air and soil gas sampling survey - 10/19/1992 and … · 2020. 8. 27. · o. air and soil gas...

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AIR AND SOIL GAS SAMPLING SURVEY ROSE HILL REGIONAL LANDFILL SITE SOUTH KINGSTOWN, RHODE ISLAND

OCTOBER 19 AND 20,1992

Prepared For:

U. S. Environmental Protection Agency Emergency Planning and Response Branch

60 Westview Street Lexington, Massachusetts 01273

CONTRACT NO. 68-WO-0036

TDD NO. 01-9210-33

PCS NO. 4033

DC NO. Ol-N-01196

Prepared By:

ROY F. WESTON, INC. Technical Assistance Team

Region I

OO November 1992

TABLE OF CONTENTS

PAGE

List Of Figures iii

List Of Appendices iv

1.0 Site History 1

2.0 Project Background 1

3.0 Sampling Objective 3

4.0 Sampling Methodologies 3

4.1 Air Monitoring 5 42 Field Analysis Using Gas Chromatograph 5 43 Gas Canister Sampling 7

5.0 Responsibilities 7

6.0 Deliverables 8

11

LIST OF FIGURES

PAGE

1. Site Location Map 2

2. Site Diagram 4

in

LIST OF APPENDICES

Appendix A

Appendix B

Appendix C

Appendix D

Appendix E

Real-Time Air Monitoring Data

NERL Vinyl Chloride Field Screening Results Memorandum

NERL VOC Field Screening Results Memorandum

Gas Canister Chain-of-Custody Records

NERL Canister Air Sampling Procedures Memorandum

IV

1.0 SITE HISTORY

The Rose Hill Regional Landfill site is located on Rose Hill Road in South Kingstown, Rhode Island (Figure 1 - Site Location Map). The landfill began solid waste disposal operations in 1967. In 1977, the landfill started accepting wastewater treatment plant sludge, and in 1978 bulk waste. The entire landfill was closed in 1983 after reaching the state permitted maximum capacity.

This site is a former gravel quarry partly owned by the Town of S. Kingstown and Edward Friseila, a private citizen. The Rose Hill Regional Landfill covers approximately 70 acres. Twenty-eight acres were used for solid waste disposal, 11 acres for bulk waste disposal and an undetermined number of acres for sewage sludge disposal During construction of an on-site transfer station from May to October 1982, the bulk waste area also accepted solid waste.

The Rhode Island Department of Environmental Management (RI DEM) discovered in 1979 that volatile organic compounds (VOCs) had been buried in drums in the solid waste section of the landfill. Mitchell Brook, which runs through the site, was found to be of contaminated with VOCs in 1982. In 1985, the town added eight residential dwellings and the transfer station to the municipal water supply in response to the threat contaminated groundwater in the immediate vicinity.

The Rose Hill Regional Landfill site was placed on the National Priorities List (NFL) by the U.S. Environmental Protection Agency (EPA) on November 4, 1989. A remedial investigation and feasibility study (RI/FS) of the landfill is being conducted by the EPA Region I Waste Management Division (WMD) Rhode Island Superfund Section. Metcalf and Eddy, Inc., who was contracted by the WMD, installed permanent soil gas sampling points around the landfill, and conducted a soil survey within the perimeter of the landfill. By June 1991, two rounds of soil gas sampling had been completed by Metcalf and Eddy, Inc. and the presence of combustible gases in residential dwellings abutting the landfill were detected. The groundwater in the area lias been effected, and therefore municipal water has been extended to most of the residents in the vicinity.

2.0 PROJECT BACKGROUND

The EPA WMD is currently performing the RI/FS to determine the nature and extent of contamination and determine appropriate actions. However, due to concern for off-site migration of landfill gases, the EPA Emergency Planning and Response Branch (EPRB), performed a removal assessment On November 15,1991, personnel from the EPA EPRB, Roy F. Weston, Inc., Technical Assistance Team (TAT), EPA WMD, and the South Kingstown Fire Department monitored 12 dwellings outside the landfill perimeter for the presence of combustible gases. During this monitoring event, several residential properties were found to contain concentrations of methane above background. From December 1991 to March 1992, TAT members conducted monthly monitoring surveys in the area. Bi-weekly combustible gas monitoring visits resumed in July 1992 after review of the monthly data. The methane gas is suspected to be migrating underground from the solid waste section of the landfill westerly towards Rose Hill Road.

