NCD986175644_20010222_Davis Park Road TCE Site_FRBCERCLA RA_Remedial Action Report-OCR

I
I
I
I
D
I
I
I
I
I
I
I
I
I
I
I
I
I
I
REMEDIAL ACTION REPORT
FOR DAVIS PARK ROAD/TCE SITE
GASTONIA, GASTON COUNTY, NORTH CAROLINA
Febmary 2001
Prepared for
U.S. Environmental Protection Agency
77 West Jackson Boulevard
Chicago, Illinois 60604
This document was prepared in accordance with U.S. EPA Contract No. 68-W7-0026, WESTON
Region V Response Action Contract (RAC) and contains confidential business infonnation.
Document Control No. RFW048-2A-AHMX
NOR/K:\WP\20064\048\RAR001.DOC
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Prepared
and
Approved By:
Approved By:
REMEDIAL ACTION REPORT
Remedial Ac1ion Report
Davis Park Road TCE Site
Date: February 200 I
DCN, RFW041\.2A-AIIMX
FOR DA VIS PARK ROAD/TCE SITE
GASTONIA, GASTON COUNTY, NORTH CAROLINA
u_s_ EPA CONTRACT NO. 68-W7-0026
Work Assigmnent No. 048-RARA-04PN
Document Control No. RFW048-2A-AHMX
For--famesBurton
Program Manager
February 200 I
Date:
Date: ,;;,Ida h (
NOR/Kc\WP\20064\048\RAR001.DOC
This documl'nt was prepared by Roy F. Weston, Inc., express)~· for U.S. EPA. It shall not be released or disclosed in whole or inqrt without
the express, written permission of U.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
TABLE OF CONTENTS
Section . Title
Remedial Action Report
Davis Paik Road TCE Site
Date: Fcbrnary 200 I
DCN: RFW048-2A-AIIMX
EXECUTIVE SUMMARY .................................................................................................... ES-I
2
3
4
5
6
INTRODUCTION .............................................................................................. 1-1
1.1 Report Organization ................................................................................ 1-1
SITE DESCRIPTION ........................................................................................ 2-1
2.1 Site Location ............................................................................................ 2-1
2.2 Groundwater Contaminant Description ................................................... 2-3
2.3
2.4
2.5
2.2.1 Contaminant Source Arca .................................................................. 2-3
2.2.2 Groundwater Plume Concentration and Extent ................................. 2-5
Contaminant Health Concerns ................................................................. 2-5
Description of the ROD ......................................................................... 2-12
Status of Remedial Action ..................................................................... 2-14
REMEDIAL ALTERNATIVES REVIEW ..................................................... 3-I
3.1 Connection to Municipal Supply ............................................................. 3-1
3.1.1 Pressure Distribution Model. ............................................................. 3-4
3.2 Providing Water Treatment Units for Individual Wells or Homes ......... 3-4
3.3 Land Requirements .................................................................................. 3-5
3.4 Quarterly Monitoring ............................................................................... 3-6
DESIGN IMPLEMENTATION ....................................................................... 4-1
4.1.1 Preliminary Dcsign ............................................................................ 4-I
4.1.2 Survey of Property Lines ................................................................... 4-1
4.1.3 Revised RA Cost Estimate ................................................................ 4-1
4.1.4 Pre-final Design and Final Design ..................................................... 4-2
4.1.5 Construction/Installation of Water Lines and Carbon Filtration
Systems .............................................................................................. 4-2
4.1.6 Water Lines and Carbon Filtration Systems Operation and
Maintenance ...................................................................................... 4-3
BASIS OF DESIGN ........................................................................................... 5-1
REMEDIAL ACTION COST SUMMARY .................................................... 6-1
NORIK:\WP\20064\048\RAR001 .DOC
This documcnl was prcpan·d by Ro:r F. Wt•stou, hll',, t'XJ)rcssly for U.S. EPA. It shall not he rt.'ll'asC'd or disrlos{'d in whole or in part wi1ho111
the nprcss, writlen permissim or U.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Figure
2-1
2-2
2-3
2-4
2-5
2-6
3-1
2-1
2-2
2-3
4-1
6-1
APPENDIX A
APPENDIX B
APPENDIX C
LIST OF FIGURES
Title
Remedial Action Rcpor1
Davi:-Park Road TCE Site
Date: February 200 I
DCN, RFW048-2A-AHMX
Site Map ............................................................................................................... 2-2
PCE Concentration Isopleth Map, 1997/1998 f-ield Investigations ................... 2-10
TCE Concentration Isopleth Map, 1997 /l 998 Field Investigations ................... 2-1 I
Residences Connected to City Water, September 2000 ..................................... 2-15
Residences Supplied with Carbon Filtration Units, August 2000 ..................... 2-16
Abandoned and Converted Wells, August 2000 ................................................ 2-17
Main and Distribution Line Extensions ............................................................... 3-2
LIST OF TABLES
Title Page
Residential Well Analytical Data Summary-May 1996 Preliminary
lnvestigation ..................... ·-··························-······················································· 2-6
Groundwater Samples -Bedrock Aquifer, Analytical Summary ........................ 2-7
Remediation Goals for Groundwater at the Davis Park Road Site .... : ............... 2-13
Carbon Filtration Unit Influent and Effluent Analytical Results ......................... 4-4
Summary of Project Costs ......................... ·-························································· 6-1
LIST OF APPENDICES
City Of Gastonia Annual Water Quality Report For 1999
Pressure Distribution Model Results
Carbon Filtration Assembly
NOR/K:\WP\200641048\RAR00 1.DOC II
This documC'nl was prepared by Ro)''•-. Weston, Inc., expressl)' for U.S. EPA. It shall 1101 be n-lrased or disclosC'tl in wholt' or in part wilhout
the l'xprcss, written permissim of U.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
EXECUTIVE SUMMARY
Remedial Action Report
Davis Park Road TCE Site
Date: February 200 I
DCN: RFW048-2A-AHMX
The Davis Park Road TCE site is an approximate 20-acre area of private businesses and residential
homes in the southwestern portion of Gastonia, Gaston County, North Carolina. The residential area
at the site includes the Cedar Oak Park subdivision located on the cast side of Davis Park Road
within the confines of Cedar Oak Circle as well as areas along the western side of Davis Park Road.
For the completed Remedial Design (RD) and this Remedial Action Report (RAR), the site consists
of an area of reportedly contaminated soil behind a building that is located at 2307 Davis Park Road
and a plume of contaminated groundwater that emanates from this property and extends south along
Davis Park Road to Blackwood Creek. The plume of contaminated groundwater underlies residences
at the site along the plume's entire horizontal extent, as defined within the 1998 Remedial
Investigation report. Prior to the Remedial Action (RA), a majority of the homes within the site
received water from private or community system water supply wells.
After completing the Remedial Investigation and Feasibility Study (RI/FS) in 1998, EPA developed
the Record of Decision (ROD) for the Davis Park Road site that outlines the most effective remedial
method for the groundwater contamination underlying the area. The RD for the Davis Park Road
site, which is based on the ROD, was completed in February 2000 and included design ofa system to
supply city water services to approximately 7 5 residents and a provision of individual residential I carbon filtration units for up to 75 residents. In addition, the ROD and the RD make provision for "a
Natural Attenuation study followed by monitored Natural Attenuation of the bedrock aquifer I groundwater plume. Groundwater monitoring will be conducted on a quarterly basis for three years
and annually for the next 27 years" (EPA, 1998). Prior to initiation of RA field activities,
I
I
I
I
I
representatives of the local Gaston County Health Department requested that EPA abandon
residential wells in accordance with state requirements. EPA subsequently requested that WESTON
make provision for abandonment of residential wells at the site. Although not part of the RD, the
abandonment was completed as part of RA field activities.
In March and April 2000, permits for the waterline installation phase of the project were obtained
from state and local agencies and completed. During the same month, bids were obtained from local
NOR/K:\WP\20064\048\RAR001.00C ES-I
This document was prepared by Roy F. Weston, Inc., expri'ssly forl.J.S. EPA. II shall 1101 he rell'ased or disclosed in whole or in parl without
the express, w.-ittcn permission of U.S. EPA. '
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Remedial Action Report
Davis Park Road TCE Site
Date: Febniary 200 I
DCN: RFW048-2A-AIIMX
contractors to install the waterline. A bidder was selected in April 2000. Waterline installation
activities began on 5 May 2000 and were completed by 15 September 2000. A total of 5,695 feet of
waterline was installed along the streets throughout the site to provide connections for a total of 64
homes. Five residences selected carbon filtration units for the water supply service. Bids for the
carbon filter unit installation were issued in March 2000, and a bidder was selected in April 2000.
The live carbon units were installed in July 2000. The residential well abandonment process began in
August 2000, following the connection of a majority of the homes to City water. A total of 17
residential wells were abandoned at the site. One residential well was converted to a monitor well.
Currently, under agreement with site prope11y and homeowners, WESTON and its subcontractors
will maintain and replace defective equipment along the waterline between the point at which the
connection was made to the existing home plumbing and the service end of the water meter for a
period of one year. After this time period has expired, the homeowner will be. responsible for
maintenance of this same line. The subcontractor is also responsible for the maintenance of the main
waterline and all appurtenances for a period ofone year, after which the City of Gastonia will assume
responsibility. The one-year period is set to expire on 15 September 200 I. WESTON is also
performing quarterly sampling of the influent and effluent at each carbon filtration unit for a one-year
period. Two carbon tilter exchanges at each unit will also be conducted during the one-year period.
An initial round of sampling occurred on 24 August 2000. Sampling results indicated ineffective
filtration of volatile organic compounds (VOCs). The granular carbon filters were replaced with
block carbon filters and the groundwater influent and effluent were resampled on 22 September
2000. Groundwater samples indicated effective filtering by the carbon block filters. The first round
of quarterly sampling following effective carbon filter installation was performed on 17 October
2000, and the second round was perfonned on 24 January 2001. llw block filters were replaced with
new filters on 21 February 2001.
NOR/K :\WP\20064\048\RAROO 1.00C ES-2
This tlornmcnl m1.~ prcpan-d b)' Roy F. \\'cston, Inc., exprl'sSI)' forU.S. EPA. It shall not be rcll-ascd or disdosl'd in whole or in part without
lhe c.,prcss, wrillcn pcr·mission of U.S. EPA.
'·. ~·~· .
ti~<rt~\r ... , .. . .. '
; .. ,,, :> .·.·., ., ·,:,.-; ":, ,z,_,: •!':il C-• ••. • ,: :..,, . .:v .. , .. .._,, :,, 11111 • ~, __ :: . ,
..... ··1: < ·::· l,.·: •-,~•.; ·:-:
: : -:-.,·. ;_:_:,. --~ ...... ' '
~~t-.-~.•
. '
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SECTION I
INTRODUCTION
Remedial Action Report
Davis Park Road TCE Site
Date: February 200 I
DCN: RFW048-2A-AHtv1X
Roy F. Weston, Inc. (WESTON,,,) has prepared this Remedial Action Report for the U.S.
Environmental Protection Agency (U.S. EPA), Regions IV and V, documenting the Remedial Action
(RA) at the Davis Park Road Trichloroethcnc (TCE) site. WESTON has prepared this report under
Work Assignment No. 048-RARA-04PN of Contract No. 68-W?-0026 with U.S. EPA and in
accordance with the RA Work Plan prepared by WESTON dated 20 April 2000. WESTON has
conducted the RA in accordance with the 22 March 2000 Statement of Work (SOW) and consistent
with the Record of Decision (ROD) issued on 9 September 1998, the RD/Remedial Action (RA)
Handbook (OSWER, 9355.0-04B, EPA 540R-95/059, .lune 1995), the Fchrnary 2000 Final Remedial
Design, and all other guidance used by EPA in conducting an RD.
The Davis Park Road TCE site is a Fund Lead site. WESTON, under the Region V Remedial Action
Contract (RAC) and implemented as a contract crossover to Region IV, was assigned the
responsibility of conducting an RA to execute the provisions of the ROD. This report presents
infonnation developed during the RA. Approved finalized design drawings for the RA activities
(Davis Park Road site As-Builts) arc provided under separate cover.
I.I REPORT ORGANIZATION
This Remedial Action report contains the following sections:
•
•
•
•
•
•
Section I -Introduction
Section 2 -Site Description
Section 3 -Remedial Alternatives l{cview
Section 4 -Design Implementation
Section 5 -Basis of Design
Section 6 -Remedial Action Cost Summary
NORJK:\wPl.200641048\RAROO l .DOC 1-1
This dornmcnt was prl'pared h~· Roy F. Weston, Inc, expressly for U.S. EPA. It shall not be rclC'asl'd or disclosed in whole or in part wilhout
lhc express, written permission of lJ.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SECTION 2
SITE DESCRIPTION
Remedial Action Report
Davis Park Road TCE Site
Date: February 200 I
DCN: RFW048-2A-AIIMX
This section provides a brief review of the location and history of the site, contaminant extent, health
and regulatory concerns, and status of the RA.
2.1 SITE LOCATION
The Davis Park Road TCE site is located within the Gastonia Extra Territorial Jurisdiction area
along Davis Park Road, south of Hudson Boulevard and north of Blackwood Creek in the
southwestern portion of Gastonia, Gaston County, North Carolina. The site consists of an area of
reportedly contaminated soil behind a building that is located at 2307 Davis Park Road, and a plume
of contaminated groundwater that emanates from this property and extends south along Davis Park
Road to Blackwood Creek. The site also includes the Cedar Oak Park Subdivision located on the east
side of Davis Park Road within the confines of Cedar Oak Circle as well as areas along the western
side of Davis Park Road. The Davis Park Road TCE site is located at latitude 35° 13' 56" N and
longitude 81 ° 13' 08" Won the Gastonia South, North Carolina United States Geological Survey
(USGS) Quadrangle Map. Figure 2-1 presents a site map for the Davis Park Road TCE site.
The plume of contaminated groundwater underlies residential areas along the plume's entire
horizontal extent. The contaminant levels and areal extent arc further described in Section 2.2. At the
time of the discovery of contaminants in the groundwater (March 1990), a majority of the residences
throughout the site were supplied water by residential water supply wells and, as a result of the
continued migration of the plume, became contaminated with the chlorinated hydrocarbons found in
the plume. Since that time, several neighborhoods within the site have been connected to the
Gastonia public water supply to reduce the potential health threat from the contaminants. In 1996,
many of the houses within the Hedgcwood Circle neighborhood, which borders the northern edge of
the site, were connected to the public water supply. In late I 997 and early 1998, after petitioning the
city for water services, all of the homes in the Cedar Oak Circle subdivision, which dominates the
NOR/K:IWP\20064\048\RAR001 .DOC 2-1
This dornm('nt was prepared b)' Ro:yF. Wl"ston, lrn:., expressly for U.S. EPA. It sh:111 not he released or disclosed in whole or in part without
the l'Xpn-ss, writtl"n permission of U.S. EPA.
-
~
I z ~ i ~
-----
Ill
- --
FIGURE 2-1
SITE MAP
-
II
II
II
II
o II . ,,
0
iii
•
DAVIS PARK ROAD TCE SITE
GASTONIA, NORTH CAROLINA
//
----
,,
' B
0
,/Jg
A
Q
0
II ... • ~
0.lSTOMA QTY I.MITT
la El
RICHLAND AVENUE
f;amaa::11m=c::im GLENAAVEN AVENUE
II
II
II t,~
c:, @
CJ D l?El
0
--
Approximate
Scale In Feet
600
.. -
1200 L----------------------------------------~~~~~-------'
--------------------------
-
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Remedial Action Reporl
Davis Park Road TCE Site
Date: Fchruary 2001
DCN: RFW048--2A·AHMX
eastern side of the site, were connected to the public water supply. Approximately 130 homes within
the site were receiving water from residential water supply wells prior to RA activities. Over half of
these homes (approximately 75) had water supply wells that were or could potentially be affected by
the contaminant plume as depicted in the 1998 RI report.
2.2 GROUNDWATER CONT AMIN ANT DESCRIPTION
This section describes the potential source area of the contmnination, current knowledge of the
groundwater plume, and the extent of the plume.
2.2. l Contaminant Source Arca
According to preliminary site investigation reports described in the RI report, on 31 March 1990, a
groundwater sample was collected by Gaston County Environmental Health representatives from a
supply well within the Cedar Oak Park subdivision as part of a routine sampling procedure in
accordance with "Community Well Rules." Analysis of the sample revealed concentrations ofTCE
(34.9 micrograms per liter [pg/L]), PCE (23.7 ;tg/L), and chloroform (9.2 pg/L). A confinnation
sample was collected from this well on 17 April 1990, and analytical results were similar to the
original sample. Groundwater samples subsequently collected from three nearby private wells by the
Gaston County Health Department before May 1990 indicated that the groundwater was
contaminated with TCE. The highest concentration ofTCE {IO 1.4 pg/L) was detected in a sample
collected from the private well located at 24 I 9 Davis Park Road, 200 feet south of the Davis Park
Auto Repair facility (located at 2307 Davis Park Road). The current EPA Drinking Water Maximum
Contaminant Levels (MCLs) for TCE and PCE are 5 pg/L. Current State (NCDEHNR) MC Ls for
TCE and PCE arc 2.8 pg/Land 0.7 pg/L, respectively.
