND
SG-5
23 - 24
24
MW-15
46.41
26,000
267
9,300
696
6,210
ND
ND
SG-5
39 - 40
40
MW-15
46.41
136,000
2,280
78,600
31,800
8,920
ND
ND
SG-6
7-8
8
MW-38
33.60
10.7
13.6
319
66.8
ND
2.1
ND
SG-7
7-8
8
MW-15 / MW-18
42.30
10.8
11.0
58.3
52.8
ND
0.9
ND
SG-8
7-8
8
MW-15
46.41
6.2
6.0
32.4
23.0
ND
2.9
1.9
SG-9
7-8
8
MW-9
22.05
56,400
ND
ND
599
46,700
ND
ND
SG-10
7-8
8
MW-33
18.45
551,000
ND
ND
2,620
167,000
ND
ND
SG-11
7-8
8
MW-14
24.55
0.7
ND
1.3
1.3
ND
50.3
ND
SG-12
7-8
8
MW-14
24.55
0.64
ND
2.2
1.4
ND
2.8
ND
SG-13
7-8
8
MW-15
46.41
3.7
3.6
23.7
19.8
ND
1.5
ND
SG-14
7-8
8
MW-36
40.31
19.4
2.0
19.5
14.6
ND
2.2
1.4
SG-15
7-8
8
MW-20
16.23
27.5
3.1
35.8
27.4
ND
3.7
ND
SG-16
7-8
8
MW-31
37.89
60.1
19.6
106
185
ND
3.5
ND
SG-17
7-8
8
MW-15
44.80
30.5
15.4
91.5
174
ND
2.3
831
SG-18
7-8
8
MW-37 / MW-39
40.28
9.0
2.9
6.1
8.4
ND
69.4
2.1
SG-19
7-8
8
MW-20 / MW-18
27.21
68.7
52.3
68.8
150
ND
25.1
0.82
SG-20
7-8
8
MW-18
38.18
6.8
1.5
8.3
5.1
10.6
1,500
4.4
SG-21
7-8
8
MW-14
24.55
4.5
ND
ND
ND
ND
1,040
28,100
SG-22
7-8
8
MW-20 / MW-18
27.21
2.7
ND
0.97
2.5
40,800
1.7
ND
SG-23
7-8
8
MW-20
16.23
1.7
ND
1.8
3.9
ND
5.1
ND
Ambient SG-1
--
Land Surface
MW-33
--
10.1
0.37
3.4
2.2
10.6
0.15
ND
Ambient SG-14
--
Land Surface
MW-36
--
0.47
0.49
2.3
2.1
ND
0.16
ND
Ambient SG-16
--
Land Surface
MW-38
--
0.41
0.22
2.8
0.9
ND
0.26
ND
Ambient SG-18
--
Land Surface
MW-39
--
0.63
0.19
4.0
1.0
ND
0.12
ND
Note:
1. Soil borings that are not located above the horizontal extent of the free-product plume reference depth to water.
1 of 1
MC17230Y16.706R/T8
NEWTOWN
CREEK
FORMER PARAGON FACILITY
(CURRENTLY PEERLESS IMPORTERS)
BP AMOCO
TERMINAL
OFF-SITE
SYSTEM
RESIDENTAL
AREA
BROOKLYN-QUEENS
EXPRESSWAY
STUDY AREA
BOUNDARY
Title:
SITE PLAN
EXPLANATION
GREENPOINT
BROOKLYN, NEW YORK
BP AMOCO TERMINAL
FORMER PARAGON FACILITY
EXTENT OF RESIDENTIAL AREA
EXTENT OF SOIL VAPOR STUDY AREA
N
OFF-SITE SOIL VAPOR INVESTIGATION
GREENPOINT, BROOKLYN, NEW YORK
Prepared For:
EXXONMOBIL REFINING & SUPPLY CO.
INWOOD, NEW YORK
Compiled by: C.P.
Date: 07OCT05
Prepared by: C.P.
