NCD095458527_20080620_FCX Inc. (Statesville)_FRBCERCLA RA_Soil Vapor Intrusion Investigation Work Plan OU-3-OCR

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SOIL VAPOR INTRUSION
INVESTIGATION WORK PLAN FOR
N.B. MILLS ELEMENTARY SCHOOL,
STATESVILLE, NORTH CAROLINA
FCX-STATESVILLE SUPERFUND
SITE OU3
Prepared for
El Paso Natural Gas Company
June 2008
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SOIL VAPOR INTRUSION INVESTIGATION WORK PLAN FOR
N.B. MILLS ELEMENTARY SCHOOL, STATESVILLE, NORTH CAROLINA
FCX-STATESVILLE SUPERFUND SITE OU3
Prepared for
El Paso Natural Gas Company
June 2008
8 ROW N AND CA° L D W E L'L
501 Great Circle Road, Suite 150
Nashville, TN 37228
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~ -· ,,1 ::, ..• • ,: ·~.
'BROWN-AND
···cA-LiiwELL
• : j • '
501 Great Circle Road
Suite I 50
Nashville, TN 37228
Td, [phone]
Fn: [phone]
June 20, 2008
lvlr. McKenzie Mallary
North Site Management Branch
EPA Region 4
Atlanta Federal Center
61 Forsyth Street
1\ tlanta, GA 30303
RE: Soil Vapor Intrusion Investigation Work Plan for
N.B. Mills Elementary School, Statesville, NC
FCX-Statesville Superfund Site Operable Unit Three (OU3)
Dear Ken:
27-135571.001.002
Enclosed is the Work Plan entitled "Soil Vapor Intrusion Investigation Work Plan
for N.B. Mills Elementary School, FCX-Statesville Superfund Site OU3, Statesville,
North Carolina." This Work Plan presents the work proposed on tl1e N.l\. Mills
Elementary School property as part of tl1e ongoing vapor intrusion asscssmen t being
performed in conjunction with activities from the FCX-Statesville Supcrfund Site
OU3.
Please call me at [phone] or call Brian Johnson of El Paso Natural Gas
Company (EPNG) at [phone] if you have any questions or comments
regarding tl1e report.
Sincerely,
Brown and Caldwell
·-:;-1";;1 -y;71ff . )/1,-·I / /t:~/ :·-/2ffC t:t·f·yf{/~y-c{ '-------( ,/ .
M. Maria Megchee
Associate
Environmental Services
Janet McQuaid, EPNG cc: N. Testerman, NCDENR
Brian Johnson, EPNG J. Porter, Gurne Porter, PLLC
1':\Clicnts\1:-1 Paso\EPNl; FCX\J35571-5chnol Property Planning\ll(I\-IM\2 i\ssc.,smcnt l'lan\Schnol VIA \l.1)(,21Jll8-l\.falla[)'·Joc
Environmental Engineers & Consultants
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TABLE OF CONTENTS
I TRANSMITTAL LETTER
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CONTENTS ........... . . . . . . . • . . . . . . . . . . • . . . i
LIST OF TABLES ............................................................................................... .
LIST OF FIGURES ...................... . . .................. ii
1. INTRODUCTION ....................... . . .... ··········· ... 1-1 1.1 Project Background ....... . . .................... 1-1
1.2 Objectives ............ . ·····································1~
··············· ... 1-2 1.3 Work Plan Organization ............................................................................................. .
2. TECHNICAL APPROACH ................................... . ····································· 2-1 2.1 Temporary Piezometer Installation and Groundwater Sampling ................................... . ......... 2-1
2.2 Soil Gas Sampling Point Installation and Sampling. . ..... 2-2
2.3 Passive Soil Gas Sampling .............. . . .......... 2-2
2.4 Sub-slab and Indoor Air Sampling ........... . . ... 2-3
2.5 Laboratory Analyses and Quality Assurance/Quality Control (QA/QC) .... . . ... 2-3
3. DATA EVALUATION AND REPORTING ................................................................ . . ........ 3-1
3.1 Screening Levels for Soil Gas and Indoor Air ............................................... . . ... 3-1
4. LIMITATIONS .............................. . ······················· 4-1
TABLES ..... .
FIGURES ...... .
APPENDIX A .. .
Instructions for Using Gore™ Modules .. ··············A
APPENDIX B .......... . . ............. B
Example of an Indoor Air Survey .......... . ··········· B
APPENDIX C .......................................................................................................... . . ............ C
ASTM E2600-08 Table X7. Typical Background voe Concentrations ................................. . ··············c
BROWN ANO CALDWELL
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Table of Contents
LIST OF TABLES
2-1 Data Collection Approach for Soil Vapor Intrusion (SVI) Investigation
LIST OF FIGURES
1-1 Site Location Map
2-1 Proposed Sample Locations
BROWN AND CALDWELL
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Soil Vapor Intrusion Investigation Work Plan
FCX-Statesville Supertund Sile OU3
P,ICl1onls\EI Pas,,',EPNG FCX\135511-5<:hool Propeny Piann,rigOOl-002 Assessment P,an'&moi VIA'SVI Plan final 6 1103 doc
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SOIL VAPOR INTRUSION INVESTIGATION WORK PLAN
FCX-STATESVILLE SUPERFUND SITE OU3
1. INTRODUCTION
This work plan describes the proposed investigation plan to evaluate the potential for migration of vapors
from the subsurface into indoor air at tht,; N.13. Mills Elementary School in Statesville, North Carolina
(referred to herein as the Property). This work plan is consistent with the Vapor Intrusion Assessment (VIA)
that is being conducted in association with the former Burlington Industries lnc. textile plant located at 201
Phoenix Street (the "Site"), which is identified for USEPJ\ regulatory purposes as Operating Unit 3 (OU3) of
the FCX-Statcsvillc Supcrfund Site. OU3 is not othen.visc rdatcd to the FCX facility on \Y/. Front Street and
was n<.:ver a part of its operations. The plan has been prepared by Brown and Caldwell (BC) on behalf of
El Paso Natural Gas Company (EPNG) and in cooperation with the United States Environmental Protection
Agl'.ncy (USEPA) and Nonh Carolina Department of Environment and Natural Resources (NCDENR). The
following provides a brief project background, objectives, and organization for this work plan.
1.1 Project Background
The FCX-Statesville Superfund Sitl'. OU3 in Statesville, North Carolina and adjacent properties have been thl'.
subject of a series of investigations into releases of chlorinated hydrocarbons into various media including soil
and groundwater. The OU3 Site is located in Iredell County approximately 1.5 miles west of downtown
Statesville, North Carolina. The Site consists of a source area located beneath a portion of a formn textile
plant (plant building is approximately 275,000 SljUare fctt in size) and a groundwater plume extending ro the
north and south of the source area (sec Figure 1-1). The former textile plant prnpcrty is a 9.90 acre parcel
that is located on the west side of Phoenix Street.