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FIGURE 1

SITE LOCATION MAP

ROSE HILL REGIONAL LANDFILL

SOUTH KINGSTOWN, Rl

The air monitoring data indicate that methane has penetrated several residential basements located on the west side of the road (Figure 2 - Site Diagram). The air monitoring surveys indicated readings of up to 1,000 parts per million (ppm) from an Organic Vapor Analyzer (OVA) flame ionization detector inside one basement (220 Rose Hill Road). In addition, readings greater than 1,000 ppm were detected in the outdoor foundation point at the home located at 320 Rose Hill Road.

No vinyl chloride has been detected in the dwellings to date. However, based on gas canister air sampling, vinyl chloride has been detected in the residential area. Vinyl chloride was detected at a concentration of 4,000 ppm from an air sample collected on September 2,1992 from the permanent soil sample point LFGR-8, approximately 100 feet west of the landfill This soil gas point is approximately 150 feet from the closest dwelling. Other contaminants detected from this soil gas point included: 30 ppm toluene, 10 ppm chloroethane, 10 ppm 1,1 dichloroethane, 1.6 ppm benzene, 3.1 ppm ethyl benzene, 3.1 ppm xylene, and other volatile organic compounds. The presence of vinyl chloride at LFGR-8 was confirmed on September 28, 1992, with Drager tube readings of 1,000 ppm.

No landfill gas vents or other off-gassing system are currently in place. The EPA EPRB is requesting assistance from the Army Corp of Engineers in addressing the migration of landfill gas off the site. Specifically, the EPA is in the process of requesting a design plan to prevent migration of methane, vinyl chloride and other airborne contaminants into nearby homes located on Rose Hill Road.

3.0 SAMPLING OBJECTIVE

Sampling and field screening activities were conducted on October 19 and 20, 1992 to determine the severity of the threat posed by migrating landfill gases to residences located to the Rose Hill Regional landfill, The weather on October 19, 1992 was cloudy in the morning with rain late in the day. The temperature was a high of 51 • F and a low of 38 * F. On October 20, 1992 it was cloudy with some rain. The temperature was a high of 51 *F and a low of 42'F. Air and soil gas samples were collected from existing permanent soil gas points, inside residential basements, and the outdoor ambient air. The samples were analyzed in the field for methane and non-methane organic compounds (NMOCs). The data will be reviewed at a later date to determine whether a correlation between methane levels and NMOC levels can be made. Air samples will also be collected in gas canisters and sent for laboratory analysis in order to confirm field analysis data.

4.0 SAMPLING METHODOLOGIES

Three portable gas chromatograph (GC) were used to collect data concerning the concentration of methane and NMOCs. Eleven gas canister air samples were collected for laboratory analysis. The locations were selected based on the results of the GC field screening. In addition, real-time air monitoring data was collected using a Century OVA flame ionization detector (OVA), an MSA Model 260 combustible gas indicator/oxygen meter (CGI), and Drager tubes for vinyl chloride detection.

• PERMANENT SAMPLE POINT

i SUSPECTED FENCE BACKFILL AREA

BOUNDARY

FIGURE 2 NOT TO SCALE

SITE DIAGRAM ROSE HILL REGIONAL LANDFILL SITE DfUXN DATE SOUTH KINGSTOWN, RHODE ISLAND LABONTE 10/28/92 4033F2B

DATE

01-9210-33

Drager tubes used included the 0.5/a vinyl chloride tube with a range of measurement of 0.5 to 3 ppm, I/a vinyl chloride tube with a range of measurement of 1 to 10 ppm or 5 to 50 ppm, and 100/a vinyl chloride tube with a range of measurement to be 100 to 3,000 ppm.

4.1 Air Monitoring

Ambient air was monitored for methane concentration, lower explosive limit (% T.F.T,), present oxygen, and vinyl chloride concentration using several real-time monitoring instruments. This preliminary field screening data was recorded to provide information on the samples prior to analyses, to compare the data with the analytical results and to ensure the health and safety of the personnel conducting the survey. The real-time air monitoring data is shown in a table in Appendix A.