Groundwater samples were collected from the contaminated wells along Davis Park Road and within
the Cedar Oak Park subdivision by the Environmental Services Division of EPA on 6 July 1990.
TCE was detected at concentrations of82 and 81 pg/Lin groundwater sampled from the private well
located at 2419 Davis Park Road and Cedar Oak Park subdivision wells, respectively.
NOR/K:\WP\20064\048\RAROOl .DOC 2-3
This document was prcpar<'d h_\· RoyF. Weston, Im:., e.\prt'S\ly for U.S. EPA. It shall not be n-kased or disclosed in whole or in part without
the cxprcss, written pl'rmis~ion of U.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Remedial Action Report
Davis Park Road TCE Sile
Date: Fchmary 200 I
OCN: RFW048-2A-AllMX
Additional investigations and groundwater sampling events prior to the initiation of the RI continued
to reveal levels of contaminants ahove State and Federal drinking water standards. Investigation
activities focused on a possible source location(s) and several potential sources of the contamination
at the Davis Park Road TCE site have been considered. Other identified cases of known
contamination located near the Davis Park Auto Repair facility include the Homelite Division of
Textron, Inc. facility located southeast of the site, and the New Haven Drive TCE site located south
of the site. These were identified in the May 1993 Site Inspection Addendum report prepared by
NCDEHNR and in the 1998 RI report. These reports indicate that after consideration of proximity,
regional and local groundwater 0ow directions, and groundwater sample analytical data, the most
likely contaminant source is the Davis Park Road Auto Repair facility.
As a result of these findings, and in an effort to further define the source area for the water supply
well contaminants, environmental assessments were conducted, including the Site Inspection
Addendum (SIA) (May 1993), Expanded Site Investigation (ESI) (May 1994), and RI ( 1996-1998).
Soil and groundwater samples around the Davis Park Auto Repair facility were collected to provide
data for these investigations. Soil samples collected behind the Davis Park Auto Repair Facility
during the SIA and ES! revealed detectable levels of TCE, PCE, and 1,2-Dichoroethene. Soil
samples collected from the same area during the RI did not contain these compounds but did contain
detectable levels of other VOCs. Groundwater samples collected from monitoring wells and
Geoprobe borings located immediately adjacent to the Davis Park Auto Repair facility during the RI
investigation did not contain VOCs above laboratory detection limits.
The RI report summarizes the source investigation as follows: " .... according to data generated from
this and previous investigations, solvents such as PCE or TCE were introduced to the environment
from the property at 2307 Davis Park Road. This 'spill' migrated through the vadosc zone and the
saprolitc/partially weathered rock aquifer, and into the bedrock aquifer. Once introduced into the
environment, various biophysiochcmical processes have acted on the contaminants to reduce the
overall concentration as well as spread the contaminant mass throughout various matrices. Currently,
the VOC contaminants, principally TCE and PCE, appear to be present only within the bedrock
NOR/K:IWP\200641048\RAR00l .DOC 2-4
This document was prepared b)-' RoyF. \Vcston, Inc., c.,pressly for lJ.S. EP,\. It shall not be rl'IC'ascd or disdoscd in wholl' or in part without
the express, written permission of U.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Remedial Action Report
Davis Park Road TCE Sile
D.ilc: February 200 I
DCN: RFW04~2A-AIIMX
aquifer and may continue to he drawn towards active residential wells scattered throughout the site,
specifically those wells to the west of Davis Park Road."
2.2.2 Groundwater Plume Concentration and Extent
Groundwater samples collected from monitor wells during the RI investigation ( I 998) contained
levels ofTCE ranging from 8 to 34 pg/L. Other VOCs, including PCE, were detected above State
and Federal Drinking Water guidelines. Groundwater samples were collected from monitor wells,
converted residential wells, and residential wells. Tables 2-1 and 2-2 show the RI sample results.
The extent of the VOC contamination was also calculated within the 1998 RI rep01i. Figures 2-2 and
2-3 display the areal extent of the PCE and TCE plumes within groundwater in bedrock underlying
the site. The areal extent of contamination was based on all samples collected during the 1997/1998
portion of the RI investigation. The TCE contaminant plume, which is larger and encompasses the
PCE plume, is centered along Davis Park Road from Glenraven to Blackwood Creek and underlies
areas approximately 500 feet to the east and west of Davis Park Road.
2.3 CONTAMINANT HEALTH CONCERNS
The Federal government, specifically EPA, has set a drinking water standard of 5 ftg/L forTCE and
PCE. The State of North Carolina has set a drinking water standard for PCE at 0.7 pg/Land forTCE
at 2.8 pg/L. Data published by the Agency for Toxic Substances and Disease Registry, U.S.
Department of Health and Human Services details the human health effects of these two compounds.
Studies on animals have indicated that these compounds can be classified as carcinogenic to humans
and will also cause human nervous system disorders. Direct exposure to high levels ofTCE or PCE
may cause dizziness, headache, sleepiness, confusion, nausea, difficulty in walking and speaking,
possible unconsciousness and death.
NORIK:\WP\20064 \048\RAR001. DOC 2-5
This document was pri'parl'd by RoyF. Weslon, Inc., express!)-' for U.S. EPA. II shall not he released or disclos(•tl in whole or in part without
the e,press, written permission of U.S. EPA.
----- --- ------ --Thill document was prepared by R0y F. Weston, Inc., expres:,ly tor EPA It shall no! be dls(:10$1:!'d, In whole or In part, wrt:t,out the express wrrt:ten permissK>n ol EPA
Well ID: 054
Date Samnled: 05107/96
Volatile Onzanlc Com,.,.,unds MCL1 MCL1 "g/L
I, 1-Dichlorocthene 7 7 -
l, I -Dichlorocthanc 700 s -
eel l,2-Dichloroethcnc 70 70 -
T richlorocthene 2.8 s -
T ctrachloroethenc 0.7 s -
Chloroform 0.19 100 ¥J&M.£h
1,1, I-Trichloroethane 200 200 -
Bromodichloromethane NL 100 5.8A
Dibromochloromethane NL 100 0.:58AJ
Carbon Disulfide NL NL -
Methoxymethvlcrooane NL NL -
Table 2-1
Residential Well Anal)tlcaJ Data Summary -May 1996 Preliminary Investigation
Volatile and Semi-Volatile Organic Compounds, Pesticide/PCB Compounds, Metals
Davis Park Road TCE Site
Gastonia, North Carolina
096 100 108 121 m 131 ISO 170
05/07/96 05/07196 05/07196 05107/96 05/06196 05/07/96 05/07/96 05/07/96
"g/L "g/L "g/L "g/L "g/L "g/L "g/L "g/L
------1.6 ----------0.571 ---1.6A -------iM!~~fof 0.92AJ ntli.'@h~: ---0.66AJ -------------------------------------------l.81 ----2.41 ----------
172 177 181 187 195
05/07/96 05/07/96 05/07/96 05/07196 05/07/96
"g/L "g/L "g/L "g/L "g/L
-------- --------1.7A ----?flPi'.15 2.6A -
------------------------------1.3 ----------
-ID 2n n1 rn m n, m m m m 2~ • m = w
Date Samr led: ######## ######## ######## ######## ######## ######## ######## ######## ######## ######## ######## ######## ######## ########-
Volatile O1'l!anlc Compounds MCL1 MCL2
I, 1-Dichloroethene 7 7
1, 1-Oichlorocthanc 700 s
ci.s 1,2-Dichlorocthene 70 70
Trichloroethenc 2.8 s
T ctrachlorocthene 0.7 s
Chloroform 0,19 100
1,1, 1-Trichloroc:thanc 200 200
Bromodichloromethane NL 100
Thbromochloromcthane NL 100
Carbon Disulfide NL NL
Methoxymeth..,.lprooane NL NL
Notes:
1North Carolina Adminirnative Code, Sub<;haptet 2L Maximum Contaminant Level
2sare Drinking W&ter Act Maximum Contaminant Level
A-Average Value
J = estimated value
N "' pRtUmptive Mdmee of pn,RIIC• of material
•-_.material wu analyzed for but not detected
NL-not listed
Shaded v.lues indicate \iolation ofJtate MCL
uglL • microg:ram1 per liter
K:\wp\20064\048\rar001•tbls.XLS Table 2-1
3.8 0.66AJ
0.:52AJ
o.62AJ \tl'l:ef&li\
7.8 1.2A
·-2.21
40/N
2-6
211
05/07/96
"g/L ------------
--
--- - ------------ -
This document was prepared by Roy F. Weston, Inc., expressly for EPA. It shalt not be disclosed, in whole or in part, without the express wrrrten permission of EPA.
Volatile Organics (µg/1) MCL1 MCL' MW-ID
EPA Method 8260 01113/98
Acetone 700 NL -
Acrylonitrile NL NL -
Ally! Chloride NL NL -
Benzene I 5 -
· Bromobenzene NL NL -
Bromochloromethane NL NL -
Bromodichloromethane NL so• -
Bromoform 0.19 so• -
Bromomethane NL NL -
2-Butanone NL NL -
N-Butylbenzene NL NL -
Sec-Butyl benzene NL NL -
Tert-Butylbenzene NL NL -
Carbon Disulfide NL NL -
Carbon Tetrachloride 0.3 5 -
Chlorobenzene 50 so• -
Chlorodibromomethane NL so• -
Chloroethane NL NL -
2-Chloroethyl Vinyl Ether NL NL -
Chloroform 0.19 so• -
Chloromethane NL NL -
2-Chlorotoluene NL NL -
4-Chlorotoluene NL NL -
l,2-Dibromo-3-Chloropropane 0.025 0.2 -
1,2-Dibromoethane NL NL -
Dibromomethane NL NL -
1,2-Dichlorobenzene 620 600 -
1,3-Dichlorobenzene 620 600 -
1,4-Dichlorobenzene 75 75 --
Dichlorodifluoromethane 1400 NL -
1, 1-Dichloroethane 700 NL -
l ,2•Dichloroethane 0.38 5 -
1, l •Dichloroethene 7 7 -
K:\wp\20064\048\rar001-tbls.XLS Table 2-2
Table 2-2
Groundwater Samples -Bedrock Aquifer
Analytical Summary
MW-20
Da"is Park Road TCE Site
Gastonia, North Carolina
MW-3D MW-4D CW-I CW-5
01/14/98 01/13/98 01/15/98 01/14/98 01/14/98
83 -- - -- - - -
-
------ -- - - - -- ------- - -------
--- ---- ----
--- - --· ------ - - ---
-------
- ----- -----
- ----
--- - ---- ----- - - - -- - - --
--- - -- - - - -- - - --
- -- - -- --- -
- -- - ---- - -
--------- - ---- -- - -- -------- -- - -
-- - --
CW-6
01/16/98
---------
·--
-
--
-
-
-
----
-
-------
·--
--
-
-
PW-I PW-2 PW-3 EMW-1 Detection
02/10/98 02/10/98 02/25/98 02/10/98 Limit
- - --50
----- -5
------5
-----5
-- ---5
- - --5
- - ---5
- ----5
--- -IO
- -·--IO
-- - -
5
·-- ---5
- -- -5
----.. 5
- - -
--5
- --.. 5
- -----5
- --.. IO
- - - -IO
- -- -5
- - ---IO
·-- -
--5
- -- -5
-------5
--- -5
------5
- - --5
- - --5
- -- -5
- - -
-IO
------5
-- - -5
- -
---5
-----~-----~--------------------------
2-7
-
---- ---------This document was prepared by Roy F. Weston, Inc., expressly for EPA. !t shall not be disclosed, in whole or in part, without the express written permission of EPA
Volatile Organics (µg/1) MCL' MCL2 MW-ID
EPA Method 8260 01/13/98
cis 1,2-Dichloroethene 70 70 -
trans 1,2-Dichloroethene 70 80' -
1,2-Dichloropropane 0.56 5 -
1,3-Dichloropropane NL NL --
2,2-Dichloropropane NL NL -
1, 1-Dichloropropene NL NL -
cis 1,3-Dichloropropene NL NL -
trans 1,3-Dichloropropene NL NL -
cis 1,4-Dichloro-2-Butene NL NL -
trans l,4-Dichloro-2-Butene NL NL -
Ethylbenzene 29 700 -
Ethyl Methacrylate NL NL -
Hexachlorobutadiene NL NL -
2-Hexanone NL NL --
Iodomethane NL NL -
lsopropylbenzene NL NL -
p-lsopropyltoluene NL NL --
Methacrylonitrile NL NL -
Methylene Chloride 5 5 --
Methyl Methacrylate NL NL --
4-Methyl-2-Pentanone NL NL -
Methyl tert-Butyl Ether 200 NL -
Naphthalene 21 NL -
Pentachloroethane NL NL -
n-Propylbenzene NL NL -
St)Tene 100 80' -
1, I, 1,2-Tetrachloroethane NL NL -
l, 1,2,2-T etrachloroethane NL NL -
T etrachloroethene 0.7 5 -
Toluene 1,000 80' -
1,2,3-T richlorobenzene NL NL -
1,2,4-T richlorobenzene NL 70 -
1, I, I-Trichloroethane 200 200 -
K:\wp\20064\046\rar001-tbls.XLS Table 2-2
Table 2-2
Groundwater Samples -Bedrock Aquifer
Analytical Summary
MW-2D
01/14/98
------
---------------
--------
Davis Park Road TCE Site
Gastonia, North Carolina
MW-JD MW-4D CW-I
01/13/98 01/15/98 01/14/98
- - ----
- - ----- - -- - -------
- - -- - ------ - -
---
----- ------- ------- -- - -- - --- -
42 -14
- - ----
----- - ------- -
:21::w.etN - - -- - - -- ---- - - -- ---
2-8
CW-5
01/14/98
-----
----------
-
----------------t?YiJW~~?;
---
8
C\\'-6 PW-I
01/16/98 02/10/98
--
- -- -- -- ------- ------- ----
--------- ------ -- ---- -
------ ----- -
---
--
--x~.:>JJttr - -- -- -- -
-- ----
PW-2 PW-3 EMW-1 Detection
02/10/98 02/25/98 02/10/98 limit
-- -5
- --5
-- -5
- - -5
-- -5
-- -5
--- --5
---5
- ---5
- - -
5
----5
----5
- - -5
----10
-- -5
- --5
-----5
- --5
-- -10
- - -5
- - -
10
-- -5
- - -5
- -
-5
- --5
---5
-- -
5
- - -5
-----5
---5 - - -5
- - -5
- - -5
-- - - - --------
This document was prepared by Roy F. Weston, Inc., expressly for EPA. It shall not be disclosed, in whole or in part, without the express written permission of EPA.
Vol a tile Organics (µg/1) MCL1 MCL' MW-ID
EPA Method 8260 01113/98
NL 5 -
Table 2-2
Groundwater Samples -Bedrock Aquifer
Analytical Summary
MW-2D
Davis Park Road TCE Site
Gastonia, North Carolina
l\IW-3D MW-4D CW-I CW-5
01114198 01/13198 01115198 01/14198 01114198
- - - - -
CW--0 PW-I
01/16198 02110198
- -
--
PW-2 PW-3
02110198 02125198
--I, 1,2-T richloroethane
Trichloroethene 2.8 5 -Lk!Zk& -- -~tz~=~ -illiAtSi#httJb@rnm~,athf«
Trichlorofluoromethane 2100 NL -- -
1,2,3-T richloropropane NL NL - - -
1,2,4-Trimethylbenzene NL NL - --
1,3,5-Trimethylbenzene NL NL -- -
Vinyl Acetate NL NL - - -
Vinyl Chloride 0.015 2 --- -
Xylene (Total) 530 80' -- -
1North Carolina Administrative Code, Subchapter 2L Maximum Contaminant Level
2Safe Drinking Water Act Maximum Contaminant Level
- ---- ---- -- -
--
80* indicates 1994 proposed rule: total for all trihalomethanes combined cannot exceed the 80 µg/1 level
MW -Monitor well sample
CW -Converted residential well sample
DW -Investigative derived waste sample
Shaded values indicate exc~dence of state MCL
K:\wp\20064\048\rar001-tbls.XLS Table 2-2 2-9
-- - --- --- -------- -
-- ---- --- - ----- -
-- -
-~----------
---
EIIIW-1 Detection
02110198 Limit
-5
-5
-5
-5
-5
-5
-10
-10
-5
-------------------
$ MW-40
(ND)
OA\.'1S PARK /
AUTO REP.-JR SHOP
(OfT MAP)
MW-55 (ND)
DAVIS PARK ROAD TCE SITE
GASTONIA, GASTON COUNTY, NORTH CAROLINA
OAK CIRCLE LEGEND
-----ESTIMATED AREAL EXTEHT OF PCE ('5uo/L) IN B£11ROO< AQUIFtR.
{J2) lETRAOILOROEll-lENE CONCENlRATIONS IN UG/L
MW-1 $ VIEl.L LOCATIONS.
(ND) NOT DElECTED.