Remediation work performnl at thc Sitc in late 2006 and early 2007 generated new data about the location
and distribution of Site-related contaminants. Thest new data indicated that pnlperties adjacent tr> this w<irk
area should be evaluated to assess the potential for volatile organic compounds (VOCs) in soil or
groundwater to migrate upwards into indoor air in structures adjacent to the Site. As a first step, the USEPA
Johnson and Ettinger U Ei\'1) model was uscd to L'.Stimate the potential for VOCs to migrate from
groundwater to indoor air. This model uses site-specific information, such as depth to groundwater,
concentrations of VOCs in groundwater, and the soil type between the groundwater and the enclosed space,
to derive a general and conservative understanding of the rotcntial for migration of soil gas to indoor air.
Based on the use of this model as an initial screening tool, USE.PA and EPNG agreed that soil gas and
groundwater samples should be collected to verify model results and to evaluate potential to impact adjacent
residential properties. This determination was further refined and it was dcciJcd that properties within I 00
feet of the 10 micrograms per liter (µg/ L) tetrachloroethent (PCE) plume contour line would be evaluated as
a first step. 1\ \111\ \'{1ork Plan entitled "Summary of Field Activities for Phase 11 Vapor lnrrusion
Assessment, FCX-Statl'.sville Supcrfund Site OU3, Statesville, North Carolina" was then prcparnl and
submitted to USEPJ\ in June 2007. The results of the VIA work in the summer of 2007 are included in the
report entitled "Vapor Intrusion 1\sscssment Report, FCX-Statesvillc Superfund Site OU.\ Statesville, North
Carolina" that was submitted to the USEl'A in April 2008.
Additional investigations have occurred in the winter months of 2007 and 2008. The results of these
1nvcst1gat1ons have been shared with individual property owners and will be included in a report to the
USEPA later this summer. A part of the winter investigation included sampling and analyzing soil gas
BROWN AND CALDWELL
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P.\ClientslEI Paso\EPNG FCX\1l5571-School Propeny Plam,ng\001-002 Assessment Planl&nool VIA\SVI Plan final 6 11 08 doc
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1: Introduction Soil Vapor Intrusion Investigation Work Plan
FCX-Statesville Superfund Site OU3
sampks colkctcd along the N. !\-tiller Street right-of-way which is on the west side of N.B. Mills Elementary
School. The purpose of the investigation was to determine if there were any Siw-related VOCs present in the
soil gas above USEPA risk-based screening kvds. The results of the investigation indicattxl that there wne
dctccmblc concentrations in some samples and that furthn invcsrigation was rccomrnenckd for the school
property. This work plan presents the proposed investigation based on the information that is known at this
time.
1.2 Objectives
Thc.: main objective of the investigation outlined in this work plan is to determine the conct:ntratiuns of any
Site-related VOCs in soil gas and indoor air in the immediate vicinity of the N.B. 1\lills Elementary School1
although Siw-related VOC:s have not been found in groundwater near the school property. However, VOes
have been found in soil gas during winter 2008 sampling along N. l\:liller Street, which was approximately 180
feet west of the school building. Although the specific source has not been determined for the VOC:s in soil
gas, EPNG has elected to do further charactcri:zation to establish conditions in the area of the school and to
determine if these detections may be related to releases from the OU3 Site. It is also possible that there is a
preferential pathway for VOCs in soil gas; there is an ongoing investigation at the Site which is evaluating the
sewer or utility lines as a potential preferential transport pathway.
This work plan has been de\·eloped to describe the data collection activities fur performing a soil vapor
intrusion investigation on the Property. This plan outlines sample collection for thL potc.:mial pai-hways of
voes that could contribute to indoor air issuLs: groundwater, deep soil gas, shallow soil gas, sub-slab soil
gas, indoor air, and ambient air. The plan also addresses possible transport pathways, including sewers.
1.3 Work Plan Organization
The \\1urk Plan is organi:zed as follows:
Section l .O
Section 2.0
Section 3.0
Secticm 4.0
J\pprndix J\
Appendix B
Appendix C
Introduction
'l\.:chnical Appn)ach
Dara Evaluation and Reporting
Limitaticins
Instructions for using GoreTM J\,Jodulcs
Exampk of an Indoor Air Survey
t\ST~I E2600 -08 Table X7. Typical Background VOC: Concentrations
1 This work plan uses the definitions for ''soil gas" and '·soil rnpor" used in the Interstate Technology & Regulatory
Council (ITRC) document entitled ''Vapor Intrusion Pathway: J\ Practical Guide" dated January 2007 (''ITRC: 2007").
The ITRC recognizes that "in many vapor intrusion guidance documents, 'soil gas' and 'soil \':tpor' arc used
interchangeably. In this document, 'soil gas' rc.:fcrs to the gaseous clements and compounds in the small spaces between
particles of soil. Once the gaseous clements or compounds migrate into a structure, they are referred to as 'vapor.' "
This work plan adheres to this same usage. ---------------BROWN ANO CALDWELL
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SOIL VAPOR INTRUSION INVESTIGATION WORK PLAN
FCX-STATESVILLE SUPERFUND SITE OU3
2. TECHNICAL APPROACH
This section describes the t<:chnical approach which includes the methodologies that will be used to perform
the work. Table 2-1 presents an overview of the investigation components, data collection ohjcclivcs,
approach, and number of proposed locations. Figure 2-l presents the proposed sample locations for the
samples included in Table 2-1. J\s noted earlier, this investigation includes sampling groundwater, soil gas,
sub-slab soil gas, indoor air, and ambient air. The field work will be conducted under the Health and Safety
Plan (l-11\SP) entitled "Site-Specific Health and Safety Plan for FCX-Statesville Superfund Site OUJ,
Statesville, North Carolina" dated January 2008. Sampling equipment will be dcxontaminared according m
methods in the project Quality t\ssurance Project Plan (Q1\PP). Decontamination acti\·ities will be contained
within temporary decontamination pads on-Site. \'Vaste generated during the sampling (i.e., purge water,
decontamination water, soil cutrings) will be contained on Site and dispose<l of appropriately as pc.:r the waste
handling procedures in Appendix I of the Phase I Design for 1\Nt\.
The following sections present the approach and methods that will be followtxl while performing the
invesnganon.
2.1 Temporary Piezometer Installation and Groundwater
Sampling
Six temporary or semi-permanent piezometers will be installed. These sampling points will allow for data
collection and evaluation consistent with other investigations that have been performed in the vicinity
including residences and unimproved propertii.;s. Installation of these points would allow for future samplL
collLction if it \Vere desirable to perform winter sampling or even long-term monitoring. Installation of these
points will kave a visibk sample location in the yard area of the school grounds; the points ,viii need to be
abandoned in the future which would rt:quire an additional mobilization to the school.