Scale: AS SHOWN
ROUX ASSOCIATES INC Project Mgr: J.P.K.
Environmental Consulting
& Management
File No: MC3070608
Office: NEW YORK
Project: 17230Y16
FIGURE
1
this map has been altered
from its original format
TCE or PCE
concentrations exceed
established NYSDOH
levels for sub slab
concentrations,
TCE limit: 250 mcg/m3 ,
PCE limit: 1,000 mcg/m3
PCE concentrations at 7-8 feet
below ground were 1,040 ppbv
or 6,948 mcg/m3
TCE concentrations at 7-8 feet
or 148,772 mcg/m3
PCE concentrations at 7-8 feet
or 10,404 mcg/m3
Figure 5. Vadose Zone Attenuation For Benzene Concentrations
1,000,000
900,000
Soil Vapor Sample
Benzene Concentration (ppbv)
800,000
700,000
600,000
500,000
400,000
300,000
200,000
100,000
0
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
Distance From Soil Vapor Sample to Free-Product1 (Feet)
Note:
ppbv - parts per billion by volume
MC17230Y16.706/F6
Figure 6. Vadose Zone Attenuation For Methane Concentrations
350,000
300,000
Methane Concentration (ppmv)
Soil Vapor Sample
250,000
200,000
150,000
100,000
50,000
0
0.00
5.00
10.00
15.00
20.00
25.00
30.00
35.00
40.00
45.00
1
Distance From Soil Vapor Sample to Free-Product (Feet)
Note:
ppbv - parts per million by volume
MC17230Y16.706/F7
benzene concentrations
in soil vapor exceed the
screening criteria for
residential areas of 120
ppbv
methane concentrations
in soil vapor exceed the
screening criteria of
50,000 ppmv
APPENDIX A
CPT-UVIF Soil Boring Logs
MC17320Y.706/AP-CV
APPENDIX B
Science Applications International Corporation,
August 2005 Report
MC17320Y.706/AP-CV
APPENDIX C
Results of Electronic Database Review
MC17320Y.706/AP-CV
Preliminary Summary of Land Uses Adjacent to Proposed Sampling Locations
ExxonMobil Refining & Supply
Note: In order to identify potential sources for soil vapor contamination apart from the Off-Site free-product plume, a database
review was conducted in the areas adjacent to each of the proposed soil vapor locations to be completed for the Phase II
investigation.
Proposed Soil Vapor
Sampling Location Documented Historic Land Use Adjacent to Sampling Location
SG-8
- British Petroleum (BP) Bulk Petroleum Storage Terminal located at 125 Apollo
Street. Prior to the operation of the BP Terminal, Mobil Oil Corporation operated
the property as the Mobil Brooklyn Refinery, which was present since the late
1800s.
- Trans Boro Container Service Incorporated (302 Norman Avenue) . The property
contains above ground storage tanks (ASTs) of an unknown quantity.
SG-9
SG-10
SG-11
SG-12
SG-13
SG-14
SG-15
SG-16
- Long Island Carpet Cleaners (301 Norman Avenue). The property is an active
cleaning facility that has underground storage tanks (USTs) containing petroleum
products of an unknown quantity. Chlorinated solvents may have also been
historically used at the property.
1800s.
- New York Fuel Terminal Corporation operates a facility in the vicinity although no
addition information of the company is available.
1800s.
- Henkel Adhesives Corporation located at 100 Sutton Street operated a resin
producing facility. This facility held up to 5,000 gallons petroleum products in
ASTs.
- 115 Sutton Street , no company information. The property held up to 5,000
gallons petroleum products in ASTs.
No potential sources of environmental contamination / concern found in the
vicinity of proposed location during preliminary database review.
- GT Rentals located at 310 Nassau Avenue. The property contains ASTs
containing petroleum products and auto repair work is completed on premises.
- Recovery Well ‘A’ - ExxonMobil Off-Site Free-Product Recovery System is
located at 44 Apollo Street and includes a 4,000-gallon UST containing recovered
free-product.