--- - -- ---------_, - - -
DAVIS PARK /
AUTO REPAIR SHOP
(OFF MAP)
$ MW-40 (ND)
>-z z w
DAVIS PARK ROAD TCE SITE
GASTONIA, GASTON COUNTY, NORTH CAROLINA
,..cw-e
"'(ND)
MW-!IS,,. . (ND)--.,. _/ I
/
' \ MW-1S \ $(ND) ' \ $MW-10 \ (ND)
\ \ I
\ I I .
\ I
11 I' 1' I!.
11
MW-2S \i.
(ND)~l
PW-1 ~
$(16)
_;--
. SL>,C\(WQOQ-cRf.EK
LEGEND
(32)
ww-1$
(NO)
ESTIMATED AREAL EXTENT Of' TCE (&,g/1.) IN BEDRoa< A0U1FER.
TRl0-ILOR0El)i£NE CCINCENTRA11ari!S IN UC/L
MONITOR VIEU. LOCA~
NOT DElECTED.
TCE CONCENlRA TION ISOPLETH MAP
1997 /1998 FIELD INVESTIGATIONS -------f;;DR"'A:;:;\INNo,======::::irunArnTEC.:,-==-=--TninE~S.:.-E~NG:r..,~~~rnniiAT~D~~~wu,oi'"';-'ii,Non"'.,::----1
M. SNEED 7 /23/98 20064-0411-100-01
FIGURE 2-3 CHECKED, APPROVED• CAD FILE NAMEt
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
2.4 DESCRIPTION OF THE ROD
Remedial Action Report
Dc1vis Park Road TCE Sile
Date: February 200 I
DCN, RFW04R-2A-AIIMX
The ROD for the Davis Park Road TCE site was produced in September 1998. The description of the
remedy as written in the ROD is as follows:
EPA has selected Alternative 3 as the groundwater remedy for this site. The remedy
includes connecting all homes, churches, and businesses in the 'Davis Park Road Area' .... to
the City of Gastonia public water supply; optional installation of granulated carbon tilters on
private wells with operation and maintenance of the filter for one year with a tilter
replacement aflcr the first year of operation and a Natural Attenuation study followed by
monitored Natural Attenuation of the bedrock aquifer groundwater plume. Groundwater
monitoring will be conducted on a quarterly basis for three years and annually for the next 27
years."
This remedy addresses the principle threat posed by the site, which is exposure to the underlying
contaminated groundwater. The goal of the RA is to limit exposure to groundwater contaminated
above risk-based standards and to restore groundwater to below risk-based standards.
The major components of the selected groundwater remedy include:
• Reduction of Groundwater Exposure; connection of homes, churches, and businesses in the
Davis Park Road Site area to the City of Gastonia public water supply;
• Optional wellhead treatment for affected private wells;
• Natural attenuation to restore the contaminated aquifer to the lower of either the Maximum
Contaminant Levels (MCLs) or North Carolina Part 2L Drinking Water Requirements. The
primary attenuation processes occurring at the Davis Park Road TCE Site are dispersion and
intrinsic biodegradation;
• Continued analytical monitoring for contaminants in groundwater; and
• Development of contingency plans to respond to differences in the actual perfonnanec of the
remedy and actual site conditions, as compared to the expected pcrfonnance of the remedy
and expected site conditions. Additional infonnation will be collected during the first year of
the Remedial Design effort in order to support the predicted dispersion and intrinsic
NORIK:IWP\20064\048\RAR001.00C 2-12
This clol't1mcnt was prepared h)'· RoyF. Wl'slon, Inc .. t'\.prcssl~· for lJ.S. EPA. It shall not he rdcast'd or disclosed in whole or in parl without
the Cl.pn-ss, written p<'rmission of U.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Remedial Action Rcpor1
Davis Paik Road TCE Silt:
Date: Fehrnary 200 I
DCN: RFW048-2A-AllMX
biodcgradation rates for the contaminated groundwater. The contingency plans may include
the implementation of institutional controls, modifications to the monitoring program, and
implementation of the contingency remedy, if necessary.
The contingency remedy includes:
• Reduction of Groundwater Exposure; connection of homes, churches, and businesses in the
Davis Park Road Site area to the City of Gastonia public water supply;
• Optional wellhead treatment for affected private wells;
• Ground\vatcr pump and treat using a minimum of three extraction wells with treatment of
contaminated groundwater at the ground surface using activated carbon to remove YOCs.
• Continued analytical monitoring for contaminants in groundwater.
This RA report discusses the connection of the public water supply system, carbon filtration system,
and the abandonment of on-site residential water supply wells only.
EPA also formulated groundwater remediation goals for the entire site based on requirements for risk
reduction, risk-based remediation levels derived in the Baseline Human Health Risk Assessment, and
applicable, relevant, and appropriate requirements. The goals are presented in Table 2-3.
Table 2-3
Remediation Goals for Groundwater at the Davis Park Road Site
CONTAMINANTS OF MAXIMUM REMEDIATION
CONCERN DETECTION. GOAL (pg/L) BASIS
(pg/L)
Tetrachlorocthene (PCE) 14 I CRQL (NCGS 0. 7 11g/l)
Trichloroethenc (TCE) 34 2.8 NC 2L GS
I, 1-Dichloroethene ( 1,1-DCE) 3.8 7 SDWA, NC 2L GS
Chloroform (CLFM) 40 I CRQL (NC 2L GS -0.19 11g/l)
Methy-tert-butyl ether (MTl3E) 709 200 NC 2L GS
Notes: SDWA-Federal Safe Drinking Water Act, CRQL-Contract Required Quantitation Limit; NC 2L GS -
North Carolina Administrative Code Subchapter 2L Groundwater Standard
NOR/K:\WP\20064\048\RAROO 1.DOC 2-13
This document was prepared by RoyF. Weston, Inc., express!~· for U.S. EPA. It shall not he reh."ased or di.~dosed in \\hole or in part without
lhe express, wriltcn permission of U.S. EPA.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Remedial Aclion Report
Davi:,; Park Road TCE Site
Date: Fchruary 200 I
DCN: RFW048-2A-Allt-.lX
According to the ROD, "The remediation goals were selected as the most conservative of the
chemical specific ARARs or the health-based risk goals. The contract required quantitation limit
(CRQL) was chosen if the chemical-specific ARAR was below this limit. The background
concentration would have been selected as the remediation goal if it had exceeded the risk-based
goal, as is the normal procedure."
2.5 STATUS OF REMEDIAL ACTION
The installation of water lines throughout the Davis Park Road site was begun on 23 May 2000. The
main supply line, water meter housing and pressure reduction valve (PRY) installations to 64
residences were completed on 11 August 2000 (see Figure 2-4). The City of Gastonia set all water
meters into the housings during the week of 18 August 2000. Connection of the water meter and the
PRY to the service line has been completed to all residences that requested the switch from
groundwater supply wells to the municipal supply. ll1e water distribution lines were all installed in
the highway right-of-way and no individual easements were required. Each homeowner signed an
casement agreement for his/her service line when he/she agreed to accept the potable water service.
The final connections were completed on 9 September 2000. Final "as-builts" of the water line were
delivered to the City of Gastonia in February of 2001.
The installation of carbon filtration units was begun on 13 July 2000 apd was completed on 4 August
2000. Five units were assembled at five residences. The carbon filtration units were connected to the
residential water supply as soon as the plumbing assembly was completed. Figure 2-5 presents the
location of the carbon filtration units.
Residential well abandonment was initiated on 21 August 2000, and 17 wells were abandoned by
25 August 2000. In addition, one residential well was converted into monitor well CW-7. Abandoned
and converted wells arc depicted on Figure 2-6.
NORIK:\WP\200641048\RAR00 1.00C 2-14
This documenl was prepared h~· RoyF. \Vcslon, Inc., expressly for U.S. EPA. It sh:1II not he released or disclosed in whole or in parl wilhout
the express, ,uillen p{'rmission of U.S. EPA.
---------~----~----
~
lib
f'1 QI
GJ
/Ji mt ;
[]
I]
B
/i1
Fil
{i'
(l "' c::::> "-..
/j /J ~ q
Iii II
ff/ //==~~=~
0
111 "" ljJ I Gil """ llu .
D
Gil G;J ~
DAVIS PAR!< ROAD
CiJ CJ lliiiiil
~
Ill el C
a&
fl 0
/j lfJ
IN ()
@J
MOORE"s TRANSMISSION SHOP
0
B
~ /J 0 g
•
liil
0
0"
13
I] ,
w ~ 0 0 ~ 0
~ ~ • ~ •
Iii ◊
a
DAVIS PARK ROAD TCE SITE
GASTONIA, GASTON COUNTY, NORTH CAROLINA
FIGURE 2-4
LEGEND
RESIDENCE
RESIDENCE CONNECTED TO Cll'Y WATER SEPTEMBER 2000
• •·
---------~---------
~
®
@
{§)
~ @ N Bl g
~
Q 0
2411i10PR.
<if}
CJ ~
[/ {JJ
0 '" 0 ,1J
fl} [:]
/jJ
El
[jJ
0
"
@
0
q
Q CZ' "' .
!J I)
(J //==~~==d
Q
Cl
[fJ r:::, EJ W oe □ .
D
IE] E:J CZ]
DAVIS PA.RI< ROAD
[§ [=::J 13
E'!:;:] -
LEGEND
RESIDENCE
RESIDENCE SUPPLIED •Nrn-t CARBON AL TR>.TION UNITS
MOORE'S
lRANSMISSICW SHOP -Iii
Q
""c:is .. ~ ll.:l lJlrJ I 27170PR O
0
0
B
f!J1
CJ
Dl!ll:I ~ fJ
PURJTAJ\I sr. q m ID /!J
0
i G ~ Q ◊ Q □• ~ Q < ; El m I " ~ •
QI 00 ◊
a
DAVIS PARK ROAD TCE SITE
GASTONIA, GASTON COUNTY, NORTH CAROLINA
111
"
Q
...,,_
~ ~
DESIGNERS/CONSULTANTS
l--------------~=~R~E~S~ID~E~N~C~E==s~U~P~P=U~E~D=Wl~lH=~c~A~R~B~O~N=-=Fl~L~TR~A~TI~O~N,,,,..,,.U~N~l=rs=tJnsoR~A~~l"LL-E~R~D~~~/~12~/-0~1""rwwi~o~~~~~3-~0~4=8~-=oo~,=_~o,~4-0-I
AUGUST 2000 DES. ENG.; DA TE;
FIGURE 2-5
---------~---------
/jJ
tu
&
Ii)
@
fl
~
fiiJ &
CJ
El --•
tt:li ~ Ii!!
fJ/
0
rs CZJ 1cu
lili! a::i 1il:iiJ
DAVIS PARK ROA.D
~
fiJ /!J 0
0 /j/
/II 0
IJJ fJ
/fl 0
Bl
~
·= TRANSMISSlar. SHOP
◊
\!I
/JP 0
i 0
C ,
J • "
Bl
[]o [ill
[;) □
0 00
DAVIS PARK ROA.D
I "'1c,c, [!2] o~C!J
[J "'
Ill ■ c ~
PURITAN sr. l:lQ Ill El
1.11 IP /1iilll13
• ~ C ~ 0
0
i •
◊
'ill' a
DAVIS PARK ROAD TCE SITE
GASTONIA, GASTON COUNTY, NORTH CAROLINA
FIGURE 2-6
CiJ
LEGEND
RESIDENCE
RESlOENCIAL WELLS ABANDON AUGIJST 2000
RESIOENCIAL WELLS CONVERTED TO
MONITORJING WEl.LS AUGUST 2000
ELECTRICITY ANO SURFACE PIPING REMOVED
ONLY, WELL NOT AEIANOONEO
Oo
l ' i rs lo
IJ
If • -4ft>
~ ~
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I.
I
I
SECTION 3
REMEDIAL ALTERNATIVES REVIEW
Remedial Action Rep011
Davis Pal'k Road TCE Site
Date: Fehruary 200 I
DCN: RFW0,18--2A-Allt-.lX
This section provides a review of the ROD selected remedial alternatives for this site. The
alternatives include providing an alternate source of potable water from an uncontaminated source
such as the City of Gastonia Public Water Supply or installation of a water treatment system to each
well or household within the zone of contamination. Review criteria for these alternate methods were
treatment performance, capital cost, operating cost, health effects, level of effort required by user,
long tenn monitoring requirements, and miscellaneous benefits (fire protection, adequate quantity of
supply, consistent pressure).
3.1 CONNECTION TO MUNICIPAL SUPPLY
Potable water lines were immediately adjacent to the affected area within a twelve-inch line on Davis
Park Road. Figure 3-1 depicts the pre-existing 12-inch main along Davis Park Road, the main
extension, and the newly installed distribution lines for the adjacent streets. The proximity of the 12-
inch main rendered connection to the line the most cost-effective solution. A connection to the City
of Gastonia water distribution system provides a considerable range of benclits to the individual
homeowner. The North Carolina Department of Environment and Natural Resources (NCDENR)
regulates treatment performance. The municipal treatment system utilizes a surface raw water supply
(Mt. Island Lake), which is monitored on a daily basis and generates a high quality potable water on
a volume basis ( 15-16 million gallons per day) using a conventional and cost ellicient treatment
process (sedimentation, flocculation, and dual media filtration).
The risk of negative health effects from using the municipal supply is considerably less than any
source using groundwater. The source and effluent are sampled daily and the characteristics of the
finished water must be reported to the NCDENR on a monthly basis and to the customers on an
annual basis. EPA requires that each supplier of finished water annually provide a report to
customers that includes a comparison of the average characteristics of their linished water to Safe
NOR/K:\WP\20064\048\RAROO 1.DOC 3-1
This document was prepared by Roy F. Weston, Inc., cxpr{'sSIJ for U.S. EPA. It shall not he rt'least•d ordisclosl'd in whole or in par1 n·ilhout
the e.,prcss, wrillen p{'rmission of U.S. EPA.
.-----------------------------------------------------------------7 I I J I I I -NORTH I I • I I I I I I I I I -•-------I I l "~,-.fc-s~ o o O 0 00 0 0 cf:? oo#~ l) ,1>-~ "'"' D 0 0 v \S 00 RICHLAND AVENUE (\\~l DAVIS PARK__/\) AUTO REPAIR ~ @ @ 0 D \ D 0 GLENRAVEN AVENUE ~ ~10100~0 e· ~ \) ~ ~ \ ~\ ~ 0 ezi 0 1'21 □0 D D z 0 <:) D ~ '"'a;, 9, <;; -f-r::i I 6-~ ~\ 5• #" . 0 ~'i5-. !Zlt;;\ 0 ~I>-~:~ ,,.,~ \\ < \ II TAYLOR MEMORIAL □ 12.l~ # ~ ~~ .,:n:..?'·~ <a t0 ~ii ~ -0 ~ ~~ ~\ \) C>.6" '<-i:0 ~ 0 ~ "~"" '""7 z ~ 1b "~ilei ~-~0 Q, 1, i;;i •. <@,· s"\I','-~~~~ ~ ~ I ~o\l>-"# ~ · · ~ t ~ ~ 0 I) 0 0 0° o PROPOSED NEW DISTRIBUTION LINES '0' . ~ B~N ~ ~ 10 t •\ ~ ~ ~ . ~ 6!2, ~ ~ . ~ ' 0~ ~ ~ ~ ~ -~ e· -~ 10 @, \\ -= ::C------\'1 PRE-EXISTING END DF 12" MAIN I 'e3 • = ] ~ • ~ ~ BARNS ____ _ _____ _ __________________ BARNO __ +~~ @ __ ~ BARN ~\ -~'0 D "-~'f, f,j D ;,.. z z r:!J w D 0 D {) oo 0 NE\\\.Y INSTALLED END DF 12" MAIN ~ BLACKWOOD CREEK LEGEND CRrn< CENlERIJNE. EXISllNG ROADS. EXISTING STRUCTURE5. EXISllNG HOMES TO RECEIVE REMEDIAL OPTIONS. -PRE-EXISTING 12" MAIN. -EXTENDED 12" MAIN. -NEW DISTRIBUTION UNE5. <( wz 1-_J -0 VJ er: o<C <Cu O:i: 0:: I-:,,:: 0:: 0:: 0 <Cz Cl.. -<( en-_z >o <( I-ocn <( c., 0 ... a I 0 0 I c, O'.J 3: 6 ~ •. I we::: o,q--::10 Z (0 lLaJ .oar--oo o.-~N c'.3::: a ----N N Q:'. ~6 •• _j z " -w ~~ . < w ~ •W □-, □ z 0 Fen ::::> z !!! 0 ~U) I VJ z ,,, c~w X ~ CW e> c.:: z <(W z z:J <( :::i: z 0 (ij 5 w Q:'. o•-> Q:'. a.. <{ w /-<{ 0 ""'I > w Q:'.
I
I
I
I
I
I
I
I
p
D
g
m
I
I
I
Remedial Aclion Report
Davis Park R(;;id TCE Site
Date: Fchruaf)' 2001
DCN: RFW048-2A-AIIMX
I
Drinking Water Standards. An example of that report, the Annual Water Quality Report (A WQR) for
1999, is attached as Appendix A. The A WQR addresses the health effects of any constitubnt that is
greater than 50% of the maximum level allowed by the standard.