Prior to any subsurface invt:stigation, tht: North Carolina One-Call center will be notified as well as a private
utility locator to mark underground utilities at the proposed drilling locations. Six l-inch diameter temporary
PVC piczometers with 5 feet of 10-slnt PVC screen will be installed at the locations identified on Figure 2-1.
Steel rods threaLkd to a macro corc barrel will be advanced and litholot,'Y described from within thc macro
core liners. The PVC screen flush threaded to PVC riser casing will be placed in the open hole cri.;atcd by thi.;
drill rods. Filter sand pack will be placed to approximardy 6 inches to I foot above the top of the screen with
granular bentonite filling the rest of the borchole space around the PVC riser. Tht: soil gas point and
piezometLr surface completions will consist of flushmount I-foot by I-foot concrete pads with 5-inch
manhole covns.
The piezumi.;ters will be allowed to ec1uilibratc for approximately 24 hours bcforL sampling. A disposable
bailer or peristaltic pump will be.: used to purge thL casing before collecting groundwater samples for VOC
analysis. Field parameters such as pH, specific conductivity, and tcrnpcrature will be colkcti.;d if tht:re is
sufficient \·olurne in the piezornerer.
---------------BROWN AND CALDWELL
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P:ICl1ents\EI Paso\EPNG fCX\135571-School Property Plaru,11191()01-002 Alse,;,;menl Plan\School VIAIS\11 Plan flnaJ 6 1108 doc
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2: Technical Approach Soil Vapor Intrusion Investigation Work Plan
FCX-Statesville Superfund Site OU3
2.2 Soil Gas Sampling Point Installation and Sampling
Soil gas samples will be collected above the groundwater and at approximately 5 ro 7 feet bdow ground
surface (bgs) at each location. Soil gas sampling points will be completed in the vadose 1.onc at least 3 fret
above the top of groundwater and at a minimum of 5 feet bgs to avoid atmospheric interference. In some
instances, groundwater may be too shallow tu install the deeper soil ,gas point and only the shallow point will
be installed. These adjustments will be made in the field.
Three shallow soil gas samples (SG-99s, SG-I 00s, and SG-10 Is) and three deep soil gas samples (SG-99d,
SG-I00d, and SG-101d) along N. Miller Street between 214 Phoenix Street and the school property (sec
Figure 2-1) will be re-sampled. Forty-two soil gas sampling point couplets (one shallow and one deep) will be
installed at the locations idcmificJ on Figure 2-1. For the locations shown near the building, the sampling
points will be placed as close to the foundation as possible. Prior to any subsurface investigation, the North
Carolina One-Call center will be notified as well as a private utility locator to mark underground utilities at the
proposed drilling locations. The soil gas sampling points arc described as Teflon® tubing attached to a
2l-inch stainkss steel mesh screen implant attached to a conical-shaped implant anchor. The tubing and
implant will be placed in the open hole created by the drill rods. 1\ filter sand pack or glass beaJ pack will be
placed around the screen to approximately 6 inches above the top of the soil gas implant screen with granular
bentonite filling the rt.:st of rht.: borehole space around the tubing. i\ pt.:tcock will be placed at tht.: end of the
tubing within the manhole.
Approximately 24 hours after a soil gas point is installed, the air inside tht.: tubing will be purged to bring a
soil gas sample to the surface for analysis. Optimum flow rate and purge \'Olumes arc achieved when \·acuum
pressure is at atmospheric and the contaminant concentration is stable. Enough soil gas will be removed lO
ensure that the sample represented the soil gas within the formation at the depth of the screen. J\ minimum
of three volumes of probe and tubing will be removed prior to collecting a sample. The volume of the probe
and tubing will be calculated using the following et1uation:
Where:
l'V = 0.0492 x rrD'L
PV = purge \'olume in liters
D = tubing interior diameter in inches
L = tubing length in feet
Once the soil gas point is installed, samples will be drawn over a 30-minutc sampling interval !approximately
200 milliliters per minute (mL/min)[ into 1-or 6-liter Summa canisters per rhe Summa procedures. The
petcock in the manhole will be closed after sampling and a Ziploc® baggie will be placed over the petcock to
prevent buildup of debris and insects.
Leak testing: will be rerformed on thL shallow and deLp direct push soil gas samples. Checking for ILaks
during the sampling process determines if ambient air is being introduced inro the sample, causing dilution of
the soil gas samplL and underestimating rhe results.
2.3 Passive Soil Gas Sampling
Passive soil gas sampling will be performed tu investigate the sewers in the vicinity of the school building.
The sampling will assess if utility conduits (i.e., sewer lines) have contributed to the possible presence of
VOCs on the Property. A similar screening sun.'ey is being conducted on the former textile plant property
BROWN AND CALDWELL
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P.\Cliento\El Paso\EPNG FCX\135511-Sd',ooj Properly Plamng«ll-002 ~ Plan\Sd"ool VIA•,SVI Plar1final611 08 OOC
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2: Technical Approach Soil Vapor Intrusion Investigation Work Plan
FCX-Statesville Superfund Site OU3
(Site). 1\s described in Table 2-1 and shown on Figure 2-1, the passive soil gas sampling will be conducted
rn:ar thL sewer in N. Miller Street to the west of the Property and in Yadkin Street to the north of the
Property. The two other sewer transects arc proposed on the Property along the sewer line on the north side
and in the center of the Property. The scn:ening survey will use Gore™ modules that absorb VOCs, if
present, where they an~ placed. The survey includes installing three Gore™ modules for each rransl".ct: one
inside a manhole, one in the soil above the sewer pipe, and one in the soil approximately 10 to 15 fr<.:t away
from thL sewer pipe, preferably toward the school, where practical. The two locations per transcct placed in
the soil will be installed using hand tools to a depth of approximately 1.5 feet bgs. The GoreTM moduks will
be left in place for approximately 3 days and then retrieved and sent to the Gon:TM laboratory for analysis.
2.4 Sub-slab and Indoor Air Sampling
r\s described in Table 2-1, a building survey will be conducted prior to the indoor air and sub-slab sampling
to determine if there arc other sources of VOCs in the building. Common sources include some household
cleaning materials, paints, solvents, adhesives, and fuels. A survey form recommended in the ITRC 2007
guidance document (cited in full in footnote 1) will be used for the survey; a copy of the form is included in
Appendix B. A list of the chemicals found in the building will be documented and cleared 24 hours prior to
sampling inside of the building. Also, information will bL obtained about thL !-kating/Ventilation/ t\ir
Conditioning (HV1\C) system for thL building so thar th<.:rL is gen<.:ra! understanding about air handling inside
th(.'. building.
Indoor air sampling will be performLd at th<.: same locations as sub-slab soil gas sampling. Indoor air sampks
coupled with sub-slab samples will assist in Lvaluating whether there arc Site VOCs present in the sub-slab
and not in the indoor air or vice versa. Indoor air samples \Viii be collected at approximately breathing zone
height. Three ambicnt out.sick air samples will also bc colkcted on school property as described in Table 2-1.