42 Field Analysis Using Gas Chromatograph

Three portable GCs were used independently to analyze for methane, vinyl chloride, and other volatile organic compounds. Two Photovac GCs equipped with photoionization detectors (PID) were operated by EPA New England Regional Laboratory (NERL) personnel The Photovac 10S Plus GC, which was dedicated to vinyl chloride analysis, was equipped with a 10 meter potassium chloride/alumina oxide (KC1/A1O3) megabore column. This column was necessary in order to slow the compounds passing through the GC and to distinguish vinyl chloride from other VOCs. Concentrations of vinyl chloride were calculated using the external standard technique. The Photovac 10 A10 equipped with SE-30 column was used for volatile organic compound (VOC) screening. The EPA Region I, Ambient Air Grab Sample Analysis for VOC screening method was followed for field analysis.

Because a GC with a PID cannot effectively detect methane, a Micro Sensor Technology, Inc. EZ Chrom 200 GC with a thermal conductivity detector (TCD) was used to analyze for methane on site. Stephen Blaze and Maria Pueyo from Roy F. Weston, Lux, Response Engineering and Analytical Contract (REAC) in Edison, New Jersey operated this instrument

Air samples were collected in Tedlar bags from most of the existing permanent soil gas points for analysis by GC Information on the number and type of points sampled can be found in the table in Appendix A. Due to the reasons listed below, Tedlar bag air samples were not collected from the following points:

LFGR-10 Point was flooded. LFGR-12 Point was flooded. LFGR-14 Tubing was damaged. LFGT-8 Point was flooded. LFG-JF Point was flooded. LFG-LHR Point was flooded.

LFGF-6 Could not locate the point LFGF-9 Could not open lock

Some newly installed soil gas points were encountered, and were also sampled and added to the site diagram (Figure 2). In addition to permanent soil gas points, air samples were collected from inside every basement from 110 to 364 Rose Hill Road The address of each house where air was Rose Hill Road sampled is also shown in the table in Appendix A, this included 339A Rose Hill Road. No sample was collected from 339B Rose Hill Road due to its location and previous data indicating no gas detection. At 278 Rose Hill Road, restrictions were encountered sampling inside the basement due to commercial painting activities. (A Halloween pumpkin painting operation had created paint fumes and potential interferences with analysis). At 294 Rose Hill Road a propane leak in the water heater was detected.

Ambient air samples were also collected for GC field analysis from the command post This point was identified as BLK-1. The command post was located on the unpaved driveway located off Rose Hill Road across from 364 Rose Hill Road. Another ambient air sample LFGR-1BLK was collected at the northwest corner of the landfill near LFGF-1. (Note: there is currently no point name LFGR-1).

An ambient air sample as NG-Well was collected from a concrete dry well located in the woods north of the Frisella driveway and approximately 100 feet east of 349 Rose Hill Road. The well was approximately 3 feet in diameter, 4 feet in depth, and had a concrete cover. At the bottom of the well, there was fiberglass insulation and a 2-inch diameter black tube which appeared to extend eastward underground from the well

In order to sample each permanent soil gas point, the locked cap was removed from the PVC casing and the inner tubing was pulled out and the Teflon tape was removed. Prior to sampling, the points were monitored with an OVA and a CGL In attempts to monitor only for methane the OVA probe, equipped with a carbon filter to screen out NMOCs, was attached to the soil gas tubing using a connector tube.

After monitoring the soil gas point with the instruments, a soil gas sample was collected in a 1-liter Tedlar 231-series sample bag. This was done by placing the bag inside an air tight Pelican case and connecting the stainless steel fitting on the bag, onto the teflon tube connected to the case. On the outside of the case, this teflon tubing connected directly to the soil gas point tubing from the PVC casing. In order to provide a vacuum, a second tube (made of tygon) connected from the case to an SKC Airchek Sampler Model 224PCXR7 pump, set at 2 liters per minute. Once all connections were made, the pump was turned on for approximately 30-60 seconds or until the bag was full. The pump was then turned off, tubing disconnected, and the Tedlar bag was relinquished to the GC-TCD operators, and then the GC-PID operator.

The results of the GC-PID analyses are included in Appendix B - Vinyl Chloride and VOC Field Screening Results.