- T.W. Smith located at 885 Meeker Avenue. The property contains up to 5,000
gallons of petroleum products in USTs.
- New York Oil Recovery Incorporated (94 Hausman Street). The property held
over 12,000 gallons of petroleum products for storage and distribution.
1 of 2
mc17230Y695/Att1
Preliminary Summary of Land Uses Adjacent to Proposed Sampling Locations
ExxonMobil Refining & Supply
Note: In order to identify potential sources for soil vapor contamination apart from the Off-Site free-product plume, a database
review was conducted in the areas adjacent to each of the proposed soil vapor locations to be completed for the Phase II
investigation.
Proposed Soil Vapor
Sampling Location Documented Historic Land Use Adjacent to Sampling Location
SG-17
- GT Rentals located at 310 Nassau Avenue. The property contains ASTs
containing petroleum products and auto repair work is completed on premises.
SG-18
SG-19
SG-20
SG-21
SG-22
- John’s Truck Parts located at 817 Meeker Avenue. No company information is
available.
- Acme Steel Partition Company located at 72 Anthony Street operated a furniture
manufacture facility. The property contains up to 5,000 gallons of petroleum
products in USTs.
- Art City located at 96 Anthony Street. The company is a small quantity generator
of hazardous waste, no information of petroleum products is available.
- Choral Group located at 171 Lombardy Street. The property contains up to 500
- City Wide Demolition at 151 Anthony Street. The property contains up to 550
2 of 2
mc17230Y695/Att1
Land Use Survey
Apollo Street
House Number
9
11
13
15
16
17
18
19
20
21
22
23
23A
24
25
26
28
29
30
31
32
33
34
34A
35
36
37
37
39
41
43
45
47
49
51
53
55
55A
Basement (Y/N)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Natural Gas
Fuel Oil
Comments
Could not determine house's heating method.
X
X
This house used electrical heating according to
house's owner.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Hausman Street
House Number
3
5
7
9
10
11
12
13
14
15
16
17
18
19
20
22
23
25
27
29
30
31
32
33
34
35
36
38
39
41
42
43
44
45
46
47
48
49
Basement (Y/N)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Natural Gas
Fuel Oil
Comments
Vent pipe exiting basement window.
X
X
X
X
X
X
Appears to be two properties with one big house.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Appears to be the combination of several
properties into one.
X
X
X
X
X
House Number
50
51
52
53
54
55
56
57
58
59
60
Basement (Y/N)
Y
Y
Y
Y
Y
Y
Y
Y
Y
?
Y
Natural Gas
X
61
62
?
Y
X
X
63
64
?
Y
X
X
65
66
?
Y
X
X
67
68
69
70
71
72
73
?
Y
?
Y
Y
Y
Y
X
Fuel Oil
Comments
X
X
X
X
X
X
X
X
X
Could not determine whether or not subsurface
structures exist.
structures exist.
structures exist.
X
structures exist.
X
X
X
Morgan Avenue
House Number
549
551
553
555
557
559
560
561
562
562A
563
564
565
566
567
568
569
570
571
572
573
574
575
576
576A
577
578
579
580
581
582
583
584
585
586
586A
587
588
589
590
591
592
593
594
595
596
Basement (Y/N)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Natural Gas
X
X
X
X
X
X
Fuel Oil
X
X
X
X
X
X
X
X
X
Comments
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
PVC vent pipe exiting from basement window.
X
PVC vent pipe exiting from basement window.
X
X
House Number
Basement (Y/N)
Natural Gas
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
625
627
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Fuel Oil
Comments
Appears to be an old fuel oil vent pipe leaning
against house.