The inherent monitoring procedures for the municipal water supply will more than satisfy any
requirement for long tenn monitoring of the water provided to homeowners. Each iLividual
I
household will also receive the additional benefit of fire protection for the neighborhood, an
increased quantity of available water at a consistent water pressure (estimated at 70 polunds per
square inch at the street), and the dependability of a municipal water supply system (e.g.l standby
equipment, full time maintenance crews, and interconnections for redundant supply).
The physical appurtenances that were required include a water distribution line along the edge of the
street, a¾ inch service tap, and a meter box (with an isolation valve, a water meter, and a!pressurc
reducing valve on the "customer side" of the box). Water meters were purchased by the c,\ntractor
during the installation phase and were delivered to the' City as part of the construction conJact. The
meters were set by City crews in order to assure that proper billing accounts for each reside!1ce were
established.
The tenns of the arrangement with the City of Gastonia for the connection of the homes in the zone
I
of contamination are that the EPA will fund the desi!,'11 and installation of a potable water distribution
system, obtain a utility easement for the main line, and transfer the line and easement to th1 City of
Gastonia per an appropriate agreement/memorandum of understanding between EPA and th~ City of
Gastonia. Individual homeowners will become a utility customer of the City and will be resbonsiblc
I
for the maintenance of the service line between the house and the street right-of-way.
The water line is designed to comply with standards of the City of Gastonia Engineering Department.
The City Engineering Department reviewed the plans and specifications for compliance bdfore the
waterline project was advertised for bids. Individual homeowners were required to providJa utility
casement at no cost, establish an account with the City prior to connection, and pay for the wlter they
use at nonnal rates (Out of City Rates).
NORIK:\WP\20064\048\RAR001.DOC 3-3
This dorumcnl was prcparcd by RoyJ,', Wi'ston, Inc., l':i.prcs.~ly for U.S. EPA. It shall nol be rC'leased or disdost•d in whoh·or in part withoul
the c,prcss, written permission of U.S. EP,\, I
I
I
I
I
I
0
I
I
I
I
I
I
I
I
I
I
3.1.1 Pressure Distribution Model
Remedial Action Report
Davis Park R1oad TCE Sile
Date: Fchmab· 2001
IX:N: RFW048-2A-All~1X
The preliminary design discussed the possibility of using only 12-inch main and 8-inch distribution
lines for the waterline network around the Davis Park Road site. Cost reduction cffr,rts for \his stage
of the design included the perfonnance ofa pressure distribution model to verity installink smaller
diameter distribution pipes, including 6 and 2 inch diameter pipes, instead of a portidn of the
previously proposed 8-inch lines. In addition, the model was run for the distribution system\with and
without fire protection demands. The inlet pressure (R-1) was set for 70 pounds per square inch at
the current pipeline along Davis Park Road. Model results indicated that flow and pressJe along
each line would be more than sufficient for either system with fire protection and nonnal reLdential
demand. A schematic of the distribution system and the results of the model runs arc prcslntcd as
Appendix B. \
The City of Gastonia accepted the results of the distribution model as they pertained to tire flow but I
commented that they would prefer all distribution lines to be at least 6 inches in diameter. ·~he City
indicated that 2-inch lines intermixed with larger sizes (6-inch and larger) would potlntially
experience low flow rates during nonnal service demand. They indicated that some of tlJ water I
would be trapped between the 6-inch lines resulting in low water volume turnover, a drop in chlorine
I
residual and reduced overall water quality. A review of flow rates in the pipes in question (P-9, P-10,
P-16, and P-14) indicated that flow rates arc very low (15, 17, 7, and 8 gallons per 1binute,
respectively) during steady state demand. In periods oflow usage, flow rates would drop even\ lower.
Therefore, 6-ineh lines were installed, as depicted in Figure 3-1, to provide better quality wl1ter.
3.2 PROVIDING WATER TREATMENT UNITS FOR INDIVIDUAL WELLS OR
HOMES
Potential viable treatment approaches for individual wells or households, including carbon filtration
I
using cartridge or tank and bag units, were considered. The treatment goal as specified within the
ROD was to reduce the trichlorocthylcnc (TCE) from the groundwater to a level less than 2.8 pg/L
and PCE to a level less than I pg/Lon a consistent basis. Levels ofTCE in the groundwater within
NOR/K :I WP\200641048\RAR00 1. DOC 3-4
This documcnl was prepared b~, RoJF, Wcslon, Inc., expressly for lJ.S. EPA. It shall not hl' rt'll'asl'd or disdosl·d in whole or in part without
the expm<, w,Hten pern,;s,;on of U.S. EPA. I
I
I
I
I
n
I
I
I
I
I
I
I
I
I
I
I
I
I
Remedial Ac1inn Kcport
Dilvi:,; Park Road TCE Sile
Dale: Fcbrua~y 200 I
DCN: RFW{t8-2A-AIIMX
I
the zone of contamination have ranged from 3 to 34 pg/L with an average of about 15 pglL. Levels
of PCE in the groundwater within the zone of contamination have ranged from 0.66 to I\ pg/L.
Carbon filtration units with a capacity of IO gallons per minute (gpm) for a single residence were
determined to be the most economically and technically efficient groundwater treatment s~stem. A
IO gpm carbon filtration unit is a five-cartridge unit (each unit rated at 2 gpm) with l1 valved
I
manifold for changing cartridges. Each cartridge is 20 inches long by 7 inches in diameter. r'he five
cartridges are mounted on a wall bracket that is attached to the wall of the well house. A drawing of
the anangement of the units is attached as Appendix C.
The 10 gpm system requires a space approximately 30 inches long by 24 inches wide by 30 in.:hcs
high for installation and operation. The pcrfonnance of this system is dependent on Jeriodic I
replacement of the cai1ridgcs to prevent breakthrough. Based on a IO gpm flow rate, the live
cartridge system requires cartridge replacement once every six months for the residences at thb Davis
Park Road site. The spent cartridges may be disposed of as household hazardous waste or as Lgular
whd was<c. I
EPA provided for the design, installation, and one year's maintenance of five carbon filtration units
at the Davis Park Road site. Maintenance of the filtration units includes initial and qu.\rterly
sampling and analysis of each unit's influent and efiluent, and two cartridge filter exch,lnges.
Homeowners will continue to pay for all costs associated with supply of their water. At the en~ of a
one year period, the homeowner will assume responsibility of all costs associated with filtratio11 unit I maintenance, and cartridge replacement. Based upon the first year of sample analysis results, a
conservative cartridge replacement schedule may be developed. Homeowners will alsb be
I
responsible for sampling and analysis of their water supply a11er the initial one year period, if they
desire it.
3.3 LAND REQUIREMENTS
In order to construct and maintain the water distribution lines, property owners were required to
release an utility casement to EPA for its use during constrnction. The easement is turned over 1)1he
NOR/K:IWPl200641048\RAR001.DOC 3-5
This dot'umenl was prepared h)' RoyF. Wl'slon, Inc., C).pressl)· for U.S. EPA. It shall nol be n>J{'ascd or disclosl·d in whole or in p:irt withoul
the express, wrillen permission of U.S. EPA. \
I
I
I
I
I
I
I
I
I
I
I
H
I
I
I
I
I
I
\
Remedial Action Kcport
Davis i•ark R~)ad TCE Sile
Dale: Fchrna;y 200 I
DCN: RFW0r2,\-AIIMX
City of Gastonia for line maintenance. Service lines to each home extend from the edge off1c street
right-ot:way to the home. Propc11y owners arc responsible for maintenance of the service lines.
3.4 QUARTERLY MONITORING
Within the ROD for the Davis Park Road site, EPA selected Alternative 3 as the groundwater
remedy for this Site. The remedy includes connecting all homes, churches and businesses i)the area I
of the groundwater plume as depicted by Figures 2-2 and 2-3 of this report to the City of Gastonia
public water supply; optional installation of granulated carbon filters on private wells with 01Lration
and maintenance of the filter for one year with a filter replacement after the first year of opdration;
and a Natural Attenuation study followed by monitored Natural Attenuation of the bedrock Jiquifcr
g,m md wa<c, ph•" ,c \
The Natural Attenuation study includes groundwater monitoring that will be conducted on a
quarterly basis for three years and annually for the next 27 years. The first year of quarterly sa~pling
I
will be augmented to include parameters necessary to complete the Natural Attenuation Study.
Groundwater will be analyzed for VOCs as well as necessary groundwater geochemical \data,
hydrogeologic parameters, and other necessary information to complete the Natural Attenuation
Study. Section 6 presents the costs associated with the 3 year quarterly sampling effort. These ~osts I
include effort for sampling personnel, project management and reporting, and expenses associated I with equipment, travel, and report preparation. The report issued to EPA at the end of each quarterly
sampling event will include a description of the sampling procedure, the wells sampled durind the
event, condition of the wells, groundwater geochemical parameter measurements, sample analtsis
results, and current configuration of the groundwater plume.
NORIK:IWP\20064\048\RAR00 1.DOC 3-6
This documt'nl was prepared h)-' RoyF. Weston, Inc., opres.~I)'· for U.S. EPA. It shall not be released or disclosed in whole or in part withoul
the C-'prcs.~. wrillen p{'rmi.~sion of U.S. EPA. \
I
I
I
I
I
I
0
0
I
I
I
I
I
I
I
I
I
I
SECTION 4
DESIGN IMPLEMENTATION
i
Remedial Aclion Report
Davis l'a1 k Ro\1d TCE Site
Date: FchmaTY 200 I
OCN: RFW048-2A-Allt-.1X
I
I
I
This section provides infonnation on the tasks perfonncd to complete the Final Design and a
schedule of activities.
4.1. I Preliminary Design
The Preliminary Design, submitted to EPA and the City of Gastonia on 4 Nove111ber I 999,
represented the initial effort towards the constrnction of drawings used to for111ulatc and co1Jrnc1 the
product. The City of Gastonia and EPA review co111ments on the Prcli111inary Design documlnt were
I
received in late November and early December and arc incorporated herein.
4.1.2 Survey of Property Lines
I I I
I
I I
A certified survey of the land was conducted for installation of the water lines. The properties in this I
project area are developed with single family ho111es and one 111ulti-fa111ily housing unit. Utilities at I
the residences include electricity, septic tanks, and water lines fro111 local water supply wells. To
accurately locate the water line and potential right-ot~way, all houses and utilities within thh Davis
Park Road site were located and surveyed. Final survey results were received on I Decembdr 1999.
4. I .3 Revised RA Cost Estimate
I
I
Within the Pre-final Design, a refined estimate of the costs required to constrnct and to 111anagc the
I
constrnction of the remedial options included in this project was provided. The cstima'tc was
reviewed by EPA to detcnninc the feasibility of providing funding for the construction effo~ and to
provide possible areas where the project effort could include financial reductions. The cost eJti111atc
was revised to include a cost comparison between the use of 6-inch and 2-inch diameter pihcs for
certain streets within the site through the potential use of pipes with smaller diameters than prdsented
in the Preliminary Design (refer to Section 3.1.1 ).
NOR/K:\WP\20064\048\RAR001.DOC 4-1
This dornnwnt was prepared by RoyF. Wt•ston, Inc., c:1:prcssly for U.S. EPA. Ir shall not he rl"lcascd or disclosed in whole or in pa'rt without
the l'xpress. wriltl'n permission of U.S. EPA. I
I
I
I
I
I
g
0
I
I
I
I
I
I
I
I
I
I
4.1.4 Pre-final Design and Final Design
Remedial Aclion Rcpor1
Davi~ 1'.11 k Rciad TCE Sile
Date: Fchruar)' 200 I
DCN: RFW048-2A-Allt-.1X
The Pre-final Design included refinement of the design according to comments made on the
Preliminary Design and development of the final parameters of the construction proccsl for the
product. The Pre-final Design was submitted to the City of Gastonia and EPA in DcccmlJer 1999.
Comments on the document were received from the City of Gastonia and EPA in Dccen\bcr and
January, respectively, and were incorporated into the Final Design, the last phase prior to thL release
of the design and supporting documentation to the public for bid consideration. The final deLgn was I
submitted to the public and prospective contractors on 24 February 2000. The contract for Waterline
I
Installation was awarded to Trans-State Construction Company, located in Denver, North Carolina,
and the contract for carbon filtration system installation was awarded to A.E. Drilling, loLted in . I
Greenville, South Carolina. Well Abandonment for residences connected to city water, rcqutsted by I
Gaston County, was awarded to McCall Brothers, Inc., located in Denver, North Carolina. 1
4.1.5 Construction/Installation of Water Lines and Carbon Filtration Systems
The installation of water lines throughout the Davis Park Road site was begun on 23 May 2000. The
main supply line, water meter housing and pressure reduction valve (PRY) installationJ to 64
I
residences were completed on 11 August 2000 (sec Figure 2-4). The City of Gastonia set all water I
meters into the housings during the week of I 8 August 2000. Connection of the water meter tind the I
PRY to the service line was completed to all residences that requested the switch from groundwater
supply wells to the municipal supply. The final connections were completed on 9 September\2000.
Construction design drawings arc included in the finalized "as-built" drawings, provided (nder
separate cover.
The installation of carbon filtration units was begun on 13 July 2000 and was completed on 4 August I 2000. Five units were assembled at five residences. The carbon filtration units were connected to the
I
residential water supply as soon as the plumbing assembly was completed. Figure 2-5 presents the
location of the carbon filtration units. A schematic of the carbon tilter units is providbd as
Appendix C.
NOR/K:\WP\20064\0481RAH001.DOC 4-2
This document was prcpart'd h)' RO)' F. Weston, Inc., c~prcssl)' for U.S. EPA. II shall nol he rdcascd or disclosed in whole or in part wilhoul
the express, written permission of U.S. EPA.
I
I
I
I
I
I
0
I
I
I
I
I
I
I
I
I
I
Remedial Action Rcpm1
Davis Park R1iad TCE Site
Date: Fcbruaf)' 2001
DCN, RFW04><-2A-AllhlX
Residential well ahandonment, requested by the City of Gastonia for residents connected to City I
Water, was initiated on 21 August 200()_ Seventeen wells were abandoned by 25 August 2000. Each
I
surface expression of the water supply well was permanently or temporarily removed while a
concrete mixture was poured into the open borehole of the well. The concrete was brougljt to land
surface and allowed to cure_ Alter the concrete had set at each fonner well location, soil, gr[1ss seed,
and straw were placed over each former well. In addition, one residential well was convJted into I monitor well CW-7, and one well had surface piping and electrical connections removed only, at the
request of the owner. Abandoned and converted wells are depicted on Figure 2-6. I
4.1.6 Water Lines and Carbon Filtration Svstems Operation and Maintenance
Currently, under agreement with site property and homeowners, WESTON and its subcontractors I
will maintain and replace defective equipment along the waterline between the point at which the I
connection was made to the existing home plumbing and the service end of the water meter for a I
period of one year. After this time period has expired, the homeowner will be responsible for I
maintenance of this same line. The subcontractor is also responsible for the maintenance of the main
waterline and all appurtenances for a period of one year, atlerwhich the City of Gastonia will !assume
responsibility. The one-year period is set to expire on 15 September 2001.
WESTON is currently pcrfonning quarterly sampling of the influent and effluent at each carbon
filtration unit for a one-year period. Two carbon filter exchanges at each unit will also be conducted I during this one-year period. An initial round of sampling was performed on 24 August 2000. I
Sampling results indicated ineffective filtration of volatile organic compounds (VOCs) (see Tahlc4-
l ). The granular carbon filters were replaced with block carbon filters and the groundwater iAflucnt
and effluent were rcsampled on 22 September 2000. Detection limits for these samples wtc not
sufficiently low to indicate accurately the effectiveness of the filtration units, and the unit~ were
rcsamplcd on 17 October 2000. The 17 October groundwater samples indicated effective filtjng by
the carbon block filters, with the exception of the 27 l 7DPR location (sec Figure 2-5 for s~mplc
I
locations). Influent and cflluent samples from this location contained levels of PCE and TCE, but
below the respective remediation goals. The 17 October sampling event was considered thlc first
round of quarterly sampling following effective carbon filter installation.