43 Gas Canister Sampling

On October 20, 1992 eleven gas canister air samples were collected for laboratory analysis. Nine of the canisters were sent to the EPA/TAT laboratory in Edison, New Jersey for volatile organic compound (VOC) analysis. These nine samples wUl then be submitted to a subcontracted laboratory for methane gas analysis. The other two samples were sent to NERL for VOC analysis because they were believed to have little or no VOC contamination. Copies of the chain-of-custody records are shown in Appendix C

The gas canister samples were collected by Peter Kahn, NERL Air Section. Details of the preparation and sampling technique are provided in Appendix D - Canister Gas Sampling Memorandum. The data generated by the analysis of the gas canister air samples will confirm readings of NMOCs registered by either of the GCs operated by NERL personnel The locations were selected by OSC Paul Groulx and ERT Chemist, Tom Pritchett based on the results of the GC screening. A gas canister air sample was collected from permanent soil gas point LFGR-8 in order to confirm sampling conducted on September 2, 1992. Gas canister air samples were also collected from permanent soil gas points LFGR-2, LFGR-8, LFGR-9, LFGR-11 and LFGR-16 along the west side of Rose Hill Road. Canisters were also collected from point LFGF-3, located on the north perimeter of the landfill, and point LFGT-2, located on the south perimeter of the landfill.

5.0 RESPONSIBILITIES

Peter Kahn of NERL Air Section coordinated the gas canister portion of the air sampling. This included preparing the canisters for sampling, collecting the samples, and preparing the chain-of-custody.

Scon Clifford, Senior Chemist at NERL, was responsible for operating the two GC-PIDs which analyzed vinyl chloride and VOCs.

The EPA On-Scene Coordinator (OSC), Paul Groulx provided overall direction to the Roy F. Weston, Inc., Technical Assistance Team (TAT) concerning project sampling needs, objectives and scheduling.

The Roy F. Weston, Inc. TAT task leader, Molly Elder was the primary point of contact with OSC Groulx. The task leader was responsible for the coordination of all tasks being conducted by all TAT members, including reports and deliverables. TAT members Stephen

LaBonte and Timothy Jones were involved in the survey. TAT conducted monitoring with the OVA, DrSger tubes and CGI, and collected air samples in Tedlar bags for GC analysis.

Thomas Pritchett, from the EPA ERT in Edison, New Jersey provided technical assistance to OSC Groulx, and overall direction to the field crews. Through ERT, Roy F. Weston/REAC was mobilized to operate the GC-TCD for on-site methane analysis. Stephen Blaze and Maria Pueyo from REAC operated the GC-TCD. Stephen Blaze will be responsible for submitting nine gas canisters to the EPA/TAT laboratory in Edison, New Jersey and then subcontracting a laboratory to analyze them for methane.

6.0 DELIVERABLE^

Prior to the sampling event, a sampling strategy was generated by TAT. This sampling report was prepared to document actual field practices. One roll of photographs was taken during the sampling event which included pictures of dwellings, select sample stations, and some sampling equipment A photodocumentation log has been prepared by TAT under separate cover. A gas canister sampling report, and a GC report of NMOC findings has been prepared by NERL. A report compiling the air monitoring data, gas canister data, GC-PID data and GC-TCD data has been prepared by REAC

8

APPENDIX A

Real-Time Air Monitoring Data

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APPENDIX B

NERL Vinyl Chloride Field Screening Results Memorandum October 26,1992

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION I

ENVIRONMENTAL SERVICES DIVISION 60 Westview Street, Lexington, MA 02173-3185

MEMORANDUM

DATE: October 26, 1992

SUBJ: Rose Hill Landfill, South Kingston, RI -"] Results for Vent and Air Samples

FROM: Scott Clifford Chemist

TO: Paul Groulx On-Scene Coordinator

Project Number 93009

Dates Samples Analyzed:

Analytical Procedure

SampJLes__submitted for analysis in mylar bags were anlayzed on a Tui StTovacr ffe Riiy53 l j jggjfe jKgpr S&Ijg equipped with a 10 meter

— KCL/ALO3 megabore column and a photoionization detector (PID) . Concentrations of vinyl chloride were calculated using the external standard technique.

Discussion

In many of the landfill gas samples analyzed, there were high levels of interfering compounds present, making the target 25ppb detection level of vinyl chloride difficult.

Vinvl Chloride Screening Results

Vinvl Chloride (ppb v/v, unless noted)

25UF

25UF

25UF

3,3OOF ppm

25UF

25UF

25UF

25UF

25UF

25UF

25UF

25UF

3 OF ^ 25UF

25UF

25UF interferences

9F

25UF

25UF

25UF

1,OOOUF

F - Data has been generated using field screening method. Analytes are tentatively identified and concentrations are quantitative estimates.