The locations of the ambient air samples will be determined in the fidd. Indoor air and ambi<.:nt air samples
will bc collected over a 24 hour period. Sub-slab samples will be collectLd over a 2 hour period. A wcathcr
station will b<..'. placLd on the school property during the ambient air sampling tu collect parameters such as
temperature, barnmLtric pressure, and wind direction.
Sub-slab samples will be collected following the USEPA Standard Operating Procedure (SOP) for Installation
of Sub-Slab Vapor Probes and Sampling Using EP1\ Method TO-15 to Support Vapor Intrusion
lnvLstigations. The samples will be collected in 1 Liwr or (i Liter Summa canisters sct up for a 2 hour
sampling period. The indoor air samples will be collected in 6 L Summa canisters ovcr a 24 hour period.
2.5 Laboratory Analyses and Quality Assurance/Quality
Control (QA/QC)
Groundwater and soil gas samples will be colkcted and analyzed following the methods and procedures in
this \vork plan an<l the Site Q1\PP. Groundwater samples will be shipped on icc to Lancaster Laboratory in
Lancaster, Pennsylvania, under standard chain-of-custody protocol for 7-day turn-around-time. Groundwater
samples will be analy,ed for VOCs using SW-846 method 826013.
Soil gas, sub-slab air, indoor air, and ambient air samples will be collected in laboratory-cleaned Summa
canisters and will be shippcd, not on ic<.:, un<lcr standard chain-of-custody protocol for a 3-to 7-day turn-
around-rim<..'. to Lancaster Laboratory in Lancaster, Pennsylvania. Soil gas samples will be analyzed using
mLthod TO-15. Thc sub-slab, indoor air, and ambi<..'.nt air samples will bc analyzed b~· TO-15 SIM method
and will bl'. validawd by Environmcnral Data Services.
BROWS AND CALDWELL
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2: Technical Approach Soil Vapor Intrusion Investigation Wor1< Plan
FCX-Statesville Superfund Site OU3
Sampling and analysis QA/QC will be maintained and monitored by the cullcction and analyses of field and
laboratory Q1\/QC samples during the sampling event. Field samples will include equipment blanks, trip
blanks, and duplicates. Laboratory samples will include method blanks and matrix spikes/matrix spike
duplicates as appropriate for the methods used.
BROWN AMDCALDWELL
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SOIL VAPOR INTRUSION INVESTIGATION WORK PLAN
FCX-STATESVILLE SUPERFUND SITE OU3
3. DATA EVALUATION AND REPORTING
The results of inn;stigation will be evaluated and presented in tables and figun::s as appropriate. The
following section presents an overviLw of the criteria for evaluation of the soil gas and indoor air sample
results in comparison to USE.Pt\ scr<.:cning levels that arc protective of indoor air. The groundwat<.:r results
will be compared to tht: Site Performance Standards as indicated in Table 2 of the Scptemb(.;r 2006
Explanation of Significant Difference (ESD) for the Site.
3.1 Screening Levels for Soil Gas and Indoor Air
1\ny detectable concc.:ntrations of OU3 constituents of concern (COCs) in soil bras will be evaluated in
comparison to screening levels published by USEPA. Det<.:ctablc concLntrations in the indoor air will he
compared to the USEPr\ risk-based screening levels to evaluate the indoor air data. Detected COes will also
be compared to rhc background kvels commonly found in indoor air (J\STM 2008) (sec Appendix C). The
Site-rclatcxl COC:s arc commonly found in indoor air and results from this sampling effort will be compan.:d
tu published background values as well as to rhe ambient air darn collectcd during this investigation.
It is important to note that screening levels arc used to determine if additional information is rclJUircd and do
nut represent final cleanup or action levels. Thc screening levels arc concentrations that arc considered
protective of human health. The screening levels for soil gas will be based on protection of indoor air for the
2008 USEPJ\ indoor air screening levels. These indoor air levels are protective for cancer and noncancer
health effects. Cancer risks arc protective for individuals exposed for 30 years (six years as a child and 24
years as an adult), 24 hours a day for 350 days a year. Cancer risk is the potential for exposure to a chemical
to cause an incrcasi.; in an individual's risk of cancer and is expressed as a probability, <:.g., I x 1 o.r, or an
increased risk of 0.000001. Statistics from the American Cancer Society indicate that the individual risk in the
United States is 0.2 or 2 x 10-1• Therefore, in theory, if an individual was exposed to a 1 x 10·6 cancer risk, his
or her indi\'idual risk would increase from 0.2 to 0.20000 I. USEP/\ considers this increase in risk de 111i11i111is
or acceptable according to the Risk 1\ssessmcnt Guidance for Supcrfund: Volume I (Part Band e) (199().
Cancer risk probabilities do not predict actual health effects but arc one of th<..: factors considered by
regulatory agencies when making decisions on whether or not action is needed tu reduce risk. USEPA's
acccptablc cancc..:r risk management range as cited in thi.; National Contingency Plan (NeP) is l(l6 to 10 .. 1• In
accordanc<: with USEPA guidance, risks within the risk management range do not typically warrant action to
reduce exposure (USEP1\ 1991).
The screening levels for voes only kno\vn to ha\-e noncancer health effects arc based on an exposure lcVl.:l
that is unlikely to have an adverse health effect on children as the more scnsitive receptor compared to adults.
The screening levels of voes with only noncancer health effects do not have a range and arc represented by
a single value. It is important to note that screening lcvds arc used to dcterminc if additional information is
required and do not rcpresc..:nt final cleanup or action levels.
BROWN AND CALDWELL
3-1
PIO,ents\El Pa9<l\EPNG FCX\ll55nSchool Property Plamng\001.002 A=,...,,...,! Plan\&hool VIAIS\/1Planfnal611 oe doc
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SOIL VAPOR INTRUSION INVESTIGATION WORK PLAN
FCX-STATESVILLE SUPERFUND SITE OU3
4. LIMITATIONS
This document was prepan.xl solely for EPNG in accordance with professional standards at the time the
scn·iccs Wl'.fC performed and in accordann; with the contract between EPNG and BC dated
Septernlx;r 1, 2006. This document is govcrm.·d by the specific scope of work authorizLd by EPNG; it is nut
intcrnlcd to be relied upon by any other party except for regulatory authorities contemplated by the scope of
work. \\?c have relied on information or instructions provided by EPNG and other partiLs and, unless
otherwise expressly indicatnl, have made no independent investigation as to tht.: validity, cornpktcncss, or
accuracy of such information.