NOR/K;IWPl20064104B\RAR001.DOC 4-3
This d111:uml"nl wi,s J)r<'pand by RoyF. Weston, Inc., c.,prcssl)· for IJ.S. EPA. It shall not he rC'lcasl'd or disclosed in whole or in piirt wilhout
the e,pms, wdtten p,cm;,s;on of U.S. EP,\. I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Carbon Filtration Unit Influent and Effluent
Anarytlcal Results
Sampt. ld•nlllflcation:
Oa111 Samnled:
Parameter {ug/1}
Vo/aUJe Organic Compounds
Benzene
Bromobenzene
Bromochloromethane
Bromodlchloromethane
Bromolorm
Bromomethane
n-Butylbenzene
sec-Bufylbenzene
tert-Butylbenzene
Chlorobenzene
Chlorod lbromomethane
Chloroethane
Chlo1olorm
Chloromethane
2-Chlorotoluene
4-Chlorotoluene
1,2-Dlbromo-3--Chloropropane
1,2-Dlbromoethane
Dibromomethane
1, 2-Dichlorobenzene
1,3--Dichlorobenzene
1,4-Dlchlorobenzene
Dlch!orodl1luoromethc1ne
1, 1-Dichloroethane
1,2-Dichloroethane
1, 1-Dichloroethene
els 1,2-Dichloroethene
trans 1.2-Dichloroethene
1,2-Dlchloropropane
1,3--Dlchloropropane
2,2-Dlchloropropane
1, 1-Dichloroprnpene
Ethytbenzene
Hexachlorobutadiene
lsopropytbenzene
p-lsopropyltoluene
Methylene Chloride
Naphthalene
n--Propylbenzene
styrene
1, 1, 1,2-Tetrach\oroethane
1, 1,2,2· Tetrach!oroethane
Tetrachloroethene
Toluene
1,2,3--Trichlornbenzene
1,2,4-Trichlorobenzene
1, 1, I-Trichloroethane
1, 1,2-Trichtoroethane
Trichloroethene
Trichlorofluoromethane
1,2.3-Trichloropropane
1,2, 4-Trlmethylbenzene
1,3,5--Tr!methylbenzene
Vinyl Chlorkfe
Total Xylenes
cis 1,3-Dichloropropene
trans 1,3-Dichloropropene
Acetone
2-Butanone (MEK)
Carbon Disulfide
Carbon Tetrachloride
2-ChloroethyMnylether
2-Hexanone
4-Methyl--2-Pentanone (MIBK)
1, 1,2-Trlc:hloro-1,2,2-Trlfluoroethane
Methyl T-Butyl Ether (MTBE)
Methyl Acetate
Cyclohexane
Methylcyclohexane
Methyl Butyl Ketone
(m-and/or p-)Xylene
o-Xvlene
Metal• (mg/1)
lrno
~ ,;ol&ct•d 22 S~e<rber 2000
wer• ,,.,lyzed by Prism t,boratories.
~ other H~es ,n,tynd by SESD
A lndlcatu ,v..-.g. value
J lrdcatH Htlmated -~-
NA lncic,1H Not ANolynd
K:\wp\20064\048\rar001-tbls.XLS Table 4-1
Davis Parti: Road TCE Site
Gastonia, North Carolina
Sky11n Sky1oul ...,,. '"""" o,rn,oo 08124/00 0Q/12/00 09112/00
<1,0 <1.0 <50 '" <1,0 <1.0 <,0 <50
<1.0 <1.0 <5.0 <SO
<1.0 <1.0 <5 0 <SO
<1.0 <1.0 <50 <5.0
<1.0 <1.0 '" '" <1.0 <1,0 <50 <5.0
<1,0 <1.0 <5.0 <5.0
<1,0 <1.0 <5.0 <5.0
<1.0 <1.0 <5.0 <5.0
<1.0 <1.0 <50 <5.0
<1.0 <1.0 '" '" <1.0 <1.0 <5.0 '" <1,0 <1.0 <,0 <,0
<1.0 <1.0 '" <5.0
<1.0 <t.0 <50 <5.0
<1.0 <1.0 '" <>O
<1.0 <1.0 <5.0 <5.0
<1.0 <1.0 <5.0 '" <1.0 <1.0 <50 <5.0
'" <1.0 <50 <5.0
<1,0 <1,0 <50 '" <1,0 <1.0 <>O '" <1.0 <1.0 <5.0 <5.0
<1,0 <1.0 <5.0 <5.0
<1.0 <1.0 <5.0 <50
<1.0 <1.0 <5.0 <5.0
<1,0 <1,0 '" <5,0
'" <1.0 <5.0 <5,0
<1.0 <1.0 <5.0 <5.0
<1,0 <1.0 <5.0 <5.0
<1,0 <1.0 <5.0 <50
<1.0 <1.0 <5.0 <5.0
<1.0 <1.0 <5.0 <5.0
<1.0 <1.0 <5.0 <5.0
<1.0 "0 <5.0 <5.0
<5.0 <5.0 <>O <50
NA "' <5.0 <5.0
<1,0 <1.0 <50 <5.0
<1,0 <1.0 <50 <5,0
<1.0 <1.0 <5.0 '" <1.0 <1.0 <5.0 <5.0
<1.0 <1.0 <50 <,0
<1.0 <1.0 <50 <5.0
"0 <5.0 <5.0 <5.0
<1,0 <1.0 <5.0 <5.0
<\.0 <1.0 <5,0 <5.0
<1,0 <1.0 <5.0 <50
<1.0 <1.0 <50 <5.0
<1.0 <1.0 '" '" <1.0 <1.0 <50 <5.0
<1.0 <1.0 <5 0 <5.0
<1.0 <1.0 '" <5.0
<1,0 <1.0 <>O <,0
NA NA <5.0 <5.0
<1.0 <1.0 <5.0 <5.0
<1.0 <1.0 <5 0 <5.0 = <'5 <50 <50
<'5 <25 '" <>O
<2.5 <2.5 <50 <50
<1.0 '" <5.0 <5.0
"' "' '" '" "' "' '" '" <25 <2.5 <>O <>O
"0 <1.0 "" "" 7.0A 7.1A NA NA
<50 <5.0 NA NA
'" <1.0 "' NA
<1,0 <1-0 "' NA
<2.5 <25 "' "' <1.0 <1.0 "' "' <1.0 <1.0 NA NA
NA "" NA "'
4-4
Sky31n
10/17100
<1.0
<1.0
.:;1_0
'" '" '" <1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
'" <1.0
<1.0
<50
"' <1.0
<1.0
<1,0
'" <1.0
<1.0
<5.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
"' <1.0
<1.0
<'5
<25
<2.5
'" NA
"" <2.5
<1.0
5.2A
<5.0
<1.0
<1.0
<2.5
<1,0
<1.0
<0,080
""'"" ...,.. """"" 10117/00 01/24101 01124/01
<1,0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <\.0
<1.D <1,0 <1,0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 '" <1.0 ~ <1.0 "0
<1.0 <1.0 <1.0
<1.0 <1.0 <1,0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1,0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1,0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
"0 <1,0 <1.0
<1,0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<5.0 <>O <5.0
"' "' "' <1.0 <1.0 <1.0
<1.0 <1.0 '" <1.0 <1.0 <1,0
<1.0 <1.0 <1.0
<1.0 <1.0 <1,0
<1.0 <1.0 <1.0
<5,0 <5.0 <5.0
<1.0 <1.0 <1.0
<1,0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
"' NA NA
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
<25 <25 <25
<'5 <25 <25
<2.5 <2.5 <2.5
<1.0 <1.0 <1,0
"' "' "' "" "' "' <25 <25 <2.5
<1.0 <1,0 <1.0
<1.0 5.8A 4.3A
<5.0 <5.0 <5 0
<1.0 <l.0 <1.0
<1.0 <1.0 <1.0
<2.5 <25 <25
<1.0 <1.0 <1.0
<1.0 <1.0 <1.0
NA NA NA
I Table 4-1
Carbon FIitration Unit Influent and Effluent
Analytical Results
I Davis Park Road TCE Site
Gastonia, North Carolina
Sample ldentlflc:lltioo: 24111DPR1in 2411DPR20UI 2HIIOPR2in 24111DPR2out 24HlDPR31n 2o418DPIUout 24111Dl'R41n 241110PR4out
Date Samnled: 08/24/00 ""''"" o,n,,,. Ofl/22100 10117/00 10/17/l'JO 01124101 01124/011
I Parameter {ug/1)
Vo/af//e O,vanlc compounds
Benzene <1.0 <1,0 <5,0 <5.0 <1.0 <1.0 <1.0 <1.0
Bromobenzene <1.0 <1.0 <>O <5.0 <1,0 <1.0 <,0 <1.0
Bromoch loromethane <1.0 <1.0 <SO <5.0 <1.0 <1.0 <1.0 <1,0
I BromodK:hloromethane <1.0 <1.0 <SO <>O <1.0 <1.0 <,0 <1.0
Bromoform <,0 <1,0 <5.0 <SO <1.0 <1.0 <1,0 <1,0
Bromomethane <,0 <1.0 <>0 <,0 <1.0 <1.0 <1.0 <1.0
n-Butylbenzene <1,0 <1.0 <5.0 <5,0 <1.0 ., 0 <1.0 <1.0
sec-Butylbenzena <1.0 <1.0 <> 0 <SO <1.0 ., 0 <1.0 <1.0
terl-Butylbenzene <1.0 <1.0 <>O <SO <1,0 <1.0 <1.0 <1.0
Chlorobenzene <1.0 <1.0 <5,0 <5.0 <1,0 <1.0 <1.0 <1.0
Chlorodibromomethane <1,0 <1.0 <5.0 <5.0 <1.0 <1.0 <,0 <1,0
Chloroethane <1.0 <1.0 <,0 <,0 <1.0 <1.0 <1,0 <1.0
Chloroform <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
I Chloromethane <1.0 <1.0 <>0 <>O <1.0 <1,0 <1.0 <1,0
2-Chlorotoluene <1.0 <1.0 <5.0 <5,0 <1.0 <,0 <1.0 <1.0
4-Chlorotoluene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
1,2-Dibromo-3-Chloropropane <1.0 <1.0 <,0 <,0 <1.0 <1.0 <1.0 <1.0
1,2-Dibromoethane <,0 <1.0 <5.0 <5,0 <1.0 <1.0 <1.0 <1,0
Dlbromomethane <1,0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
1,2-Dk:hlorobenzene <1.0 <1.0 <SO <SO <1.0 <1.0 <1.0 <1.0
1,3-Dichlorobenzene <1.0 <1.0 <SO <5.0 <1.0 <1,0 <1.0 <1.0
1, 4-Dichlorobenzene <1.0 <1.0 <SO <5,0 <1.0 <1.0 <1.0 <1,0
Dk:hlorodinuoromethane <1.0 <1.0 <>0 <,0 <1,0 <1.0 <1.0 <1,0
1, 1-Dichloroethane <1.0 <1.0 <>O <5.0 <1.0 <1.0 <1.0 <1.0
1,2-Dlchloroethane <1.0 <1.0 <50 <5.0 <1.0 <1.0 <1.0 <1.0
1, 1-Dichloroethene ., 0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
els 1,2-Dichloroethene <t,O <1,0 <50 <50 <1.0 <1.0 <1.0 <1.0
trans 1,2-Dlchloroethene <1.0 <\.O <SO <5,0 <1.0 <1.0 <1.0 <1.0
1,2-Dlchloropropane <1.0 <1.0 <5.0 <5,0 <1,0 <1.0 <1.0 <1.0 n 1,3-Dlchloropropane <1.0 <1.0 <SO <5,0 <1.0 <1.0 <1.0 <1.0
2,2-Dichloropropane <1.0 <1.0 <SO <>O <1,0 <1.0 <1.0 <1,0
1, 1-Dichloropropene <1.0 <1.0 <50 <5.0 <1.0 <1.0 <1.0 <1,0
Ethylbenzene <1.0 <1.0 <50 <5.0 <1.0 <1.0 <1.0 <1.0
Hexachlorobutadlene <1.0 ., 0 <5.0 <5.0 <1.0 <1.0 ., 0 <1,0
B lsopropylbenzene <1.0 <1.0 <>O <5.0 <1.0 <1.0 <1.0 "<1,0
p-l110propyttoruene <1.0 <1,0 <5,0 <5,0 <1.0 <1.0 <1.0 <1.0
Methylene Chloride <SO <5.0 <> 0 <5,0 <5.0 <SO <>O <>O
Naphthalene "" "" <5.0 <5.0 "" "" "" NA
n-Propylbenzene <1.0 <1.0 <SO <5.0 <1.0 <1.0 <1.0 <1.0
D styrene <1.0 <1.0 <5.0 <50 <1.0 <1.0 <1.0 <1.0
1, 1, 1,2-Tetrachloroethane <1.0 <1.0 <5.0 <>O <1.0 <1.0 <1.0 <1.0
1, 1,2,2-Tetr.a.chloroethane <1,0 <1.0 <>O <5.0 <1.0 <1.0 <1.0 <1.0
Tetrachloroethene <l.O ., 0 <5.0 <SO <1.0 <1.0 ., 0 <1.0
Toluene <1.0 <1.0 <5,0 <50 <1.0 <1.0 <1.0 <1,0
D 1,2,3-Trichlorobenzene <5.0 <5,0 <SO <5,0 <5.0 <5.0 <5.0 <5.0
1,2,4-Trlchlorobenzene <1.0 <1.0 <50 <50 <1.0 <1.0 <1.0 <1.0
1, 1, 1-Trlchloroethane <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
1, 1,2-Trichloroethane <1.0 <1.0 <50 <>O <1.0 <1.0 <1.0 <1.0
Trichloroetnene 2.3A 2.<A <5.0 <5.0 2.4A <1.0 2.6A <1.0
T lichlorolluoromethane <1,0 <1.0 <,0 <,0 <1.0 <1.0 <1.0 <1.0
1,2,3-Trlchloropropane <1.0 <1.0 <5.0 <5,0 <1.0 <1.0 <,0 <1.0
1,2,4-Trimethylbenzene <1.0 <1,0 <5.0 <SO <1.0 <1.0 <1.0 <1.0
1,3,5-Trimethylbenzene <1.0 <1.0 <5,0 <5.0 <1.0 <1.0 <1.0 <1.0
Vinyl Chloride <1.0 <1.0 <,0 <>O <1,0 <1.0 <1.0 <1.0
I Total Xylen~ "" NA <5.0 <5.0 "" "" "" "" els 1,3-Dk:hloropropene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
trans 1,3-Dichloropropene <1.0 <1.0 <5.0 <5.0 <1,0 <1.0 <1.0 <1,0
Acetone .,, .,, <50 <50 .,, <2S .,, .,,
2-Butanone (MEK) .,, .,, <>O <,0 .,, <2S <25 .,,
I Carbon Disulfide <2., <2' <50 <50 <2., <2.S <2., <2.S
Carbon Tetrachloride <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1,0 <1.0
2-Chloroethylvinylether "" "" <,0 <,0 NA "" "" NA
2-Hexanone "" "" <>O <,0 "" "" "" NA
4-Methyl-2-Pentanone (MlBK) <2., <2.5 <,0 <,0 <2.5 .,, <2.5 <2.,
I 1, 1 ,2-Tlichloro-1,2,2-Trifluoroethane <1.0 <1.0 NA NA <1.0 <1.0 <1.0 <1,0
Methyl T-Butyl Ether (MTBE} <1.0 <1.0 NA NA <\.O <1.0 <1.0 <1.0
Methyl Acetate <5.0 <SO NA NA <5.0 <5.0 <5.0 <5.0
cyclohexane <1,0 <1.0 NA "' <1.0 <1.0 <1.0 <1.0
Methylcyelohexane <1.0 <1,0 "" "' <1.0 <1.0 <1,0 <1,0
Methyl Butyl Ketone <2.5 <2., "" NA <2.5 <2,5 <2.5 <2.,
I (m-and/or p-)Xylene <1.0 <1.0 "" NA <1.0 <1,0 <1.0 <1.0
o.Xvlene <1.0 <1.0 "" "" <1.0 <1,0 <1,0 <1.0
Metals (mg/I)
I '"'" "" "" NA NA <O 080 NA NA ""
II
I
Sa~ cola~.c:1 22 Sepl-2000
-• analynd by Prism LaboratoriH.
Al 0lhet ~ afllll)'zed by SESD
A fndcates aYefllg• value
J indin!es estimated valie
I K:\wp\20064\048\ra
~ lndica!H t.aot Anal)'~
r001-tb1s.XLS Table 4-1 4-5
I
I
I
I
I
I
I
I
D
0
D
D
u
I
I
I
I
Table 4-1
Carbon FIitration Unit Influent and Effluent
Analytical Results
Davis Park Road TCE Site
Gastonia, North Carolina
Sampl• ld~ation: 2717DPRNER1ln 2717DPRHER1out 2717DPANER2in 27170PRNER2oul 27t7DPR3in 2717DPR3oul 2717DPR4in 271701'R4out
Date sam.,led: 01112"100 08/24/00 09/22/00 Dla/22/00 10/17/00 10111,00 01124101 0tf24/0t
Parameter (ug/I)
VolaCl/e Organic Compound•
Benzene
Bromobenzene
Bromochloromethane
Bromodichloromethane
Bromoform
Bromomethane
n-Butylbenzene
sec-Butytbenzene
tert-Butylbenzene
Chlorobenzene
Chlorodibromomethane
Chloroethane
Chloroform
Chloromethane
2-Chlorotoluene
4-Chlorotoluene
1,2-0ibromo-3-Chloropropane
1,2-0lbromoethane
Oibromomethane
1 ,2-Dich lorobenzene
1,3-Dichlorobenzene
1, 4-0ic:hlorobenzene
Dichlorodlfluoromethane
1, 1-Dlchloroethane
1,2-Dichloroethane
1, 1-Dichloroethene
cis 1,2-Dlchloroethene
trans 1,2-Dlchloroethene
1,2-Dlchloropropane
1,3-0ichloropropane
2,2-Dlchloropropane
1, 1-Dichloropropene
Ethyl benzene
Hexachlorobutadiene
lsopropylbenzene
p-lsopropyltoluene
Methylene Chloride
Naphthalene
ri-Propylbenzene
Styrene
1, 1, 1,2-Tetrachloroethane
1, 1,2, 2-T etrach!oroethane
T etrach1oroethene
Toluene
1,2,3-Trichlorobenzene
1,2,4-Trlchlorobenzene
1, 1, 1-Trichloroethane
1, 1,2-Trlchloroethane
T rlchloroethene
Trlchlorofluoromelhane
1,2,3-Trlchtoropropane
1,2,4-Trlmethylbenzene
1,3,5-Trimethylbenzene
Vinyl Chloride
Total Xylen~
cis 1,3-Dichloropropene
trans 1,3-Dichloropropene
Acetone
2-Butanone {MEK)
Carbon Disulfide
Carbon Tetrachloride
2-ChloroethyMnylether
2-Hexanone
4-Methyl-2-Pentanone (MIBK)
1, 1,2-Trichloro-1,2,2-Tnnuoroethane
Methyl T-Butyl Ether (MTBE)
Methyl Acetate
Cyclohexane
Methylcyclohexane
Methyl Butyl Ketone
{m-and/or p-)Xylene
o-Xvlene
Metal• (mg/I)
'""
S..~ colected 22 Se-pterm. 2000
were analyzed by Prism Labonilories.