U - The material was analyzed for but was not detected. The associated numerical value is the field screening method quantitation limit.


Vinvl Chloride fppb v/v. unless noted)

1,OOOUF

25UF

2,OOOUF

5,300F

25UF

25UF

25UF

25UF

25UF

22OF ppm

25UF

580F

25UF

25UF

25UF

40F

25UF

25UF

25UF

25UF


U - The material was analyzed for but was not detected. The associated numerical value is the field screening method guantitation limit.


Vinyl Chloride Sample Number fppb v/v, unless notech

LFGR-18 25UF

LFGR-19 25UF

Cement Cover Gagne Well 25UF

LFGR-16SC 5,100F

LFGT-5 25UF interferences

LFGR-8 (SC-81) 2,300F ppm

LFGR-9 (SC-126) 220F ppm

LFGR-11 (SC-84) 27F ppm


U - The material was analyzed for but was not detected. The associated numerical value is the field screening method quantitation limit.

cc: Peter Kahn

APPENDIX C

NERL VOC Field Screening Results Memorandum October 26,1992

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY "REGION i ——

ENVIRONMENTAL SERVICES DIVISION 60 Westview Street, Lexington, MA 02173-3185

MEMORANDUM

DATE: October 26, 1992

SUBJ: Rose Hill Landfill, South Kingston, RI - HMSWISBRfflfWffCW Screening Results for Vent and Air Samples

FROM: Scott CliffordJctL^Chemist

TO: Paul Groulx On-Scene Coordinator

Project Number 93009

Analytical Procedure

Samples submitted for analysis in mylar bags were analyzed on a

Ambient Air Grab Sample Analysis for Volatile Organic Compounds screening method was followed for analysis. Concentrations of tentatively identified volatile organic compounds were calculated using the external standard technique.

Target Compounds and Detection Limits*

Compound Detection Limit (ppb v/vl

1,1-Dichloroethylene 15

1,2-Dichloroethylene isomer 15

Benzene 15

Trichloroethylene 15

Toluene 30

Tetrachloroethylene 30

Chlorobenzene 70

Ethylbenzene 70

m/p-Xylene 70

o-xylene 80

* For diluted samples, multiply by dilution factor for Detection Limit.

Discussion

In many of the landfill gas samples analyzed, there were a lot of co-eluting peaks which made identification of target compounds dichloroethylenes, chlorobenzene, ethylbenzene and xylenes especially difficult. All compound identifications are tentative and quantitation is approximate.

Volatile organic compound Results Tentatively Identified Compounds and Approximate Concentrations

Sample Number Dilution Factor

LFGF-8

LFGF-5

LFGF-7

LFGF-3 40x

LFGF-4

LFGF2B 40x

LFGF-2A 40x

LFGR-1

LFG-NG

LFGR-4

294 Basement

Gagne Basement

Results in ppb v/v

TCE - 550F

ND

Toluene - 50F

Toluene - 7,500F Dichloroethylenes present

TCE - 160F Toluene - 12OF C,CL4 - 5OF Dichloroethylenes present; unidentified peaks present

TCE - 3,800F Dichloroethylene present

TCE - 3,800F Dichloroethylene present

Toluene - 3OF

ND

ND

ND

Toluene - 30F


Sample Number

LFGF-1

320 Basement

LFG-GT

LFGR-2

LFGR-5N

278 Basement

LFGR-9

LFGR-21

LFGR-23

220 Basement

LFG-RK

110 Basement

LFG-AD

LFG-RK

LFG-ET

Dilution Factor Results in ppb v/v

Toluene - 3OF

ND

ND

TCE - 3OF Toluene - 60F unidentified peaks present

ND

Toluene - 23OF m/p Xylene - 7OF unidentified peaks present

Toluene - 4OOF C2CL4 - 8OF many unidentified co-eluting peaks; possible benzene, TCE, xylenes, dichloroethylenes

unidentified peaks present (low)

ND

ND

ND

ND

unidentified peak present

Toluene - 3OF

TCE - 4OF Toluene - 170F


Sample Number

LFGR-11

LFGR-5S

LFGR-20

LFGR-3

LFGR-7

LFGR-6

LFGR-LHR

LFGR-13

294-SC (SC-100)

220-SC (SC-87)