X
X
X
X
X
X
X
X
X
X
Sutton Street
House Number
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
37A
38
39
39A
40
41
42
43
44
45
47
48
49
50
51
52
53
54
56
58
58A
Basement (Y/N)
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
Natural Gas
X
X
X
X
X
X
X
X
X
X
X
X
59/55
60
61
62
63
65
66
67
68
69
N
N
N
N
N
N
N
N
N
N
X
71
73
N
N
X
74
75
76
77
78
79
80
81
82
N
N
N
N
N
N
N
N
N
Fuel Oil
Comments
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Church appears to have combined a few former
X
X
X
X
X
X
X
X
X
X
X
X
X
Signage present on house: "Fedder's Air
Conditioning"
Appears to be the combination of several
X
Van Dam Street
House Number
7
9
11
13
15
17
17A
19
21
23
25
25A
27
29
31
Basement (Y/N)
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Natural Gas
X
X
X
X
X
X
X
X
X
X
Fuel Oil
Comments
APPENDIX D
MIP Soil Boring Logs
MC17320Y.706/AP-CV
APPENDIX E
Soil Vapor Sampling Forms
MC17320Y.706/AP-CV
Soil Vapor Sampling Form
Date: 9/23/2005
Time:
10:00 AM
Weather : high 85, humid, sunny
Temperature:
79 F
Humidity:
Wind Magnitude:
5.8 mph
Wind Direction: NW
Barometric Pressure:
29.97 in
Falling / Rising
62%
Sampling Team: B. Ben-Eliezer, J. Hime
Sampling Location: SG-9
Site Condition (i.e. any adjacent questionable facilities, vent pipes, tanks, etc. and what type of basements are present)
Sampling point is approximately 30 ft south of Norman on Hausman St.; BP Amoco is on north side of Norman opposite
of sampling point; SG-9 is located on unpaved sidewalk approximately 6 ft from fence along "Point Recycling" truck yard;
Point Recycling waste processing facility is located on west side of street
Prior to commencing the GeoProbe activity, ensure that all the rods were properly deconed and a new disposable tip is present at
the end of the rods.
Utility Clearance Completed:
Sampling Depth:
Sealed at land surface and rod tip:
Purge Rate:
Purge Time:
Helium Rate at enclosure:
Helium Rate from sample tubing:
Calibrate the Helium detection meter
Y
7-8'
feet below land surface
Y
Bentonite/Clay/Rubber glove
184 ml/min
Must be less than 0.2 L/min
note : Assuming 0.17" I.D. tubing purge 15 sec. for every 10 ft of tubing
1 E -2
Y
2 E -4
Is this rate <20% of the rate at the enclosure
If the Helium readings have a greater ratio than 20% the seals should be rechecked and the tracer gas should be reapplied.
Once the tracer gas screening procedures are completed and no short-circuiting is determined to be present at the location the
soil vapor sample can be collected in a lab certified clean summa canister at a rate less than 0.2 L/min.
Finishing pressure should be within 0.5 - 4 " of Hg
Is the Summa Canister Certified Clean and within the proper holding time ?
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-31.0
10:17 AM
10:55 AM
3.9
Summa Canister Identification #:
Flow Regulator ID #
Sample ID #
A 276
FC 92
SG-9
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
10:55 AM
TO-3
Prior to screening the soil vapor, ALL vapor detection instruments should be calibrate to fresh air and a standard gas. The soil
vapor shall be screened with duplicate meters to verify the results. If inconsistent results are obtained, calibrate both meters again
and if it persists move the soil vapor sampling point to another location
Meter ID #
Carbon Dioxide Concentration
Percentage of Oxygen
Volatile Organic Concentration
Meter 1
04102/R5118
> 5.0
0.0
451
%
%
ppm
Meter 2
03443/R5268
13.0
0.0
554
%
%
ppm
If the Readings are not reasonable the soil vapor sample point should be moved to another location.