,-, other S11mpiH -lyzed by SESO
1'. lndle11!e-s ---~ ...... -...,
J irdeale-s estimated vaue
N1'. lndcalH Not Nlalyzed
K:lwp\20064\048\rar001-tbls.XLS Table 4-1
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
'" <1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<5,0
NA
'" "' <1.0
<1.0
2.2A
<1,0
"' <1.0
<1.0
<1.0
2.8A
<1,0
<1.0
<1.0
<1.0
<1.0
NA
<1.0
<1.0
<25
<25
<2.5
<1,0
NA
NA
<2.5
<1.0
<1.0
"' <1.0
<1.0
"·' <1.0
<1.0
NA
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1,0
<1,0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<5.0
NA
<1.0
<1.0
<1.0
<1.0
1.4A
<1.0
"·' <1.0
<1.0
<1.0
2.0A
<1.0
<1.0
<1.0
<1.0
<1.0
NA
<1.0
<1.0
"' "' <2.5
<1.0
NA
NA
"' <1.0
<1.0
<5.0
<1.0
<1.0
<2.5
<1.0
<1.0
NA
,so
<5.0
,so
,so
"' '" <5.0
"' <5.0 ,so
"' '" <5,0
'" ,so
"' '" "' "' <SO
<SO
"' '" ,so
"' ,so
"' <5.0
"' "' <5,0
"' "' "' "' <5.0
"' "' <5.0
<5.0
"' <5.0
"' ,so
,so
"' "' "' <5.0
"' "' <5.0
"' '" "' "' "' <SO
'" '"' <5.0
'" '" '" NA
NA
NA
NA
NA
NA
NA
NA
NA
4-6
<5.0
<SO
"' ,so
,so
'" "' ,so
<5.0
<5.0
"' "' ,so
'" '" "' '" ,so
<5.0
"' '" "' "' <5.0
,so
,so
,so
<5.0
<S.O
,so
<SO
<5.0
<5.0
<5.0
"' <5,0
'" "' <SO
<5.0
<5.0
"' "' <5,0
<5.0
"' "' "' "' '" "' <5.0
"' '" "' "' <5.0
"' '" '"' <5.0
'" '" '" NA
NA
NA
NA
NA
NA
NA
NA
NA
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
"' <1,0
<1.0
<1.0
<l.O
<1.0
<1.0
"' NA
<1.0
<1.0
<1.0
<1.0
0.68AJ
<1,0
"' <1.0
<1.0
<1.0
0.79AJ
<1.0
<1.0
<1,0
<1.0
<l.0
NA
<1.0
<1.0
<25
"' <2.5
<1.0
NA
NA
"' <1.0
<1.0
"' <1.0
<1.0
"·' <1,0
'"
<o oao
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1,0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1,0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<5.0
NA
<1.0
<1.0
<1.0
<1.0
O.SSJ
<1.0
<5.0
<1.0
<1.0
<1.0
0.55J
<1.0
<1.0
<1.0
<1.0
<1.0
NA
<1.0
<1.0
"' "' <2.5
<1.0
NA
NA
<2,5
<1.0
<1.0
"·' <1.0
<1.0
"·' <1.0
<1.0
NA
2.0A
<1.0
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
"' '" <1.0
<1.0
<1.0
<1.0
<1.0
<1.0
'" <1.0
<1,0
<1,0
<1.0
"' <1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
"' NA
<1.0
<1.0
<1,0
<1.0
1.8A
<1.0
<5.0
<1.0
<1.0
<1.0
2.1
<1.0
<1.0
<1.0
<1.0
<1.0
NA
<1.0
<1.0
"' "' <2.5
<1.0
NA
NA
"5
<1,0
<1.0
"' <1,0
<\.0
"' <1.0
<1.0
NA
<1.0
<1,0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1.0
<1,0
<1.0
<1.0
1<1 0
1<1.0
:<1.0
<1,0
:<1,0
1<1.0
i"1.0
"' :::::
<1,0 I tt.O
(1,0
<1,0 I <5,0
INA
' 11.0
f1.0
<1.0 I ~1.0
1,.2A
<1,0 I <5.0 ' <1.0
' <1,0
' <1.0 ,:.2A
<1.0 ' <1.0
' <1.0
' <1.0
o;r3J
f" <1.0 ' <1,0 ?5
"' <2.5
<1.0 NA NA
<2.5
<1.o
<1.o
<~.o
<),0
<1.0
"P <),O
<1,0
I NA
I Table 4-1
Carbon FIitration Unit Influent and Effluent
I
Analytical Results
Davis Park Road TCE Site
Gastonia, North Carolina
Sampl9 h:Mntilkation: 2t37DPR1in 2837DPR1oul 2837DPR2in 28370PR20UI 2837DPR3in 2S370PR~ 18370PR4ln 2837DPR4oul
Date Sam.,led; oon-oon-Ol'2VOO """" 10/17/00 10J17/00 10117/00 1w11100 I
I Parameter {ug/1)
Vo/at/le Organic Compound•
Beniene <1,0 <1.0 <5,0 <5.0 <1,0 <1.0 <1.0 <1.0
Bromobenzene <1.0 <1.0 <50 <50 <1.0 <1,0 <1,0 <1.0
Bromochloromethane <Ul <1.0 <50 <50 ., 0 ., 0 <1,0 <1.0
I Bromodichloromelhane <1.0 <1.0 <S 0 <5.0 <1.0 <1.0 <1.0 <1.0
Bromolorm <1.0 <1.0 <50 <50 <1.0 <1.0 <1.0 <,0
Bromomethane <1.0 <1.0 <,0 <,0 <l.0 <1.0 <1,0 ., 0
n-Butylbenzene <t.O <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 .,,
sec-Butylbenzene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <t.0 <1.0
I tert-Butylbenzene <1.0 <1.0 <5.0 <5.0 <1,0 <1.0 <1,0 ., 0
Chlorobenzene <1.0 <1,0 <5 0 <50 <1,0 <1,0 <1,0 <1.0
Chlorodlbromomethane <1.0 <1,0 <5,0 <5.0 <1,0 <1,0 <1.0 <1,0
Chloroethane <1.0 <1.0 <,0 <,0 <t.O <1.0 <1.0 <1.0
Chlo1olorm <1.0 <1.0 <50 <5.0 <1.0 <1,0 <1.0 <1.0
I Chloromethane <1.0 <1.0 <,0 <,0 <1.0 <1.0 <1.0 <t.O
2-Chlorototuene <1.0 <1,0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
4-Chlo1ototuene <1.0 <t.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
1, 2-Dibromo-3-Chloropropa ne <1.0 <1.0 <,0 <,0 <1.0 <1.0 ., 0 <1.0
1,2-Dibromoethane <1,0 <1.0 <50 <5,0 <1.0 <1.0 <1.0 <1,0
I Dibromomethane <1,0 <1.0 <50 <5 0 <1.0 <1.0 <1,0 <1,0
1,2-Dlchlorobenzene <1.0 <1.0 <5 0 <5.0 <1.0 <1.0 <1,0 <1.0
1,3-Dlchlorobenzene <1.0 <1.0 <5.0 <5.0 <1,0 <1.0 <1.0 <,0
1,4-Dichlorobenzene <1.0 <1.0 <5.0 <50 <1.0 <1.0 <1.0 <1.0
Dichlorodlftuoromethane <1.0 <1.0 <,0 <,0 <1.0 <1.0 <1.0 <1.0
I 1, 1-Dlchlo1oethane <1.0 <1.0 <5.0 <50 <1,0 <1.0 <1.0 <1,0
1,2-Dichloroethane <1.0 <1,0 <50 <50 <1.0 <1,0 <t.O <1,0
1, 1-Dlchloroethene <1.0 <1.0 <5 0 <5.0 <\.O <1.0 <1.0 <1,0
tis 1.2-Dichloroethene <1.0 <1,0 <5 0 <50 <1.0 <1,0 <1.0 <1,0
trans 1,2-Dlchloroethene <1.0 <1,0 <5 0 <5.0 <t.O <1.0 <1.0 <1,0
I
1,2-Dk:hloropropane <1.0 <1,0 <5 0 <5.0 <1.0 <,0 <1.0 .,,
1,3-Dlchloropropane <1.0 <1.0 <5 0 <5.0 <1.0 <1.0 <t.O <1.0
2,2-Dithloropropane <1.0 <1,0 <50 <50 <1.0 <1.0 <1.0 <t.O
1, 1-Dichloropropene <1.0 <1,0 <5.0 <50 <1.0 <1.0 <1.0 <1,0
Ethylbenzene <1.0 <1,0 <5.0 <5.0 <1.0 <1,0 <1.0 <1.0
Hexathlorobutadiene <1.0 <1.0 <5.0 <50 <1.0 <,0 <1.0 <\.O
lsopropylbenzene <1.0 <1.0 <5.0 <50 <1.0 <1.0 <1.0 <,0
p--lsopropyltoluene <1.0 <1.0 <50 <5.0 <1.0 <1,0 <1.0 <1.0
Methylene Chloride <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5,0
Naphthalene "' "' <5.0 <5.0 "' "' "' "' n-Propylbenzene ., 0 <1,0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
I styrene <1,0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
1, 1, 1,2-Tetrathloroethane <1.0 <1.0 <5.0 <5,0 <1.0 <1.0 <1.0 <1.0
1, 1,2,2-Tetrathloroethane <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1,0
T etrathloroethene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
Toluene <1,0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
I 1,2,3-Trlthlorobenzene <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5,0 <50
1,2,4-Trithlorobenzene <1.0 <1.0 <5,0 <5 0 <1.0 <1.0 <1,0 <1.0
1, 1, 1-Trk:hloroethane <1.0 <1.0 <50 <50 <1.0 <1.0 <1.0 <1.0
1, 1,2-Trk:hloroethane <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
Trithloroethene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
I Trithloronuoromethane <1,0 <1.0 <,0 <,0 <1.0 <1.0 <1,0 <1.0
1,2,3-Trk:hloropropane <1.0 <1.0 <5.0 <50 <1.0 <1.0 <1.0 <1.0
1,2, 4-Trlmethylbenzene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1,0 <1.0
1,3,5-Trimethylbenzene <1.0 <1.0 <5.0 <5.0 <,0 <1.0 <1,0 <1.0
Vinyl Chloride <1.0 <1.0 <,0 <,0 <1.0 <1.0 <1.0 <1,0
I Total Xylenes "' "' <5.0 <5.0 "' "' "' "' tis 1,3-Dithloropropene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1,0 <1.0
trans 1,3-Dichloropropene <1.0 <1,0 <5.0 <5.0 ., 0 <1,0 <1.0 <1.0
Acetone <25 <25 <,0 <,0 <25 <25 <25 <25
2-Butanone {MEK) .,, .,, <,0 <,0 .,, <25 .,, <,S
I Carbon Disulfide <2.5 <2.S <50 <50 <2.5 .,, .,, <2,5
Carbon Tetrachloride <1.0 <1.0 <5.0 <5.0 <1,0 <1,0 <1.0 <1,0
2-Chloroethylvinylether "' "' <,0 <>O "' "' "' "' 2-Hexanone "' "' <,0 <,0 "' "' "' "' 4-Methyl-2-Pentanone (MlBK) <2.5 <2.5 <,0 <,0 <2.5 <2.5 <25 <2,5
1, 1.2-Trlchloro-1,2,2-Tnlluoroethane <1.0 <1,0 "' "' <1.0 <1.0 <1.0 <1,0
Methyl T-Butyl Ether (MTBE) <1.0 <1.0 "' "' <1.0 <1.0 <1.0 <\.O
Methyl Acetate <5.0 <5.0 "' "' <5.0 <5.0 <5 0 <5,0
Gyclohexane <1.0 <t.O "' "' <1.0 <1.0 <1.0 ., 0
Methylcyclohexane <1.0 <1.0 "' "' <1.0 <t.O <1.0 <1,0
u Methyl Butyl Ketone <2.5 Q.5 "' "' .,, <25 <2.5 <25
(m-and/or p--)Xylene <1.0 <1.0 "' "' <1,0 <1.0 <1.0 <1,0
o-Xvlene <1.0 ., 0 "' "' <1.0 <1.0 <1.0 <1,0
MetaJ•(m~)
Iron "' "' "' "' <0.030 "' "' "'
0 Samplu col11<;:1~ 22 Seplembl!f 2000
wen analyzed by Prism Labonitories.