121-BSM

BLK-1

LFG-JB

LFGT-3

LFGT-5

364BSM

Dilution Factor

lOx

40X

2X

40x

2X

Results in ppb v/v

Toluene - 480F unidentified peaks present

Toluene - 120F Benzene - 7OF TCE - 3 OF unidentified peaks present

Toluene - 60F

Toluene - 50F

Toluene - 5,2OOF unidentified peaks present

Toluene - 50F

Toluene - 50F

Toluene - 860F unidentified co-eluting peaks present

ND

ND

ND

ND

ND

Toluene - 1,3OOF unidentified peaks present


ND


Sample Number Dilution Factor Results in ppb v/v

LFGT-2 (SC-129) 4x

220-SBP

121-SBP

LFG-AD (SC-117)

LFGT-1 4x

LFGR-2 (SC-40)

LFGR-3R

LFGT-7

LFGT-6

LFGR-15

LFGR-6R

LFGR-8 2Ox

LFGR-17 4x

Benzene 200F Toluene 370F unidentified co-eluting peaks; possible Dichloroethylenes, xylenes present

ND

ND

unidentified peak present; possible low TCE (lOppb)

Toluene - 400F unidentified co-eluting peaks; possible xylenes, Dichloroethylenes

Toluene - 40F TCE - 2OF unidentified peak present

ND

Toluene - 60F

Toluene - 90F

Toluene - 4OF

ND

Toluene - 6,4OOF m/p xylene - 1,OOOF TCE - 2,100F high unidentified co-eluting peaks


F - Data has been generated using field screening method.

Analytes are tentatively identified and concentrations are quantitative estimates.

Sample Number Dilution Factor

LFGR-16 SC 4x

LFGR-18

LFGF-3SC 40x (SC-80)

LFGR-11 (SC-84) 8x

Cement Cover Gagne Well

LFGR-19

LFGR-9 (SC-126) 2X

LFGT-4 8x

Results in ppb v/v


Toluene - 4OF

Toluene - 7,3OOF large co-eluting unidentified peaks; possible Dichloroethylenes

Toluene - 590F Benzene - 430F unidentified peaks present; possible Dichloroethylenes

Toluene - 50F

Toluene - 40F

Benzene - 130F Toluene - 340F unidentified co-eluting peaks present; possible Dichloroethylenes



cc: Peter Kahn

APPENDIX D

Gas Canister « hain-of-Custor Records

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APPENDIX E

NERL Canister Air Sampling Procedures Memorandum November 9,1992

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

REGION I ENVIRONMENTAL SERVICES DIVISION

60 WESTVIEW STREET, LEXINGTON, MASSACHUSETTS 02173-3185

[ORANDUX

DATE: November 9, 1992

SUBJECT: October 20, 1992, Canister Air Sampling Rose Hill Landfill, South Kingstown, RI

FROM: Peter R. Kahn, Environmental Engineer/ EMA-LEX

TO: Paul Groulx, OSC EER-LEX

The following describes the procedures used to prepare the canisters prior to the survey and the procedures used to collect both soil gas and indoor air canister samples:

For this project ESD received 12, 6 liter Andersen canisters, from the EPA Environmental Response Team (ERT) in Edison, NJ. We received these canisters tagged "certified clean". However, the date of certification was approximately 6 - 8 months old. Therefore, all 12 canisters were cleaned, leaked checked, and evacuated to less than 5 Torr following the Region I ESD SOP. This procedure was performed in order to ensure the canisters were free of contamination prior to the October 19 and 20 survey.

One of the 12 canisters, canister #90, was used to prepare a VOC gas standard that contained a known concentration of vinyl chloride. This was used in the field to generate a standard chromatograph for vinyl chloride using a Photovac 10A10 portable GC.

Canisters #87 and #100 were used to collect indoor air grab samples from residential basements located at 220 Rose Hill Road and 294 Rose Hill Road, respectively. These samples were collected by opening the canister valve, which allowed the sample to be directly drawn into the canister until the internal canister pressure reached atmospheric pressure. The length of time to collect a sample using this process was less than 1 minute. At 294 Rose Hill Road, canister #100 was collected on October 20, 1992, at 0842 hours in the center of the basement

-2

approximately 2 feet above the floor. At 220 Rose Hill Road, canister #87 was collected on October 20, 1992, at 0852 hours near the east wall approximately 2 feet above the floor. These samples were logged into the ESD laboratory on October 21, 1992, and will be analyzed for the VOCs appearing on Table 1 using the laboratory's GC/MS.

