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ARCHIVED REPORTS_XR0007111
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PR0544811
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ARCHIVED REPORTS_XR0007111
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Entry Properties
Last modified
11/20/2024 9:21:18 AM
Creation date
9/5/2019 1:34:13 PM
Metadata
Fields
Template:
EHD - Public
ProgramCode
3500 - Local Oversight Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0007111
RECORD_ID
PR0544811
PE
3528
FACILITY_ID
FA0000091
FACILITY_NAME
Colonial Energy CE 40138 (DBA Power Mart)
STREET_NUMBER
14000
Direction
E
STREET_NAME
STATE ROUTE 88
City
LOCKEFORD
Zip
95237
CURRENT_STATUS
02
SITE_LOCATION
14000 E HWY 88
P_LOCATION
99
P_DISTRICT
004
QC Status
Approved
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EHD - Public
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r <br /> January 27, 1999 <br /> SECOR <br /> M <br /> /ltt('117(111��11C1�/llCol/)C)1G1lCCI � <br /> Ms Anastasia Duarte-Wilkinson ' <br /> Time Oil Company <br /> 2737 West Commodore Way <br /> Seattle, WA 98199 <br /> SUBJECT. Quarterly Monitoring Report, October- December 1998 <br /> Jackpot Food Mart <br /> 14000 East Highway 88 <br /> Lockeford, California <br /> Ms Duarte-Wilkinson ` <br /> This report presents the results of quarterly groundwater monitoring and sampling conducted at the Jackpot r` <br /> Food Mart at 14000 East Highway, Lockeford, California (the site, see Figure 1) <br /> GROUNDWATER MONITORING AND SAMPLING <br /> t} z <br /> ss <br /> Ten groundwater monitor wells were sampled on October 26, 1998 at the site Monitor wells MW-1 <br /> through MW-4 were installed as part of an environmental investigation conducted in December 1994 In <br /> July 1996, morutor wells MW--5 through MW-10 were installed as part of an additional environmental site <br /> assessment Prior to purging each groundwater monitor well, a water sample was taken and subjective r <br /> analyses performed The subjective analyses consisted of checking for floating product or a hydrocarbon <br /> sheen by lowering a clean teflon bailer down the well and collecting a sample at the groundwater-air ' <br /> interface Wells not containing floating product were purged of approximately 2 to 4 casing volumes ofr , <br /> water or until groundwater parameters of pH, temperature, and conductivity stabilized as measured by 1 <br /> portable meters calibrated to a standard buffer and conductivity standard If the well was slow to recover <br /> or purged d the water level in the monitor well was allowed to recover to at least 80 percent of its static ' F <br /> A g dry, <br /> level before sampling The groundwater samples were then collected by lowering a clean disposable bailer i <br /> into the well and collecting a representative sample The groundwater samples were slowly transferred to <br /> laboratory-cleaned sample containers, sealed with teflon caps, labelled with the sample number, sample time ryr�Yt <br /> and date, and immediately placed on ice in an insulated container Each sample was logged onto a chain-of- <br /> custody record for subsequent delivery to Excelchem Environmental Labs located in Roseville, California <br /> Groundwater samples were analyzed for TPHg, BTEX, and MTBE using modified EPA Method 8015, and <br /> 1 z"t <br /> EPA Method 602 respectively Sample DLP was submitted as afield duplicate for monitor well MW-1 ,w ; <br /> 'FAS <br /> Groundwater Elevation Data '} <br /> Depth to groundwater was obtained from the existing groundwater monitor wells at the site using a water "`f <br /> level indicator graduated to 0 01 foot The depth to groundwater measurement was converted to a <br /> groundwater elevation for each well and used to construct a potentiometric surface map (Figure 2), and '= <br /> calculate the local groundwater flow direction and hydraulic gradient Groundwater at the site was <br /> measured at depths between 64 14 to 76 39 feet bgs The groundwater potentiometric surface elevation <br /> averaged approximately 69 99 feet below ground surface (bgs) during this monitoring event The 'Y� <br /> • groundwater potentiometric surface elevation has decreased approximately 0 18 feet since the last sampling <br /> event in August 1998 The groundwater flow direction during this reporting period is toward the south F� <br /> with a hydraulic gradient of approximately 0 03 ft /ft A summary of data regarding groundwater levelsr <br /> D Mme 0181 OCKFORDgm 498 SECOK , 4 <br /> 7GO -DO)011L0004 January 27 1999 <br /> 9912 Rllsinee5 Park Dnve Saute 700 Sacramento CA 95827 (916) 3611-1,480(916) X64-1889 1/i 1 wu a wcorcom � � f <br />
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