Al other »mpln analyll!d by SESO
" lrdcatH aver.ge value
J indca1H 11'Rirrnoled value
0 K:lwp\200641048\ra
~ indlC11lH Nol Malyllld
r001-tbls.XLS Table 4-1 4-7
I Table 4-1
Carbon Filtration Unit Influent and Effluent
Analytical Results
I Davis Park Road TCE Site
Gastt)nia, North Carolina
Sampl• ldenl:ificallon: Spmg1in _,,,.. SpmgKlnS21n Spm11KinS2oUI Spmg3in Sprngloul Spmg,tln Spmg4oUII
Dil'le Sam~led: 0S/24100 oan-&roo o,mmo o,n,roo 10/17/00 10/17/00 0112.t/01 01/2.U01
I Parameter {ugn)
Volatile 0'1i11111lc Compound•
Benzene <1,0 <10 <50 <5,0 <1,0 <1.0 <1.0 <1.0
Bromobenzene <1.0 <1.0 <50 <5,0 <1,0 <1.0 <1,0 <1.0
Bromoch lorornethane <\.0 "0 <50 <5.0 <1.0 <1.0 <1.0 <1.0
I Bromodlehloromethane <1.0 <1,0 <5.0 <5.0 <1.0 <1.0 <1.0 <1,0
Bromoform <1.0 <1.0 <50 <5.0 <1,0 <10 <1.0 <1.0
Bromomethane <1,0 <1.0 <OO <10 <1.0 <1,0 <1.0 <t.O
n-Butylbenzene <1.0 <1.0 <5.0 <5.D <1.0 <1,0 <1.0 <1.0
sce-Butylbenzene <1.0 <1.0 <50 <50 <1.0 <1.0 <1.0 <1.0
I tert-Butylbenzene <1.0 <1.0 <50 <5 0 <1.0 <1.0 <1.0 <1.0
Chlorobenzene <1.0 <1.0 <5,0 <50 <1.0 <1.0 <1.0 <1.0
Chlorodlbromomethane <1,0 <1.0 <5,0 <50 <10 <1.0 <1,0 <1.0
Chloroethane <1.0 <1.0 '" <,0 <1.0 <1.0 <1.0 <1.0
Chloroform <1,0 <1,0 <50 <5,0 <\.O <1.0 <1.0 <1,0
I Chloromethane <1.0 <1.0 <>O '" <t.0 <1.0 <1,0 <1.0
2•Chlorotoluene <1.0 <1,0 <50 <5.0 <1,0 <1.0 <1.0 <1,0
4-Chlorotoluene <1.0 <1.0 <50 <5.0 <1.0 <1.0 <1,0 <1,0
1,2-Dibromo-3-Chloropropane <1.0 <1.0 <OO <>O <1.0 <1,0 <1.0 <1.0
1, 2-0ibromoethane <1.0 <1.0 <50 <5,0 <1.0 <1,0 <1.0 <1,0
I Dlbromomethane <1.0 <1.0 <5 0 <5.0 <1.0 <1.0 <1.0 <1,0
1,2-Dichlorobenzene <1,0 <1.0 <5,0 <5,0 <1.0 <1.0 <1.0 <1,0
1,3-0k:hlorobenzene <1,0 <1.0 <5.0 <50 <1.0 <1.0 <1.0 <1.0
1, 4-0ichlorobenzene <1.0 <1.0 <5.0 <5.0 <1,0 <1.0 <1.0 <1.0
Dk:hlorod ifluoromethane <\.O <t.O <OO <OO <l.O <1.0 <1.0 <1.0
1, 1-0ic:hloroethane <1.0 <1,0 <50 <5.0 <1.0 <1.0 <1,0 <1.0
1,2-Dic:hloroethane 0.62AJ 0.59AJ <5,0 <50 0.62AJ <1,0 <1.0 <1,0
1, 1-Dichloroethene <1.0 <1.0 <5,0 <50 <1.0 <1,0 <1.0 <1.0
cis 1,2-0ichloroethene <1.0 <1.0 '" <5.0 <1.0 <1,0 0.61AJ <1,0
trans 1,2-Dichloroethene <1.0 <1.0 <50 <5 0 <1.0 <1,0 <1.0 <1.0
1, 2-Dichloropropane <1.0 <1.0 '" <5.0 <1.0 <1,0 <1.0 <1.0
I 1.3-Dk:hloropropane <1.0 <1.0 <50 <5,0 <1.0 '" <1.0 <1.0
2,2-Dichloropropane <1.0 <1.0 <50 <5.0 <1.0 <1,0 <1.0 <1,0
1, 1-Dk:hloropropene <1.0 <1.0 <5 0 <5.0 <1.0 <1.0 <1.0 <1.0
Ethytbenzene <1.0 <1.0 '" "0 <1,0 <1.0 <1.0 <1.0
Hexachlorobutadiene <1.0 <1.0 <5.0 <5 0 <1,0 <1.0 "0 <1.0 n lsopropylbenzene <1.0 <1.0 <5.0 <50 <1.0 <1.0 <1.0 <1.0
p-lsopropyltoluene <1.0 <1.0 <5,0 <50 <1,0 <1.0 <1.0 <1.0
Methylene Chloride "0 <50 <50 <5.0 <5.0 <50 <5.0 <5.0
Naphthalene NA NA <5.0 <5.0 NA NA NA NA
n-Propy!benzene <1,0 <1,0 <5 0 <5.0 <1.0 <1.0 <1.0 <1.0
0 Styrene <1.0 <1.0 <50 <5.0 <1,0 <1.0 <1.0 <1.0
1, 1, 1,2-Tetrachloroethane <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1,0 <1.0
1, t ,2,2-Tetrachloroethane <1.0 <1,0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
T etrachloroethene <1.0 <1.0 '" <50 <1.0 <1,0 <1.0 <1.0
Toluene <1.0 <1.0 <5 0 <50 <1.0 <1,0 <1.0 <1.0
0 1,2,3-Trichlorobenzene <5,0 <5,0 <50 <5,0 <5.0 <5.0 <5.0 <50
1,2,4-Trichlorobenzene <1.0 <1.0 <5.0 <50 <1.0 <1.0 <1.0 <1.0
1, 1, 1-Trichloroethane <t.O <1,0 <5,0 <50 <1,0 <1.0 <1.0 <1.0
1, 1,2-Trichloroethane <1.0 <1.0 <5.0 <50 <10 <1,0 <1.0 <1.0
Trichloroethene 7.4A 7.6A 10 <5.0 8.2A <1.0 8.8A <1.0
Trlthloronuoromethane <1.0 <1.0 '" <10 <1.0 <1.0 <1.0 <1.0
1,2,3-Trichloropropane <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1.0
1,2,4-Trimethy!benzene <1.0 <1,0 <50 <5.0 <1.0 <1.0 <1,0 <1.0
1,3,5-Trlmethylbenzene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1,0 <1.0
Vinyl Chloride <1.0 <1.0 <10 <10 <1.0 <1,0 <1,0 <1.0
Total Xylenes NA NA <50 <50 NA NA NA NA
tis 1,3-Dichloropropene <1.0 <1,0 '" <5.0 <1.0 <1.0 <1.0 <1.0
trans 1,3-Dic:hloropropene <1.0 <1.0 <5.0 <5.0 <1.0 <1.0 <1.0 <1,0
Acetone <25 <.>5 <50 <50 <25 <.>5 <.>5 <.>5
2-Butanone (MEK) <25 <.>5 <10 <10 <25 <25 <25 <25
I Carbon Dlsutlide <2.5 <2.5 <50 <50 <2.5 <2.5 <2.5 <2.5
carbon Tetrachloride <1,0 <1.0 <5.0 <50 <10 <1.0 <1.0 <1,0
2-ChloroethyMnylether NA NA '" <10 NA NA NA NA
2-Hexanone NA NA <10 <10 NA NA NA NA
4-Methyl-2-Pentlnone (MIBK) <2.5 <2,5 <,0 <10 <2.5 <2.5 <2.5 <2.5
I 1, 1,2-Tric:hloro-1,2,2-Trifluoroethane <1.0 <1,0 NA NA <1.0 <1.0 <1.0 <1,0
Methyl T-Butyl Ether (MTBE) <1.0 <1.0 "' "' <1.0 <1.0 <1.0 <1.0
Methyl Acetate <5.0 <5.0 "' "' <5.0 <5.0 <5.0 <50
Cyclohexane <1.0 <1,0 "' NA <1.0 <1.0 <1.0 <1.0
Methylcyclohexane <1.0 <1.0 "' NA <1.0 <1.0 <1,0 <1.0
I
Methyl Butyl Ketone <2.5 <2,5 "' NA <2.5 <25 <2.5 <2.5
(m-and/or p-)Xylene <1.0 <1.0 "' NA <1.0 <1.0 <1,0 <1.0
o-Xvlene <1.0 <1,0 NA NA <1.0 <1.0 <1.0 <1.0
Met.al• (mg/I) ,~, NA NA NA NA 0.087 NA NA NA
I ~rnpli,s ~oled~ 22 September 2000
wer• ana~l'ed by Prism laboralorin.
,-J, other nrnplt,s ana~l'ed by SESO
A lndieatn aYenO;e valua
J Jridcates ntima1ed value
I K:\wp\20064\048\rarOO
NA indie.a!H Not Analyzad
1-tbls.XLS Table 4-1 4-8
I
I
I
I
I
I
I
I
0
u
I
I
I
I
I
I
I
I
I I
I Remedial Action Rcport
Davis Park R'oad TCE Site
Date: FehrnaJ...• 200 I
DCN: RFwo:is..2A~AllrvlX
The second quarterly sampling event was perfonned on 24 January 2000. Analytical results I
indicated continued effective filtration of voes at two of the units (Sprng and 24 l 9DPR). The
' I
influent and cftlucnt samples collected from the 2837DPR location contained no voes. Influent and
effluent samples from the Sky location indicated effective filtering of methyl tel1 butyl cthJ (MTBE) I
in October, but contained similar levels of MTBE (5.8 µg/L and 4.3 µg/L for the inllucnt and
effluent, respectively) when sampled in January. Additionally, influent and eftlucnt samples
collected from the 27 l 7DPR location contained PeE and TeE at similar levels, indicating
ineffective voe filtration. PeE (1.8 pg/L -influent sample, 1.2 pg/L -effluent sam~le) was
detected at levels greater than the remediation goal. The block filters were replaced with ndw filters
on 21 February 2001. A third round of sampling will be completed in April 2001.
NOR/K:\WP\20064\048\RAROOl .OOC 4-9
This documenl was pn-parcd by RO)' F. Wcslon, Inc., c,.prcssly for U.S. •:PA. II sh:111 not he n-lcascd or disclosed in whole or in part witho11t
the npn·ss, written permission of U.S. EPA. I
I
I
I
I
I
I
I
I
I
D
I
0
u
I
I
I
SECTION 5
BASIS OF DESIGN
I
I
Remedial Ac1ion lkp(l11
Davis Paik R!)ad TCE Site
Date: Fcbruar}' 200 I
DCN: RFW048-2A-Alll\.1X
The design criteria for the water distribution improvements and carbon filtration units arc ,\resented I
below. These design criteria confonn to City of Gastonia Standard Details and Specifications dated
I
I June 1997, and general guidelines presented in Section 8 through 8.10 of Recommended Standards
for Water Works, GLUMRB, 1992. The design criteria were revised to address com.1icnts on
preliminary survey and the Preliminary Design document. The goal of the design is to prlvidc the
homeowners a supply of drinking water that results in minimum risk to their health.
I
Figure 3-1 illustrates the locations of the water main and distribution lines. A schematic of'a typical
'
IO gpm carbon filtration unit is included as Appendix C. 1 I
Municipal Water From Citv of Gastonia
Linc Sizes:
Line Type:
Service Linc:
Meter Box:
12-inch water main -825 linear ft
8-inch distribution lines -1,505 linear ft.
6-inch distribution lines -3,305 linear ft.
2-inch service lines -60 linear ft.
Ductile Iron, Class 50 (for 6, 8, and 12-inch line)
PVC AWWA C900 (for 2-inch line)
¾-inch copper, with a corporation stop
Shut-off valve, lockable
I
I 3/4-inch by 5/8-inch meter
I
Pressure reducing valve (located outside street right-ot~,vay and
privately maintained) \
Copper meter setter I
Hydrants: Spaced between 350-600 feet apart -IO required
Location: Street/Highway ROW or utility easement
Utility casement wicl!h: 20 feet
I
NOR/K\WP\200641048\RAR001.00C 5-1 I
This documc-nt was pn-par<'d b~· Roy1'·. Weston, Inc., c:-,.prcssly for U.S. EPA. It shall not he rclc-ased or disdoscd in whol<' or in parl without
the exp.cs,, wdtten pe,m;s,;on of U.S. EPA. I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Target water pressure at tap = 40 psi
Carhon Filtration Svstem
Target water quality:
System sizes:
Filtration Media:
<2.8 µg/LTCE
<I r1g/L PCE
Household = IO gpm
Activated carbon cartridges
Unit Process Arrangement: Parallel flow in single pass
Household System:
NOR/K:\WP\200641048\RAROO 1. OOC
10 gpm
Five 2 gpm-cartridge canisters
¾-inch Schedule 80 PVC piping
¾-inch PVC isolation valves
Wall or sill mounted (indoors)
Cartridge life (up to six months)
5-2
Remedial Action Repor1
Davis Park Rbad TCE Site
Date: Fchruafy 200 I
DCN: KFW04!;-2A-AIIMX
This documt'nl was prt'parl'd by Royf-·. Weston, Inc., nprcssly for U.S. EPA. It shall not he rl'lcased or disclost>d in whole or in part without
the c,pccs,, wdtlcn pmnission of U.S. EPA. I
; --,._ :_,. ~· .
. 'i,:Jrp:::1"!!iczi{'if k iif \.
,,t;;,_.,.,_;;.,.,,., ... "~·•,;,,-,.,, .. ~--:·_.,i,:,•: ".:• -~_.1.>• : ,.1;~ .... -".:-~-~-; ... :r:..:=-·: ~>" A.~. . . . ,,. ·;---.i~-/}"•··';;_,:,·•. ' ·,
. ~ .. , ,• .. t-a:,
' -~:..~ ·~-·
,• ~ ,\:\\
" .
• '. ; .~ ', ... t"
.· )'
I
I
I
I
I
I
I
I
I
0
D
I
I
I
I
I
I
I
SECTION 6
REMEDIAL ACTION COST SUMMARY
I
. I . Rcmcd1al Achon Report
Davis Paik Road TCE Site
Date: Fchru:!ry 200 I
DCN, RFW(r-2A-AIIMX
I
I
Table 6-1 summarizes the construction/installation and operating cost for each of the remediation
ahem atives.
Table 6-1
Summary of Project Costs
!\:lunit.·ipal \Vater
CARBONI Supply
(l\'ith 2 & 6-inch FILTRATION
distribution lines) (10 GPM) [
Construction Cost Per House $5,397 $9,950 I
Total (70 Houses) $345,437 NIA I
Engineering During Construction /Installation (Water $128,478 NIA I line only)
Total (5 houses) NIA $49,750 I
Annual Operating cost (Per House) $0 $2,310 I
Annual Operating cost (5 Houses) NIA $ I 1,550 I
Total Cost for Installation Constmction and I year of $473,915 $61,300 I Operation
Total (both methods) $535,215 I
'
Table 6-2 presents costs associated with quarterly natural attenuation monitoring for a 3-yeJ period.
NORIK:\WP\200641046\RAR001. DOC 6-1
This document was pri'pared b)· Ro)·F. Weston, Inc., t':\pnssly for U.S. EPA. It shall nol bC' released or disclosed in whole or in part wilhoul
(he e,p,ess, wdtten pennission of U.S. EPA. I
I
I
I
ff
u
I
I
I
I
I
I
I
I
I
Work Item
Equipment
Sample Analysis
Personnel
Travel
GRAND TOTAL
NORIK.IWP\20CIB4\048\RAROO 1. DOC
Tahle 6-2
Natural Attenuation Monitoring Costs
Description
Includes PPE, water
geochemical testing
equipment, generator
rental, tubing,
miscellaneous equipment
Groundwater sample
analysis for VOC content
(esl. 23 wells plus 4
QNQC samples)
LOE includes prep. time
for field effo11, field
sampling, and report
preparation
Includes costs for per
diem, rental vehicles, ,md
shipping
6-2
Estimated Costs
($/Quarter)
1,250
4,425
10,580
1,960
18,215
\ Remedial Ac11on Report
Davis Park RP.id TCE Sile
Date: Fcbnra~y 200 I
DCN, RFWOtS.2A-AHMX
I
I
Tolal ($ For\3 Year
Quarkrlv S:impling
Pe~i()(I)
15,000
53,100 '
126,960
23,520
21s,sso \
l his document was prepared h)' RoyF. Weston, Inc., expressly for U.S. t.PA. II shall not he released or tlisdost'd m whole or m part without
Jhe cxpm,, wdlten penn;,s;on of U.S. EPA. I
I
I
I
I
I
I
I
I
I
D
R
u
H
I
I
I
I
I
APPENDIX A
Remedial Aclion Report
Davis Park Road TCE Site
D:ile: Fchruary 200 I
DCN: RFW048-2A-Allr-.1X
CITY OF GASTONIA ANNUAL \VATER QUALITY REPORT FOR 1999 '
NOR/K:\WP\20064\048\RAROO 1.DOC
iiiil iiiii
Violations --The City of Gastonia has not been in violation of any
monitored contaminants in the past 11 years.
Unregulated Contaminants
The City of Gastonia did not test for Cryptosporidium
during the past year.
The City of Gastonia has tested for Radon and none was
found to be present in our drinking water.
The City of Gastonia monitored for Halooctetic Acids in
1999. The range was <0.005 -0.0370 ppm with the
average being 0.0227 ppm.
The City of Gastonia detected three unregulated Volatile
Organic Chemicals:
Chloroform (0.0338 ppm).
Bromodichloromethane (0.0078 ppm)
chlorodibromomethane (0.0011 ppm).
Additional Contaminants Monitored
The City of Gastonia monitored an additional 95
contaminants that were all below detection limits.
The City of Gastonia conducts over 700,000 tests and
readings on our drinking water per year. This testing
helps us ensure that our water is of the highest quality
possible and meets our exceptional standards.
Health Information
To ensure that tap water is safe to drink, EPA prescribe.s
limits on the amount of certain contaminants in water
provided by public water systems. Food and Drug
Administration (FDA) regulations establish limits for
contaminants in bottled water.
Drinking water, including bottled water, may reasonably
be expected to contain at least small amounts of some
contaminants. The presence of contaminants does not
necessarily indicate that water poses a health risk. More
information about contaminants . and potential health
effects can be obtained by calli"9 the Environmental
Protection Agency's Safe Drinking Water Hotline:
-(800°426-4791).
The sources of drinking water (bath tap water and
battled water) include rivers, lakes, streams, ponds,
reservoirs, springs and wells. As water travels over the
surface of the land or through the ground, it dissolves
naturally-occurring minerals and radioactive material, and
con pick up substonce.s resulting from the presence of
animals or from human activity.
-llill Iii) -liiill1
Contaminants that may be present in source water
include:
di Microbial contaminants, such as viruses and
bacteria, which may come from sewage treatment
plants, septic systems, agricultural livestock
operations and wildlife.
•
•
•
Inorganic contaminants. such as salts and metals,
which can be naturally-occurring or results from
urban storm runoff, industrial or domestic
wastewater discharges, _oil and gas production,
mining or farming.
Pesticides and herblcides, which may come from a
variety of sources such as agriculture,
stormwater runoff and residential uses.
Organic chemical contaminants including
synthetic and volatile organics, which are by-
products of industrial processes and petroleum
production, and can also come from gas stations,
urban stormwater runoff and septic systems.
RadiOactive contaminants, which can be naturally-
occurring or be the re.suit of oil and gas
production and mining activities.
In order to ensure that tap water is safe to drink, EPA
prescribes regulations which limit the amount of certain
contaminants in water provided by public water systems.
FDA regulations establish limits for contaminants in
bottled water which must provide the same protection
for public health.
Some persons may be more vulnerable to contaminants
in drinking water than the general population. Immuno-
compromised persons such as persons with cancer
undergoing chemotherapy, persons who have undergone
organ transplants, people with HIV/AIDS or other
immune system disorders, some elderly and infants can
be particularly at risk from infections. These people
should _seek-advice-about drinking-water from their
health care providers. EPA/CDC' guidelines on
appropriate means to le.ssen the risk of infection by
Cryptosporidium and other microbial contaminants are
available from the Safe Drinking Water Hotline
(800-426-4791).