The canister samples described below will all be analyzed by ERT for VOCs and permanent gases. The following table describes the canister's used to collect soil gas samples on October 20, 1992:

CANISTER NUMBER

91

117

40

81

126

84

129

80

96

SAMPLE NUMBER

220-SBA-SC

LFG-AD-SC

LFGR-2-SC

LFGR-8-SC

LFGR-9-SC

LFGR-11-SC

LFGT-2-SC

LFGF-3-SC

LFGR-16-SC

SAMPLE TIME (HOURS)

1150

1210

1234

1308

1315

1325

1058

1522

1442

LOCATION

220 Rose Hill Road Slam Bar/ Probe

278 Rose Hill Road Soil Gas Sampling Well #LFG-AD

Soil Gas Sampling Well #LFGR-2




Soil Gas Sampling Well #LFGT-2

Soil ~as Sampling Well #LFGF-3


-3

The canister samples collected from the soil gas sampling wells described in the table were all collected by inserting the teflon soil gas sampling line from the well into the canisters "swageloc" fitting. This provided a tight seal so that ambient air would not be drawn into the canister during soil gas sampling. After the connection was completed, the samples were collected by opening the canister valve, which allowed the sample to be directly drawn into the canister until the internal canister pressure reached atmospheric pressure. The length of time to collect a sample using this process was less than 1 minute. Prior to collecting a canister sample, a bag sampler with a 1 liter tedlar bag was used to obtain a soil gas sample that was immediately analyzed on-site for vinyl chloride, VOCs and permanent gases.

Canister sample #220-SBA-SC was collected using a different technique than that used for collecting samples from the soil gas sampling wells described above. To collect this sample, a 1/2 inch diameter steel rod (slam bar) was driven into the ground to a depth of approximately 2 - 4 feet and then carefully withdrawn to prevent the hole from collapsing. A 5/16 inch diameter copper tube, with a "T" fitting on the end, was inserted into the hole. Soil was then used to form a tight seal at the point where the copper tube exits the ground. Prior to collecting the canister sample, a bag sampler with a 1 liter tedlar bag was used to obtain a soil gas sample that was immediately analyzed on-site for vinyl chloride, VOCs and permanent gases. After collecting the bag sample, the canister's "swagelok" fitting was immediately connected to the so;., gas probe "T" fitting and the canister valve opened. This allowed the sample to be directly drawn into the canister until the internal canister pressure reached atmospheric pressure. The length of time to collect a sample using this process was less than 1 minute.

If you have any questions, please feel free to contact me at 860-4392.

TABLE 1

SELECTED VOCS DSIHG THE CANISTER METHOD

Chloromethane Vinyl Chloride Bromomethane Chloroethane Trichlorofluoromethane Acetone 1,1-Dichlororethene Acetonitrile Methylene Chloride Acrylonitriletrans-1,2-Dichloroethene 1,1-Dichloroethane Methyl Ethyl Ketone 2,2-Dichloropropane cis-l,2-Dichloroethene Ethyl AcetateChloroform Bromochloromethane Tetrahydro furan 1,1,1-Trichloroethane 1,1-DichloropropeneCarbon Tetrachloride Benzene 1,2-Dichloroethane Trichloroethene 1,2-Dichloropropane Bromodichloromethane D ibromomethane Methyl Isobutyl Ketone Toluene 1,1,2-Trichloroethane 1,3-Dichloropropane

Tetrachloroethene Dibromochloronethane 1,2-Dibromoethane Chlorobenzene 1,1,1,2-Tetrachloroethane EthylbenzeneBromofonn p,m-Xyleneso-XyleneStyrene1,1,2,2-Tetrachloroethane 1,2,3-Trichloropropanen-PropyIbenz ene Isopropylbenzene Bromobenzene 1,3,5-Trimethylbenzene 2-Chlorotoluene 4-Chlorotoluene tert-Butylbenzene1,2,4-Trimethylbenzene sec-ButyIbenz ene p-Isopropyltoluene 1,3-Dichlorobenzene 1,4-Dichlorobenzene n-Butylbenzene1,2-Dichlorobenzene 1,2-Dibromo-3-chloropropane1,2,4-Trichlorobenzer.7 Hexachlorobutadiene Naphthalene1,2,3-Trichlorobenzene

air and soil gas sampling survey - 10/19/1992 and … · 2020. 8. 27. · o. air and soil gas...

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