Date: 9/23/2005
Time:
8:15 AM
Weather : sunny, high of 85, humid
Temperature:
72 F
Humidity:
Wind Magnitude:
4.6 mph
Wind Direction: variable
29.94 in
Falling / Rising
78%
Location on western sidewalk of Apollo St., approximately 120 ft north of Norman; BP Amoco Terminal on opposite side of
Norman; WOLKOW Breaker roofing yard (storage of roofing materials) adjacent to SG-10; Corner building on Apollo and Norman
(western side of Apollo) appears to have AST (vent pipes on roof); PID hits coming from drill rods = 453 ppm
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Bentonite/Clay/Rubber glove tied over rod - tubing and clay
200 ml/min
30 sec note : Assuming 0.17" I.D. tubing purge 15 sec. for every 10 ft of tubing
2 E -2
Y
6 E -4
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-29.5
8:49 AM
9:23 AM
-4
Flow Regulator ID #
Sample ID #
A 462
FC 50
SG-10
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
9:23 AM
TO-3
Meter ID #
Meter 1
3343
NM
NM
462
%
%
ppm
Meter 2
04102/R5268
16.0
0.4
340
%
%
ppm
Date: 9/27/2005
Weather : sunny, upper 70's
Temperature:
Wind Magnitude:
Time:
71.1 F
6.9 mph
29.95 in
11:30 AM
Humidity:
Falling / Rising
47%
Location is on eastern sidewalk of Sutton St., approximatey 10 ft west of fenced in parking lot (next to residence 68 Sutton)
approximately 5 ft from curb; residence has basement (not basement apartment)
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Clay/Nitrile glove
174 ml/min
1 E -2
Y
3 E -4
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-3030.0
11:44 AM
12:21 PM
-3.5
Flow Regulator ID #
Sample ID #
A 291`
FC 173
SG-11
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
12:21 PM
TO-3
Meter ID #
Meter 1
03443/R5118
5.0
16.6
29.2
%
%
ppm
Meter 2
04102/R5268
5.2
16.4
2.0
%
%
ppm
Date: 9/26/2005
Time:
8:00 AM
Weather : cloudy, high of 80, chance of thunderstorms
Temperature:
72.0 F
Humidity:
Wind Magnitude:
4.6 mph
29.97 in
Falling / Rising
76%
Eastern sidewalk on Morgan St., 90 ft south of Nassau; approximately 5 ft west of fenced backyard (Lyric Lounge);
approximately 6 ft east of curb; residential building across the street; vent line from storage tank to approximately 15 ft
south, adjacent to residence; basement in commercial building (Lyric Lounge) approximately 35 ft north
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Clay/Latex glove
185 ml/min
1 min note : Assuming 0.17" I.D. tubing purge 15 sec. for every 10 ft of tubing
1 E -2 ml/sec
Y
0 E -5
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-27.8
9:39 AM
10:14 AM
-3.2
Flow Regulator ID #
Sample ID #
A 313
FC 191
SG-12
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
10:14 AM
TO-3
Meter ID #
Meter 1
03443/R5118
> 5.0
13.9
340
%
%
ppm
Meter 2
04102/R5268
6.2
14.0
22
%
%
ppm
Date: 9/19/2005
Time:
9:30 AM
Weather : sunny, 73, high of 85
Temperature:
73 F
Humidity:
Wind Magnitude:
3 mph
Wind Direction: NW
30.22
Falling / Rising
57%
Adjacent to RW-A (4000 gal UST) location; approximately 4 ft east of MW-15; no residential structures next to sampling
location
Y
Sampling Depth:
7-8'
Y
Bentonite and clay
Purge Rate:
163 ml/min
Purge Time:
Helium Rate at enclosure: 2 E -1 (0.2 ml/sec)
Y
0.03
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-28.0
10:23 AM
11:02 AM
-3.0
Flow Regulator ID #
Sample ID #
A 480
FC 171
SG -13/8
Analysis
Y
in. of Hg
in. of Hg
Time
TO-15 VOCs
TO-3 Methane