*Centers for Disease Control
-liill
City of
Gastonia
Drinking Water
Annual Water-Quality
Report for
1999
Published June 2000
Depanment of Pub/le Works & Utl/lties
Utlllties Division
-

-
-ll!!!!9 I!!!!! !!!Im How Safe is Our Drinking Water?
WE ARE PROUD TO REPORT THAT THE
WATER PROVIDED BY THE CITY OF
GASTONIA MEETS OR EXCEEDS
ESTABLISHED WATER-QUALITY
STANDARDS.
This brochure explains how drinking water
provided by the City of Gastonia is of the highest
quality. Included is a listing of results from
water-quality tests as well as an explanation of
where our water comes from and tips on how to
interpret the data. This •consumer Confidence
Report' is required by law and we are proud to
share our results with you. Please read them
carefully.
For More Information
Want more facts about your drinking water?
Have questions concerning this report or the
quality of your water?
You can visit the City of Gastonia's website at:
www.cityofgastonia.com
or
Contact:
Lisa Digh at (704 )854-6686.
Yo1.fmay also call aboufthe next opportunity for
public participation in decisions about our
drinking water.
Still want to know more about drinking water?
Visit the U. S. Environmental Protection Agency
(EPA) web site at
www.epa.gov/safewater/
Our Water Source
The City of Gastonia is supplied by surface water
from Mountain Island Lake. Our Puinping Station
is located off highway 273 on Mountain Island
Lake, in northeastern Gaston County near Mt.
Holly, N.C.
liiilil iiiii1 -iiiilii -Mil liiil
The table shows the results of our water-quality analyses from the most recent testing done in accordance with the regulations. Every
regulated contaminant that we detected in the water, even in the most minute traces, is listed here. The table contains the name of
each substance, the highest level allowed by regulation (MCL), the ideal goals for public health (MCLG), the amount detected, the
usual sources of such contamination, footnotes explaining our findings, and a key to units of measurement.
Maximum Contaminant Level or MCL: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close
to the MCLGs as feasible using the best avallable treatment technology.
Maximum Contaminant Level Goal or MCLG: The level of a contaminant in drinking water below which there is no known or
expected risk to health. MCLGs allow for a margin of safety.
Treatment Technique: A required process intended to reduce the level of a contaminant in drinking water.
Action Level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system
must follow.
AL = Action Level
MCL • Maxiirium Contaminant Level
MCLG = Maximum Contaminant Level Goal
MFL = million flt-ers per liter
mrem = millirems per year (a measure of
radiation absorbed by the body)
NTU = Nephelometric Turbidity Units
Contaminant Date
Tested
Detected
Level
Unit
06/11/99 0.174 ppm
Fluoride.2 04/8/99 0.935 ppm
Leod1 06/10/99 4 ppb
Key To Table
MCL
4
pCi/1 = picocuries per liter (a measure of radioactivity}
ppm = parts per million, or milligrams per liter (mg/I}
ppb =-parts per billion, or micrograms per liter (µg/l)
ppt = parts per trillion, or nanograms per liter
ppq = parts per quadrillion, or picograms per liter
TT= Treatment Technique
MCL.G Range Major Source Viole1tlon
1.3
4
0.010-0.174 Corrosion of
galvanized pipes;
Erosion of
natural deposits
0.935-0.935 Water additive.
which promotes
NO
NO
AL•l5 0 <3 -4
strong tee.th
Corrosion of
galvanized pipe..s;
NO
Erosion of
~de.Dosits
, ,_ ~----.. +_ :---, _., ' ', . ,•,. ,,,/ ~--' ~ q:---, " ,,.,_ ;-,, •· •.• ,.,,... ~,,., -~:>::::::·'.:'.2:·•:• __ :::::::::'.;:.:::-::
Gross Alpho 02/08/99
Gross Beta 02/08/99
0.095
1.20
2.40
NTU
pWL
pCi/L
TT n/o
15
4
0
0
0.030-0.095
1.20-1.20
2.40-2.40
Soil runoff
Erosion of
natural de.po.sits
Decay of natural
and man-made.
deoosits
NO
NO
NO
• ••• ., .,, ✓·.-;J;Yy··:.-,· , .. ,(::,;;;:.:;:;:;";': ·::.:. ,:-~·:,· ... ,-:~,-:-,;,:··· ,_;-,--.,;;.;;:: '":;·;; --,w·-:··· ;-:-:;:::;::,:;:,·,-:-:;,,;;::;;::;-;->:,;~:::,;<;:•''i<:::•i:=:se;.:.-;.~:;<->j""i~-W;>:;
TTHM's4 1999 41.9 ppb 100 -0 26.8-67.5 By-product of
drinking water
chlorination
NO
1. Copper and Lead Is the 90" percenWe for samples collected. There were none above the Action Level for either contaminant.
2. Our source water fluoride has been tested to be belO\Y 0.10 ppm.
3. This sample Is the highest of 8,760 turbidities ran on our distribution water. We met the turbidity standard 100% of the year.
•· This repr8$ents a four quarter running average.
Although we ran many tests, only the listed substances were found. They were all below the State and EPA limits.
_,.':..: ,'
I
I
I
I
I
I
g
I
I
I
I
I
I
I
I
I
I
I
I
APPENDIX B
PRESSURE DISTRIBUTION MODEL RESULTS
NOR/K:\WP\20064\048\RAR001. DOC
Remedial Action Rcpm1
Davis Paik Road TCE Site
Date: FchrnaT)' 2001
DCN: RFW048-2A-AHMX
I
I
I
I
I
0
I
I
I
I
I
I
I
I
I
Steady State Analysis
J-7
Skyland Drive (81
P-7 J-6 P-6
P-8
J-8
P-11
Tate Stroot (2")
P-9 J-9
Springwood St10et (6"1!J-;_!l!l---i,-~
Rotan Street (6")
J-
A-1
P-1
J-1
P-14
P-2
J-2
Devis Park Road (12")
P-3
Purrtan Strool (21
J-12
Puritan Street (61
P-17
Penny Pa,1,;; Drive (8")
Davis Paril. Road Site, Rev. 1
Color Coding
Legend
Pressure (psi)
= <o 45.00
49.00 = <• 53.00 = <o 57.00 = 61.00 = <o 65.00 = 69.00 l ___ ~___J 73.00 = TT.00 = <• 61.00 = 85.00 = 69.00
J-<
(1-1/2")
P-9. P-10, P•14, P-16 ., 2", P-a. P-11, P-12. P-13, P-15. P-17 = 6"
Aesioontiat Flow O 10 gpn,/house
Project Title: Davis Park Road Sile
c:\haestad\wtrc\davpk.2.wcd Piedmont Olsen Hensley
Project Engineer: Doug Mooney
WaterCAD vt.5 (041] 12/08/99 11 :28:57 AM (0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
I
I
I
I
I
II
I
I
D
I
I
I
I
I
I
I
I
I
I
Link Length Diamete Material Roughnes Minor Los
Label (ft) (in)
P-1 1.00 12 Ductile In 130.0 0.00
P-2 250.00 12 Ductile Ire 130.0 0.00
P-3 ,050.00 12 Ductile Ire 130.0 0.00
P-4 450.00 12 Ductile tr< 130.0 0.00
P-5 550.00 2 Ductile Ire 130.0 0.00
P-6 450.00 8 Ductile Ire 130.0 0.00
P-7 400.00 8 Ductile Ire 130.0 0.00
P-8 375.00 6 Ductile Ire 130.0 0.00
P-9 175.00 2 Ductile Ire 130.0 0.00
P-10 375.00 2 Ductile Ire 130.0 0.00
P-11 350.00 6 Ductile Ire 130.0 0.00
P-12 325.00 6 Ductile Ire 130.0 0.00
P-13 300.00 6 Ductile Ire 130.0 0.00
P-14 325.00 2 Ductile In 130.0 0.00
P-15 325.00 6 Ductile lri 130.0 0.00
P-16 325.00 2 Ductile lri 130.0 0.00
P-17 325.00 6 Ductile lri 130.0 0.00
P-18 400.00 8 Ductile In 1.30.0 0.00
P-19 325.00 8 Ductile In 130.0 0.00
Project Title: Davis Park Road Site
Steady State Analysis
Pipe Report
Initial ~urren Discharg Start End
Status Status (gpm) Hydrauli Hydrauli
Grade Grade
(ft) (ft)
Open Open 760.00 893.70 893.70
Open Open 428.73 893.70 893.57
Open Open 351.61 893.57 893.18
Open Open 30.00 893.18 893.18
Open Open 20.00 893.18 867.93
Open Open 331.27 893.70 892.63
Open Open BO.OD 892.63 892.56
Open Open 161.27 892.63 891.67
Open Open 15.85 891.67 890.38
Open Open -17.12 890.38 893.57
Open Open 115.42 891.67 891.19
Open Open -53.33 891.19 891.30
Open Open -103.33 891.30 891.63
Open Open 8.27 891.63 890.91
Open Open -88.75 890.91 891.19
Open Open 7.03 890.91 890.38
Open Open -171.61 891.63 892.56
Open Open -261.61 892.56 893.18
Open Open 30.00 892.56 892.55
c:\haestad\wtrc\davpk2.wcd Piedmont Olsen Hensley
Headlos
(ft)
0.15e-2
0.13
0.39
0.18e-2
25.24
f.07
0.07
0.96
1.29
3.18
0.48
0.11
0.34
0.72
0.27
0.53
0.93
0.62
0.01
Friction
Slope
(ft/1000ft)
1.53
0.53
0.37
0.39e-2
45.89
2.38
0.17
2.55
7.35
8.48
1.37
0.33
1.12
2.21
0.85
1.63
2.86
f.54
0.03
Project Engineer: Doug Mooney
:wa1erCAD vl.5 (0411
12/08/99 11:21:54 AM © Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
I
I
I
I
I
I
I
I
u
I
I
I
I
I
I
I
I
I
I
Node Ii::1eva1io1 Pemanc IPemanc J)emanc
Label (ft) Type (gpm) Pattern
J-1 732.00 Deman 0.00 Fixed
J-2 718.00 Deman 60.00 Fixed
J-3 699.00 Deman 60.00 Fixed
J-4 687.00 Deman 10.00 Fixed
J-5 677.00 Deman 20.00 Fixed
J-6 745.00 Deman 90.00 Fixed
J-7 739.00 Deman 80.00 Fixed
J-8 724.00 Deman 30.00 Fixed
J-9 716.00 Deman 40.00 Fixed
J-10 722_00 Deman 80.00 Fixed
J-11 712.00 Deman 50.00 Fixed
J-12 715.00 Deman 60.00 Fixed
J-13 714.00 Deman 90.00 Fixed
J-14 708.00 Deman 60.00 Fixed
J-15 699.00 Deman 30.00 Fixed
Project Title: Davis Park Road Site
c:\h aestad\wtrc\da vpk2. wed
Calculate•
Demand
(gpm)
0.00
60.00
60.00
10.00
20.00
90.00
80.00
30.00
40.00
80.00
50.00
60.00
90.00
60.00
30.00
Steady State Analysis
Junction Report
Hydrauli ~,essure
Grade (psi)
(ft)
893.70 69.92
893.57 75.92
893_18 83.97
893.18 89.16
867.93 82.57
892.63 63.84
892.56 66.40
891.67 72.51
890.38 75.41
891.19 73.16
891.30 77.53
891.63 76.38
890.91 76.50
892.56 79.81
892.55 83.70
Piedmont Olsen Hensley
12/08/99 11:21:36 AM ©Haestad Methods, Jnc. 37 Brookside Road Waterbury, CT 06708 USA
Project EnQineer: Doug Moonoy
WaterCAD v 1.5 [04 1}
[phone] ' Page 1 of 1
..:.-.-~_· .. :.:,~~.~.-i\~t .. : -:·►-:\~.:/-:'}-~
} ,,• -~ ._..:.::--~·;-..-;~: •'
' ·. ~:: ,;,: ;.• .. -~' ·-\ ·\ ~·:-,:
"'"':.• . ~" . ,:--.. ~ : ~-'
. -_, •" , . -.. -~:,
.-{-,, -·.·:~~-. . .•· ..
~. I...
.,
, ♦ •• .,.. .. .' • ~ , •••
.•. ,; ., ,._,{_•-~--~. ", /-... .~-i~ •. t.'_\~. : ..... ~;:!:> :\\~:.~{:: ~--
/ ,, '. •, ::~.~·\.,'. .. :. t:f·;f~if_;_:::_;.~?.•._,,•,:.;:~' ..
; ,'t -.~, .. -~ .'\. ....... J•-, -l;-.. -,_ .. --._.;..r,"1:,··.:,.· 1" ., •• ,, :~
-,_:·,. . ··p •. ,J ~::,-~:
···.'.·.,· •. -•--~.·,:.... --~· ··',. .. .
, .. -.. , ....... ,.·' .•.. ,•.· ·:~-:.:::-.. ~':-./~->_ .. ·.-.:·-.;_ .. ·;:· . .o:,"-t:.1 .. ' <·-·~-
-• -4 ·•. ·_. • :--i~, :, :i( ... ,.;:,_ •• :.····:·.' -."! ._..,: :;:,_ ... I . ..:.:.•' . ~-._. ~~ .. -·~:;-.:-'.;,J_-:_--··.~---''' :-;.-,: ,·>. ,: .... . ..'.
• < ••• .'
}?Jtr.: ..
', -:-; :,· .. , ·•.(
/i --.--... ·.
,-· . ' ... •'• ,,_ .. ,..,
. ~. t
;. :~ . ·,'
I ,:..• .. ·;-: :~\
\>'_ .. ,.'. ,,,:
:~·---·'/· ;;~.t: .. :i.;
t:!·.···.)."_·f.:_ .. j,•;.·;·_:\_I .. :.'}\ ·;/:~'.~it~\:;·i:~(;.~i>:~::Z://; :.·\:,,f;::otx1Jiif~ijiji(::~.:-> .. ':: .... · ..... ·: ., .. ·i ,·/i1::;
:::; .. ::~, ,·;\ '::'':5:· :''.:}?:::\... .:·J, __ · .·i.•:: :~}}::~'};:{,/ \\: ·>'tit,-·{:.;:: ;\:/}?'i/\~\>:::\. ~. . .,. '; ·., ::,'r:~ :.i
j){\:·. •". · ;·:·: · ·: \': ·1 · · • '.,;~ :};~.: ·: /c·· ; ),:., t:::.\ /'' ·= ~;. • ~: •1. .. i'.·:f; .· .. :.-•. ~ c'. l~t·
{·• ' . .."'. \ :"-_: •. '.;,·::~ .. ·~ .. ··.•·.;\t.·;·~:.•;:._:'·.-' .. ·,·;.f' .. ··_,;:•:·.•;·.:· ·:·,_::,:_.•:_•:.'· .... ·.-~::~·.:j···.·'.·•:,:·'·'.;-{ .. ,_':'.,•.'.-.,:''::·~.-:.' .. : .. ·, .. ,:"'. ::: .. ·."-~ .• ·.·_,,_:_~·,.• •: ... ::.,·c_,:~.·,,.•.:'::-.·•• .. •.••',':: .. _·,··•.· • ,:.I·-;_ .-1 l •• • ::/ •.i i_.r:, .. f ... ..' : :..., r·•· . . . . ·.. . . . . . .·.· . C •··... .... . . !(·J{}?,::t,)'.~~
,•, _ _,:. -~~ : .. ,·-~ ;-.;--. .
, •• '••,1 .. 1~ ,'\" .. ·:.--. ,,_, .:, .-.~~,• :: : •·:~~•.::.·,·! ... ,--.. _.,,' --~~·• .. •• ..... ' . ....,
~--:.,-' ·1 \ __ ;\~-~~-~-•-; ·-0~·.:·:·.'· ~-~· :,:_,,,.;·,_ .... :. •. --~~:·>.<~\{ ·-:~-' ,:,:: ,, :.,~_/t~//~!C::,:{'.\~?:,·· <-.. : ·_: _.,_ · ,. ~ -
·,.
. . . . ••.; '~
.... i"•' ·'\,.-'.:r:,:'·,"·':, .. ' ~
;,: . .-. ,;..); :,.,r_ ·,•' 't·-:·•; ..... ,.. ,.. .,-- -~. --; --~ ,. ,_,· ,-<-,; '.·
-:-: .;1/•.·.: ... · __ ~.'-:,~·.-.·"'.·.·,,:··:,:.:•=.::,'..,:.., \i,~ ·\.· ••t-·'C.," '.~ -:, :·'
1
• ;Jo'_-:z --,. ' .,.~-,,!,~:,rt:·~·_?: .. _·:::> .. --_ ... _._";,•:~~·
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
H
D
D
APP~:NDIX C
CARBON FILTRATION ASSEMBLY
NOR/K:\WP\20064\048\RAR001. DOC
Remedial Action Rcprn1
Davis Park Road TCE Sitt:
Date: Fchruary 2001
IX:N: RFW048-2A-AIIMX
1-
1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
l
NOTES
1. ALL PIPING 3/4" SCH. 80 PVC
2. VIEW EXPANDED FOR CLARITY.
10 GPM CARBON CARTRIDGE FILTRATION UNIT FOR SINGLE HOUSEHOLD
7
!
_J