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12p-' 3y 5 1 <br /> • s• - '., I ,. c,4 r S E' '� <br /> s 1. 1, �. <br /> A Y�MART . <br /> I 'FA T.AND E S ,". <br /> 244.,West.Harding Way, Stockton, Cahforliia , <br /> 5 , 7 <br /> 1.0. "INTRODUCTION', <br /> t <br /> Nt the request:of Mr.Mike Ali,Advanced GeoEnvironmental;Inc: (AGE)has preparedlthe enclosed <br /> quarterly report for'the property located at 244 West Harding Way;,Stockton, California:The 'scope <br /> of work included gground-water'monitoiin and sam ling,laboratory sample analysis,and. preparation. <br /> of"this report.Site background information is included in Appendix�A.-The site and surrounding area., = <br /> are illustrated .on Figure 1. On-site structures,, soil borings, and monitoring well bcations are,, ; <br /> illustrated_on-Figure.2. w. , <br /> Z-& PROCEDURES <br /> Field procedures were performed in accordance with Central Valley Regional Water Quality Control <br /> Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST)sites and <br /> San Joaquin County Environmental Health Department(EJ-1p)guidelines for the sampling of ground <br /> '.` water monitoring wells. <br /> 2,1. WELL MONITORING AND EVACUATION <br /> On 03 February 2005, the, depth to ground water in monitoring wells MW-1 through MW-3 was <br /> -foot utilizin <br /> measured from the top of each Well casing to•the nearest 0.01g a Solinst water level <br /> meter: Ground water elevation in each well was calculated.by subtracting the measured depth to <br /> ground water from the'surveyed casing elevation (Table 1): <br /> y,I After water levels were measured,eight gallons of water(a minimum of three casing water volumes <br /> 'per well) were purged'frorri the wells using dedicated, disposable plastidbailers. Ground water ,, <br /> a <br /> :tem erture H and conductivit were measured at regular intervals during purging using P .. � p Y , g gP g .gun„ . g an• <br /> ., Oakton water analyzer. Field sheets and.data are included in Appendix'B, Purged water was`gtored <br /> 'on-site in properly labeled,Department of Transportation(DOT)-approV,ed 55-gallon drums,pending <br /> ,proper disposal. <br /> 2.2. COLLECTION OF GROUND WATER SAMPLES. <br /> Groundwater samples were collected from the monitoring wells using disposable plastic, bailers; - <br /> these bailers:were disposed of after one use, thereby minimizing cross-contamination_ due to <br /> sarnpling devices. Each-ground water sample was collected into three 40-milliliter•(ml) volatile • . <br /> III organic analysis (VOA) vials containing 0.5. ml 18% hydrochloric acid solution as a'sample <br /> preservative. After'collection, the. samples were labeled ,and placed in a chilled container for <br />`'' Advairced GeoEnvironmental,In_c. .: <br />