Meter ID #
Meter 1
R5268
0.0
19.7
7
%
%
ppm
Meter 2
R5269
0.0
20.9
0
%
%
ppm
Date: 9/22/2005
Weather :
Temperature:
Wind Magnitude:
Time:
82.0 F
6.9 mph
30.09 in
12:10 PM
Humidity:
Falling / Rising
30%
Location is approximately 3 ft from fence along Siegel Bros. Warehouse's building wall; building vent is approximately 10 ft from
sampling location and approximately 8 ft above ground
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Bentonite/Clay
~ 0.2 L/min
1 E -1
Y
6 E -4
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-32.0
12:10 PM
12:53 PM
-2.0
Flow Regulator ID #
Sample ID #
A 253
FC 161
SG-14
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
12:53 PM
TO-3
Meter ID #
Meter 1
3343
NM
NM
6
%
%
ppm
Meter 2
04102/R5268
2.7
16.9
3.9
%
%
ppm
Date: 9/27/2005
Temperature:
Wind Magnitude:
Time:
75.0 F
8.1 mph
29.94 in
1:30 PM
Humidity:
Wind Direction: NE
Falling / Rising
43%
Location is on eastern sidewalk of Sutton Street in front of 48 Sutton (residence) basement (not living space); approximately
11 ft from building wall, approximately 4 ft from curb; tank vent pipe at 48 Sutton (coming from basement) approximately
25 ft from SG-15
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Cement/Clay glove
157 ml/min
2 E -2
Y
1 E -4
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-30.0
1:50 PM
2:28 PM
-3.5
Flow Regulator ID #
Sample ID #
A 259
FC 184
SG-15
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
2:28 PM
TO-3
Meter ID #
Meter 1
04102/R5118
0.45
19.2
16
%
%
ppm
Meter 2
R5268
0.6
19.0
NM
%
%
ppm
Date: 9/22/2005
Weather :
Temperature:
Wind Magnitude:
Time:
82.9 F
5.8 mph
29.99 in
1:40 PM
Humidity:
Falling / Rising
32%
Residential area - houses with basements; sampling location is approximately 2.5 ft from curb and approximately 8 ft from
residential steps; sampling point is approximately 10 ft from MW-31 (north of well); strong vapors are coming from MW-31
(can be smelled periodically at SG-16 location); checked with PID: 100 - 200 ppm after J-plug and manhole cover were
back in place
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Bentonite/Clay
165 ml/min
3 E -3
Y
0 E -5
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-30.0
3:42 PM
4:20 PM
-3.6
Flow Regulator ID #
Sample ID #
A 336
FC 115
SG-16
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
4:20 PM
TO-3
Meter ID #
Meter 1
04102/R5268
0.2
20.4
2.9
%
%
ppm
Meter 2
3443
NM
NM
3.4
%
%
ppm
Date: 9/22/2005
Weather :
Temperature:
Wind Magnitude:
Time:
73.9 F
6.9 mph
30.12 in
9:10 AM
Humidity:
Falling / Rising
48%
Location adjacent to GT Rentals Warehouse, approximately 8 ft from garage door; siamese connection with vent below;
water and gas main manholes are approximately 12 ft to the west
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
0.2 L/min
1/0/00
Y
9 E -4
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-27.8
9:33 AM
10:04 AM
-3.1
Flow Regulator ID #
Sample ID #
A 470
F 124
SG-17
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
10:04 AM
TO-3
Meter ID #
Meter 1
50112/R5269
0.0
16.6
0.2
%
%
ppm
Meter 2
10881/R5268
0.2
18.5
10
%
%
ppm
Date: 9/23/2005
Time:
11:50 AM
Weather : sunny, high 85, humid
Temperature:
82.0 F
Humidity:
Wind Magnitude:
6.9 mph
Wind Direction: WNW
29.97 in
Falling / Rising
51%
(Ambient sample 10 ft north of SG-18); sampling point 140 ft north of Meeker on Van Dam; eastern sidewalk approximately