BROWN AND CALOWELL
4-1
P .ICl..intslEI Paso\EPNG FCX\ 135511-Scl>ool Property Ptann,ngil0\-002 AsseSSrl'\llnl Plan\School VIA\SVI Piao final 6 17 08 doc
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BROWN AND CALDWELL
P'\Cents\EI PasmEPNG FCX\13551l•School Property Plamng\OOI-OJ2 As!le1Smenl PlamSchOO VIA\SVl Plan (,rial 6 11 08 doc
TABLES
-- -- ----- -- - - - -
Investigation
Component
Exterior soil gas
sampling
Pre-sampling
building survey
Building air flow
assessment
Interior sub-slab
soil gas sampling
Indoor air
sampling
Passive soil gas
sampling
Groundwater
sampling
Exterior ambient
air sampling
Data Collection Approach for Soil Vapor Intrusion (SVI) Investigation for
N.B. Mills Elementary School, Statesville, North Carolina
FCX-Statesville Superfund Site OU3
Data Objectives Approach
Assess possible presence, location, and concentration of Install semi-permanent vapor sampling couplets in yard area
COCs in vadose zone; compare results to screening levels. and along perimeter of building with sample points at 5-feet
bgs and approximately 5-feet above water table; collect
samples over 30 to 50-minute period.
Assess contribution of chemicals present within building to Inventory chemicals within ground level of building (i.e.,
indoor air COC results. school supplies, cleaning supplies, etc.) and obtain
underground utility maps.
Assess impact of HVAC system on vapor intrusion; use Identify HVAC zones; assess if HVAC system places
results to assist with location selection for sub-slab and differential pressure between interior and exterior of building.
indoor air samples.
Assess possible presence, location, and concentration of Install sub-slab sampling ports co-located with indoor air
COCs in vadose zone below slab; compare results to indoor sampling points; collect over 24-hour period to coincide with
air sampling results and to screening levels. indoor air sampling.
Assess if direct pathway for soil vapor intrusion of COCs to Collect over 24-hour period at representative locations and
indoor air is complete and have data to compare to sub-slab co-locate with sub-slab sample locations.
sample results.
Assess if utility conduits, specifically sewer lines, have Install Gore TM Modules in shallow soil borings via hand tools
contributed to possible presence of COCs in the vicinity of at transects across utilities, especially sewer lines.
property.
Assess if groundwater is contributing COCs to soil gas and Install piezometers adjacent to building, sample groundwater
determine direction of shallow groundwater flow. for COCs, and measure water levels.
Obtain ambient background samples to check for possible Collect over 24-hour period to coincide with indoor air
presence of COCs. sampling at locations upwind to the building at 3-to 5-feet
above arade.
6/17/2008
P:\Chents\EI Paso\EPNG FCX\135571-School Property Plannmg\001-002 Assessment Plan\School VIA\Table 2-1
Number of
Locations
42 Couplets
(23 in yard area
& 19 adjacent to
foundation)
NA
NA
10
10
6 transects
(3 sorber
locations per
transect)
6
3
Page 1 of 1
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BROWS AMD CALDWELL
P \Cl,onts\El Paso\EPNG FCX\135511-&hool Property Pi;.nn,ngl(lOt-002 Assessmenl Plan\Schoo VIA\SVI Plan fmal 6 ti 08 doc
FIGURES
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0 2000 4000
SCALE IN FEET
SOURCE: U.S.G.S. TOPOGRAPHIC MAP, STATESVILLE WEST QUADRANGLE, NC
FIGURE 1-1
SITE LOCATION MAP
FCX-STATESVILLE SUPERFUND SITE OU3
STATESVILLE, NORTH CAROLINA
134391.001.003 5/08
BROWN AND
CALDWELL Nashville, Tennessee
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i SG-99S
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/oa/0 1°/0 /□
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o I -
214 PHOENIX STREET
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OSG-96S SG-960
LEGEND
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SG-995'7S'\ SG~99ct-M' • D
0 -
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SG-100S SG-1000
SG-101S
SG-1010
0 SG-102S SG-1020
0 SG-03S SG-030
(i)
□
0
SOIL GAS SHALLOW/DEEP COUPLET (PROPOSED)
SOIL GAS SHALLOW/DEEP COUPLET (EXISTING)
GROUNDWATER PIEZOMETER
INDOOR AIR AND SUBSLAB LOCATION
□
SEWER MANHOLE (MH) GOREc" MODULE SAMPLE LOCATION
0
0
□
□ 0
0
□ □
□ 0
0 o• -
□
0 0
0 0
PEARL STREET 0
1----n i--; ---1
NOTE:
1. BUILDING SCALE IS APPROXIMATE
2. MAP PREPARED FROM THE FOLLOWING SOURCES:
-I REDELL COUNTY GIS MAPS
-N.B. MILLS ELEMENTARY SCHOOL ADDITIONS AND RENOVATIONS -
MOSELEY ARCHITECTS
0
SEWER OVERLAND VAPOR (OSV) GORE'" MODULE SAMPLE LOCATION 100 0 100 200 - -SEWER LINE --SCALE FEET
1--w w a:::
I--
Cf)
>-<( a:::
(9
FIGURE 2-1
PROPOSED SAMPLE LOCATIONS
FOR N.B. MILLS ELEMENTARY SCHOOL
FCX-STATESVILLE SUPERFUND SITE OU3
STATESVILLE, NORTH CAROLINA
135571 06/08
BROWN AND
C ALD WE LL Nashville, Tennessee
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Instructions for Using Gore™ Modules
BROWN AND CALDWELL
A
P1Cl1en~IEI Paso\EPNG FCX\135511-Schoo Prope~y Plann,ng\001-002 A.,ses,ment Plan\School VIAIS\11 Plan final 6 I I OB doc
APPENDIX A
V1J{i
.,:,•·_ .. ;.'_:_;ii
-
GORE™ SURVEYS ENVIRONMENTAL SITE ASSESSMENT
FOCUSING YOUR REMEDIATION EFFORTS.
Soil Gas Sampling -Storage, Installation and Retrieval Guidelines
NOTE: If you have any questions regarding installation and retrieval, please call:
GENERAL
Jay Hodny, Jim Whetzel or Diane Cooper
[phone]
Always obtain utility clearance before digging or probing.
Site activities which may disturb the natural soil gas migration should not be conducted during the time when
the modules are in the subsurface. Such activities include, but are not limited to, installation/operation of soil
vapor extraction systems, drilling (e.g., air-rotary), excavation, air sparging, etc.
The following items are provided by Gore:
• Shipping container, boxes with partitions containing individually numbered GORE™ Modules, including
trip blanks (DO NOT DISCARD SHIPPING CONTAINER OR PARTITIONED BOXES),
• Insertion rod (please return after use).
• Corks with screw eyes.
• String (cord),
• Chain of Custody and Installation/Retrieval Log
• Custody seals
• Instructions.
STORAGE
GOREn., Modules are carefully cleaned, scaled, and stored after manufacwnng. , ney mus, rema,n sealed
in their vials in the shipping boxes until deployment and after retrieval. DO NOT store them near potential
sources of organic vapors such as petroleum fuels and exhaust, solvents, adhesives, paints, etc.