6 ft from curb and approximately 10 ft from business John's Truck Parts; across the street from private residences
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Bentonite glove
183 ml/min
4 E -3
Y
0 E -5
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-27.0
12:04 PM
12:28 PM
-0.8
Flow Regulator ID #
Sample ID #
A 285
FC 62
SG -18
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
12:28 PM
TO-3
Meter ID #
Meter 1
03443/R5268
2.0
18.1
5.1
%
%
ppm
Meter 2
04102/R5118
2.05
18.1
3.4
%
%
ppm
Date: 9/26/2005
Weather : overcast, 80
Temperature:
Wind Magnitude:
Time:
78.1 F
5.8 mph
29.82 in
1:45 PM
Humidity:
Falling / Rising
62%
Eastern sidewalk of Morgan St.; between 568 and 570 Morgan St. in dirt patch approximately 3 ft from curb; residential
buildings with basements; tank vent pipe in basement of 570 Morgan, approximately 12 ft from sampling point
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Plastic wrap/Latex glove
160 ml/min
7 E -3
Y
0 E -5
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-29.2
2:15 PM
2:53 PM
-1.9
Flow Regulator ID #
Sample ID #
A 098
FC 113
SG-19
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
2:53 PM
TO-3
Meter ID #
Meter 1
04102/R5118
> 5.0
10.5
6
%
%
ppm
Meter 2
03443/R5268
11.5
8.2
52
%
%
ppm
Date: 9/27/2005
Time:
Weather : partly cloudy, low 70's, high in upper 70's
Temperature:
64.9 F
Humidity:
Wind Magnitude:
10.4 mph
Wind Direction: WNW
29.87 in
Falling / Rising
68%
Western sidewalk of Vandervoort Ave., approximately 25 ft south of Anthony St.; approximately 10 ft west of curb,
approximately 6 ft to fence around "Stone Depot" storage yard (stone slabs stored here); no basement, tanks, vent pipes
in area
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Clay/Latex glove
161 ml/min
1 E -2 ml/sec
Y
0 E -5
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-32.0
7:35 AM
8:16 AM
-3.5
Flow Regulator ID #
Sample ID #
A 464
FC 145
SG-20
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
8:16 AM
TO-3
Meter ID #
Meter 1
04102/R5268
2.8
10.0
7.8
%
%
ppm
Meter 2
03443/R5118
2.75
9.3
8.0
%
%
ppm
Date: 9/23/2005
Time:
1:20 PM
Weather : partly cloudy, high of 85, humid
Temperature:
84.9 F
Humidity:
Wind Magnitude:
10.0 mph
29.96 in
Falling / Rising
46%
Loation on eastern sidewalk; cobblestone driveway to south; concrete to north in front of 666 Morgan St.; warehouse
approximately 7 ft from SG-2, wicj is approximately 10 ft from curb; vent pipe in building wall (sewer?)
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
165 ml/min
1 E -2
Y
0 E -5
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-28.0
1:50 PM
2:29 PM
-1.0
Flow Regulator ID #
Sample ID #
A 265
FC 193
SG-21
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
2:29 PM
TO-3
Meter ID #
Meter 1
04102/R5118
> 5.0
11.4
42.3
%
%
ppm
Meter 2
0.443/R5268
8.4
12.0
47.2
%
%
ppm
Date: 9/27/2005
Temperature:
Wind Magnitude:
Time:
66.0 F
5.8 mph
29.92 in
Humidity:
Falling / Rising
59%
Eastern sidewalk on Hausman St.; approximately 50 ft north of Meeker; location is approximately 4 ft from curb;
approximately 11 ft from "Meeker Heat and Grocery" stockroom; basement for storage; residential buildings across
the street
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
Cement/Clay/Nitrile glove
199 ml/min
3 E -2
2 E -3
Y
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-30.0
9:41 AM
10:22 AM
-3.0
Flow Regulator ID #
Sample ID #
A 443
FC 174
SG-22
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
10:22 AM
TO-3
vapor shall be screened with duplicate meters to verify the results. If inconsistent results are obtained, calibrate both meters
again and if it persists move the soil vapor sampling point to another location
Meter 1
Meter ID # 03443/R5118
> 5.0
0.0
80.8
%
%
ppm
Meter 2
04102/R5268
11.6
0.6
29.4
%
%
ppm
Date: 9/26/2005
Time:
11:00 AM
Weather : overcast, high 80, possible thunderstorms in afternoon
Temperature:
75.0 F
Humidity:
Wind Magnitude:
9.2 mph
Wind Direction: South
29.89 in
Falling / Rising
71%
Location in front of 590 Morgan St. (eastern sidewalk of Morgan) approximately 6 ft from residential property fencing;
residences with basement apartments; tank vent pipe coming from neighboring property basement (588 Morgan)
approximately 25 ft from sampling point
Sampling Depth:
Purge Rate:
Purge Time:
Y
7-8'
Y
6/27/00
2 E -2
Y
1 E -4
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
-28.9
12:10 PM
12:55 PM
-3.2
Flow Regulator ID #
Sample ID #
A 172
FC 136
SG-23
Analysis
TO-15
Y
in. of Hg
in. of Hg
Time
12:55 PM
TO-3
Meter ID #
Meter 1
03443/R5268
0.2
20.1
189
%
%
ppm
Meter 2
04102/R5118
0.6
19.3
12.1
%
%
ppm
Date: 9/22/2005
Weather :
Temperature:
Wind Magnitude:
Time:
82.0 F
6.9 mph
30.09 in
12:10 PM
Humidity:
Falling / Rising
30%
Sampling Location: Ambient 14
Location is approximately 6 ft from SG-14, next to fence along building wall of Siegel Bros. Warehouse; building vent
is approximately 15 ft from sampling location, approximately 8 ft above ground
Sampling Depth:
Purge Rate:
Purge Time:
Y/N
Y/N
Y/N
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
Flow Regulator ID #
Sample ID #
-30.0
12:10 PM
12:51 PM
-1.5
A 469
FC 100
Ambient 14
Y
in. of Hg
in. of Hg
Time
12:51 PM
TO-15
Analysis
TO-3
Meter 1
Meter ID #
Meter 2
%
%
ppm
%
%
ppm
Date: 9/22/2005
Weather :
Temperature:
Wind Magnitude:
Time:
82.9 F
5.8 mph
29.99 in
1:40 PM
Humidity:
Falling / Rising
32%
On stoop of residence #60 Hausmann, approximately 9 ft from sample location SG-16; 25 ft south of SG-16 (upwind
of Mw-31)
Sampling Depth:
Purge Rate:
Purge Time:
Y/N
Y/N
Y/N
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
Flow Regulator ID #
Sample ID #
-28.5
3:42 PM
4:21 PM
-2.6
A 303
FC 83
Ambinet 16
Y
in. of Hg
in. of Hg
Time
4:21 PM
TO-15
Analysis
TO-3
Meter 1
Meter ID #
Meter 2
%
%
ppm
%
%
ppm
Date: 9/23/2005
Time:
11:50 AM
Weather : sunny, high 85, humid
Temperature:
82.0 F
Humidity:
Wind Magnitude:
6.9 mph
Wind Direction: WNW
29.97 in
Falling / Rising
51%
Location on Van Dam, 150 ft north of Meeker; eastern sidewalk approximately 3 ft from curb; 10 ft north of SG-18
Sampling Depth:
Purge Rate:
Purge Time:
Y/N
Y/N
Y/N
Starting Pressure:
Starting Time:
Ending Time:
Ending Pressure:
Flow Regulator ID #
Sample ID #
-30.0
12:06 PM
12:43 PM
-3.7
A 234
FC 168
Ambient 18
Y
in. of Hg
in. of Hg
Time
12:43 PM
TO-15
Analysis
TO-13
vapor shall be screened with duplicate meters to verify the results. If inconsistent results are obtained, calibrate both meters
again and if it persists move the soil vapor sampling point to another location
Meter 1
Meter ID #
Meter 2
%
%
ppm
%
%
ppm

Soil Vapor Investigation Report: Greenpoint, Brooklyn

Transcripción

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