REQUIRED TOOLS/SUPPLIES
Depending on project objectives or restrictions, GORE™ Modules can be installed to any depth. For soil gas
sampling, a narrow diameter hole (approximately 1/2 to 1-inch) is drilled or driven to a depth of at least three
feet. Simple hand tools such as a slam bar or rotary hammer drill will suffice. Direct-push or auger type tools
can also create deeper installation holes.
Additional tools (to be supplied by the customer) required for installation may include:
• Equipment to lay out and mark sample locations (scaled map, measuring tapes. pin flags, GPS);
• Disposable gloves and equipment decontamination supplies
• If sample locations need to be hidden from view to prevent damage by vandalism or animals, a metal
washer or nut on top of the cork and covered with dirt can be used in place of visible marker. Use a
metal detector to locate modules for retrieval.
• Slide hammer/tile probe (slam bar) or electric rotary hammer drill (AC power outlet or portable
generator and extension cords required) with carbide-tipped bits or augers (1/2 to 1-inch diameter,
three feet or more in length).
• Information on where these items can be purchased is provided below as a courtesy and docs not
represent any endorsement of these products or suppliers:
Item Sunnlier Phone No.
• Slide Hammer/Tile Probes Forestrv Sunnlies [phone]
• Carbide Drill Bits (36" long) 1. Kerfoot Technologies. Inc. 1 . ( 508) 539-3002
2. the Blade Runner 2. [phone]
• Rotarv Hammer Drill SKILL-BOSCH Power Tools [phone]
• Art's Manufacturing Supply (dba AMS) has all these items [phone]
1 of 3
TRIP BLANKS
An additional number (specified) of GORE™ Modules are included as trip blanks. The customer
selects which modules to be used/treated as trip blanks, and notes this on the Chain of Custody
and Installation/Retrieval Log. These modules remain unopened, travel to and from the site during
installation and retrieval, and while in storage away from Gore's facility.
MODULE INSTALLATION
• To facilitate the installation of the modules, it is recommended that the cord and corks be
prepared prior to going to the field. As an example, for a three foot installation, cut a piece of
the supplied cord to a length of approximately 7.0 feet or 2.25 meters. Tie the ends of the
cord together using a non-slip knot (square knot is suggested, Figure 1 ). Pass the looped
cord througl1 the eyelet in the cork and pull it back through itself. Wrap the remainder of the
cord around the cork and secure the cord/cork combination with a rubber band. The cork and
cord are now ready to attach to the module after the pilot hole is created at the installation
location.
Square knot instructions (Figure 1)
1. Take an end of the cord in each hand.
2. Pass the left-hand cord over the right-hand cord and wrap it around tho right-hand
cord.
3. Take the cord end that is now in your right hand, place it over the cord end in your
left hand and wrap it around that cord.
4. Pull the cord carefully to tighten the knot.
Figure 1. Square Knot
• We do not recommend installation of modules within 15 feet of monitoring wells, utility
trenches or other conduits, which may act as a preferential pathway for soil vapor
migration.
• Drive/drill the narrow installation hole at the desired pre-marked location. In sandy soils,
occasionally the hole will collapse after the drill or tile probe is removed. Adding deionized
water to the sandy soil will temporarily compact the soil and keep the hole open for module
insertion.
• Wearing clean surgical gloves, remove module from the numbered jar and re-seal the jar. The
barcode on the jar lid should correspond with the serial number on the module -please verify.
• Attach the cord and cork to the module by passing the looped cord through the loop on the
module and pull the cord/cork back through itself.
• Place the insertion rod into the pre-cut pocket at the base of the module and lower it into the
hole. If you encounter resistance remove the module and ream the hole and re-insert the
module.
• Once deployed to the desired depth, press the insertion rod against the side of the hole and
twist slightly to release the module. Remove the rod and push any excess cord into the hole
and plug it with the cork (Figure 2).
• Indicate the module number, date and time of installation and any pertinent comments on the
installation/retrieval log. Write the module serial number on the site map adjacent to the
appropriate map location.
• To minimize sample location errors, it is preferable to record the GORE™ Module serial
number on the field map. However, if another sample numbering system is used,
information relating the sample number system to the GORE™ Module serial numbers
must be provided either on tho Installation and Retrieval Log, or in a separate table.
2 of 3
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• Clean the tile probe or drill bit and the insertion rod prior to use at the next location. Replace the surgical
gloves as necessary before handling any modules.
• Following module installation, the modules selected as trip blanks should be kept in the sample box
provided and stored as described above in "STORAGE" until sample retrieval.
MODULE RETRIEVAL
• Following the module exposure period identify and check each location in the field using the site map.
• Remove the cork with a penknife or corkscrew. Grasp the cord and pull the module from the ground;
verify the module ID number. Cut off and discard the cork and cord. Place the entire module in its
labeled jar and secure the lid.
Use caution whlm screwinq down ttie lid on the sample jars. Clean any soil/debris from the
thrends of the jar and lid, ,1nd rnake sure no part of the modulo is pinched betwe(~n tl1c jar and !id.
Be sure tho seal Is tight. Over~tightenin~J may cause break~fje.
AfHx n custody S{~al to the side of the jar and jar lid. Do not cover the IJarcodc with the son!.
• Place the jar in the supplied partitioned box.
• Complete the module retrieval date/time on the Installation/Retrieval log.
PACKAGING FOR RETURN
• Place boxes with modules back into outer shipping container using appropriate packing materials to
protect fragile contents.
• Do not use Styrofoam "peanuts" as packing material. Bubble packing is acceptable.
• Label box to indicate fragile contents.
• There is no need to return the shipment in coolers with ice.
• Return tliu GOtH:TM Modulos insorlion rod and paoerwork (preferably by overniuht courier) tu:
Screening Modules Laboratory
W.L. Gore & Associates, Inc.
100 Chesapeake Blvd.
Elkton, MD 21921
Phone: [phone]
Attn: NOTIFY LAB IMMEDtAT.ELY UPON DELIVERY!!
IMPORTANT: Samples should not be shipped for weekend or holiday delivery at GORE.
Figure 2. GORE™ Module Installation
fr~
SOIL SURFACE f Nfk ......... :.Y"'c,.;f\cJ,1{if~~1
Initial insertion
Slide hammer ·,.-~TC;lt.aar.>,.· .. . ; 1~1-...._,,-~,;~JT0,:'l.,
:· .. -
1 _,60~
Crea/ive ltJchno/og1t:iS
V-IDrkilrnic
www.gore.com/ surveys W, L. Gore & Assodatcs, Jnc.
100 Chcs:ipt~kc Blvd.
P.O. Ho1. 10
E!k11m, ~!l) 21922-0010
Tel. 1--IJ0-3'J2-760ll
After insertion,
before cork seal
Sale Offices:
l~umpc: +,llJ-IW-•!(11 ?.-2198
I lou~tun: 1-281-405-55/40
$:m Frnnci~co; !--HS-648-(J.1)8
' F:ix. J .,110-5(16-,1870 E1n;1il: cm•irornncn1~l@wl1;orc.t1ltn
The optimal p~1formur1ce of any Core prnduC1 it <Jepen(len1 upon how ii isincoroorot~u in the linol dcwice.
Please co11locl onu oi OVf lcchnicol soles msodo!e~ tor opp!icorion os!.lstonce.
GORE a .. d dei.ign~ me troOcmorl's 01 w. L Gore 1 Asmr.iotcs © 2007 W. L Gore IL Mwclotes. Inc.
3 or 3
!IT 11/.9062807
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Example of an Indoor Air Survey
BROWN AN'DCALDWELL
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P·ICl,anls',0 Paso\EPNG FCX1135511·Sct>ool Property Planrnr,g\001-OO2 A.sSllssmenl Plan\School VIAISVI Plan final 6 11 08 doc
APPENDIX B
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OSR-3
NEW YORK STATE DEPARTMENT OF HEALTH
INDOOR AIR QUALITY QUESTIONNAIRE AND BUILDING INVENTORY
CENTER FOR ENVIRONMENTAL HEAL TH
This form must be completed for each residence involved in indoor air testing.
Preparer's Name ________________ Datefrime Prepared _____ _
Preparer's Affiliation ______________ Phone No. _________ _
Purpose of Investigation. ___________________________ _
1. OCCUPANT:
Interviewed: YIN
Last Name: ___________ First Name: __________ _
Address: ----------------------------
County: _______ _
Home Phone: _________ Office Phone: ________ _
Number of Occupants/persons al this location __ _ Age of Occupants _________ _
2. OWNER OR LA.i"IDLORD: (Check if same as occupant_)
Interviewed: YIN
Last Name: First Name: ----------------------
Address: ___________________________ _
County: _______ _
Home Phone: Office Phone: ------------------
3. BUILDING CHARACTERISTICS
Type of Building: (Circle appropriate response)
Residential
Industrial
School
Church
Commercial/Multi-use
Other: --------
----------------------
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If the property is residential, type? (Circle appropriate response)
Ranch
Raised Ranch
Cape Cod
Duplex
Modular
2-Family
Split Level
Contemporary
Apartment I-louse
Log Home
If multiple units, how many? ___ _
If the property is commercial, type?
3-Family
Colonial
Mobile Home
Townhouses/Condos
Other: _____ _
Business Typc(s) _______________ _
Does it include residences (i.e., multi-use)? YIN
Other characteristics:
If yes, how many? __ _
Number of floors Building age __ _
ls the building insulated? Y / N How air tight? Tight/ A vcragc / Not Tight
4. AIRFLOW
Use air current tubes or tracer smoke to evaluate airflow patterns and qualitatively describe:
Airflow between floors
Airflow near source
Outdoor air infiltration
Infiltration into air ducts
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5. BASEMENT AND CONSTRUCTION CHARACTERISTICS (Circle all that apply)
a. Above grade construction: wood frame concrete stone brick
b. Basement type: full crawlspace slab other ----
c. Basement floor: concrete dirt stone other ----
d. Basement floor: uncovered covered covered with -------
e. Concrete floor: unscaled sealed sealed with ______ _
f. Foundation wans: poured block stone other ----
g. Foundation wans: unsealed sealed sealed with ______ _
h. The basement is: wet dry moldy
i. The basement is: finished
damp
unfinished partially finished
j. Sump present? YIN
k. Water in sump? YIN I not applicable
Basement/Lowest level depth below grade: ____ (feet)
Identify potential soil vapor entry points and approximate size (e.g., cracks, utility ports, drains)
6. HEATING, VENTING and AIR CONDITIONING (Circle all that apply)
Type of heating system(s) used in this building: (circle an that apply-note primary)
Hot water baseboard
Radiant floor
Hot air circulation
Space Heaters
Electric baseboard
Heat pump
Stream radiation
Wood stove Outdoor wood boiler Other ____ _
The primary type of fuel used is:
Natural Gas
Electric
Wood
Fuel Oil
Propane
Coal
Kerosene
Solar
Domestic hot water tank fueled by: ____________ _
Boiler/furnace located in: Basement Outdoors Main Floor
Air conditioning: Central Air Window units Open Windows
Other ____ _
None
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Are there air distribution ducts present'!
4
YIN
Describe the supply and cold air return ductwork, and its condition where visible, including whether
there is a cold air return and the tightness of duct joints. Indicate the locations on the floor plan
diagram.
7. OCCUPANCY
Is basemenlilowest level occupied? Full-time Occasionally Seldom Almost Never
General Use of Each Fluor (e.g., familvroom, bedroom, laundrv, workshop, storage)
Basement
1st Floor
2"' Floor
3'' Floor
4'' Floor
8. FACTORS THAT MAY INFLUENCE INDOOR AIR QUALITY
a. Is there an attached garage? YIN
b. Does the garage have a separate heating unit? YIN I NA
c. Are petroleum-powered machines or vehicles Y / N / NA
stored in the garage (e.g., lawnmower, atv, car) Please specify _______ _
d. Has the building ever had a fire"/ YIN When? _______ _
e. Is a kerosene or unvcnted gas space heater present? YIN Where? _____ ~_
f. Is there a workshop or hobby/craft area? YIN Where & Type? ______ _
g. Is there smoking iu the building? YIN How frequently'' ______ _
h. Have cleaning products been used recently? Y I N When & Type''
i. Have cosmetic products been used recently? YIN When & Type? ______ _
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j. Has painting/staining been done in the last 6 months?
k. Is there new carpet, drapes or other textiles'!
I. Have air fresheners been used recently?
m. Is there a kitchen exhaust fan?
u. Is there a bathroom exhaust fan?
o. Is there a clothes dryer?
p. Has there been a pesticide application?
Arc there odors in the building'/
YIN Where & When?
YIN Where & When?
YIN When & Type?
YIN If yes, where vented?
YIN If yes, where vented?
YIN If yes, is it vented outside? Y / N
YIN When & Type?
YIN
[fyes, please describe: ___________________________ _
Do any of the building occupants use solvents at work? Y / N
(e.g., chemical manufacturing or laboratory, auto mechanic or aulo body shop, painting, fuel oil delivery,
boiler mechanic, pesticide application, cosmetologist
If yes, what types of solvents are used? _____________________ _
If yes, are their clothes washed at work? YIN
Do any of the building occupants regularly use or work at a dry-cleaning service'/ (Circle appropriate
response)
Yes, use dry-cleaning regularly (weekly)
Yes, use dry-cleaning infrequently (monthly or less)
Yes, work at a dry-cleaning service
No
Unknown
Is there a radon mitigation system for the building/structure? Y / N Date of Installation: ____ _
Is the system active or passive? Active/Passive
9. WATERANDS~:WAGE
Water Supply: Public Waler Drilled Well Driven Well
Sewage Disposal: Public Sewer Septic Tank Leach Field
Dug Well
Dry Well
I 0. RELOCATION INFORMATION (for oil spill residential emergency)
Other: __ _
Other: __ _
a. Provide reasons why relocation is recommended: ________________ _
b. Residents choose to: remain in home relocate to friends/family
c. Responsibility for costs associated with reimbursement explained?
d. Relocation package provided and explained to residents?
relocate to hotel/motel
YIN
YIN
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11. FLOOR PLANS
Draw a plan view sketch of the basement and first floor of the building. Indicate air sampling
locations, possible indoor air pollution sources and PID meter readings. If the building does not have a
basement, please note.
Basement:
··-······· .. ··•• .,., .... .
---... , ..
:.L ........... , .. , , ............. , ..... ···-••I••··--·"·····"·· • ········-··"•""'"
l--+-1--+•-· ---· i r
First Floor:
•.••.•. , ........ , .. , .. , .. ,. ,·--··· ·-····"' ... , .. , ........ , ......... ,..,, .. ,
; •...
! .... ,., .................. . .. -........... ------,-•"'"·""'""'"' .. , .. , .. ,.,.
-----······1-····-"·
I ----f--➔----·---1-··+ ·-1-··· ·i
j i··+·+· -
--i-j ----_ _1 --+ l~-l----------·---
f ------I ---l---------··-· -·-· ----
: J ---·--·· ·1·--·!--·1···'··+ I ~-_L-J___J.___J --------·-•-L ___ ---
.. !-,--·1····L-...... --1-·-t--·--!---1---••I-•-··· ---·-·--------·-······ !
' : ' _ _I ---·---------I ! I ' I : i i -1--'---'···+ i .
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12. OUTDOOR PLOT
Draw a sketch of the area surrounding the building being sampled. If applicable, provide information
on spill locations, potential air contamination sources (industries, gas stations, repair shops, landfills,
etc.), outdoor air sampling location(s) and PID meter readings.
Also indicate compass direction, wind direction and speed during sampling, the locations of the well
and septic system, if applicable, and a qualifying statement to help locate the site on a topographic map.
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•.• • 1 .... ,., •.•• , ... ""'"·"""·'·'' .... L ........ .
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8
13. PRODUCT INVENTORY FORM
Make & Model of field instrument used: _________________ _
List specific products found in the residence that have the potential to affect indoor air quality.
Field
Size Condition . Chemical Ingredients Instrument Location Product Description (units) Reading
(units)
• Describe the condition of the product containers as Unopened (UO), Used (U), or Deteriorated (D)
** Photographs of the front and hack of product containers can replace the handwritten list of chemical
ingredients. However, the photographs must be of good quality and ingredient labels must be legible.
UTSA\Se,tions\SJS\Oil Spills\Guidancc Docs\Aiproto4.doc
Photo ..
YIN
APPENDIX C
ASTM E2600 -08 Table X7. Typical Background voe Concentrations
-------------BROWS AND CALDWELL
C
Pmients\EI PasolfPNG FCX\\35511-Sc/,ooj Prope,ty Plamng'llOl-002 Assessment PlanlScrool VV,IS\11Planfral611 08 doc
D '° E 2600-08
D X7. TYPICAL BACKGROUND voe CONCENTRATIONS
D Norn X7.l-Data shown in units of µg/m3 assume a tl!mperature of
25°C and a pressure of l atmosphere. To convert ppbv to µg/m3 multiply
ppbv by (l 2.19)(MW)/(273. !5 + 0C).
R
D Compound
Benzene
m Toluene
Ethylbenzene
m-/p-Xy!ene
o-Xylane
1,3,5-Trimelhylbenzene
m 1,2,4-Trimelhylbenzene
1,2,3-Trimelhylbenzene
MTBE
n-Hexane
I n-Hep!ane
n-Octane
n-Nonane
n-Decane
n-Undecane
I n-Dodecane
Naphthalene
Tetrachloroethy1ene (PCE)
Trich1oroelhylene (TCE)
Chloroform
m
1, 1, 1-Trichloroelhane
Vinyl Chloride
Formaldehyde
Compound • Benzene
Toluene
Ethylbenzene
I m-/p-Xytene
a-Xylene
1,3,5-Trime!hylbenzene
1,2,4-Trimethylbenzene
1,2,3-Trimethylbenzene
I MTBE
n-Hexane
n-Heptane
n.:Oclane
I n-Nonane
n-Decane
n-Undecane
n-Oodecane
Naphthalene
I Tetrachloroethylene (PCE)
Trichloroethy1ene (TCE)
Chlorofonn
1, 1, 1-Trichloroethane
Vinyl Chloride I Formaldehyde
" 90th percentile value.
I
l hl ASTM 11'1\etMi,:,nllJ
~ tJy IHS \lf>dM 11,;anse Wllh ASTM
Odl/C1:0n or notworklng pe/'IT!lltod wilhoul lk:'&nse from IHS
TABLE X7.1 Select voes In Existing Residences
N
980
641
160
437
579
151
9
142
9
9
19
151
142
142
142
10
910
1,100
613
598
161
190
N
980
641
160
437
579
151
9
142
9
9
19
151
142
142
142
10
910
1,100
613
598
161
190
(Adapted from: Hodgson. and Levin, 2003)
Mean
1.5
6.7
1.4
2.9
1.1
0.51
2.4
0.42
0.28
0.70
0.78
0.97
1.3
0.55
0.35
0.41
0.23
0.37
2.4
55
Mean
4.8
25
6.1
13
4.8
2.5
12
2.1
0.99
3.3
4.1
5.6
8.3
3.8
1.8
2.8
1.2
1.8
13
68
Concentration (ppbv) in Existing Residences
Median 95th Percentile
0.87 4.0
3.3 7.8-13A
0.53 3.0A
1.4 5.0
0.53 1.6
0.25
0.79
0.20
0.51
0.26
0.24 2.4A
0.25
0.44
0.28
0.17
0.09 0.41,..
0.15 0.72-1.0
0.08 0.13-0.26
0.19 1.2
0.36 1.4-3.2
<0.01 0.04
17 37A
Concentration (\Jg/m3) in Existing Residences
Median
2.8
12
2.3
8.1
2.3
1.2
3.9
0.98
1.8
1.1
1.1
1.3
2.6
1.8
1.2
0.47
1.0
0.43
0.93
2.0
<0.026
21
41
Li<:ensee•Brown & Caldw,!11/5!105905100
NOi for Rn11!e. 03~ 11:10:45 MST
95th Percentile
13
29-49"-
13A
22
6.9
,,,
2.1A
4.9-6.8
0.70-1.4
5.9
7.6-17
0.10
. 46 ....
Max
41
240
40
120
43
14
7.9
3.6
14
20
39
18
0.95
65
5
4.3
180
0.72
330
Max
131
905
174
521
187
69
39
17
74
116
249
125
5.0
441
27
21
983
1.8
406