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Quarterly_Re -ort - First Quarter 2002 - <br /> 1 - ---- LOCAL FOOD STORE - <br /> _1 2650 Monte Diablo Avenue, Stockton, California <br /> I ' - 1.0. INTRODUCTION <br /> _' - "— At the request of Mr Liaqat Khan of Local Food Store,Advanced GeoEnvironmental, Inc (AGE) - <br /> - _ -has prepared this quarterly report for Local Food Store, located at 2650 Monte Diablo Avenue, <br /> Stockton, California (the site) The scope of work included monitoring and sampling four ground <br /> ' water monitoring-wells and preparation of this report The location of the site with respect to its <br /> surroundings is illustrated in Figure 1- On-Site structures,boring and monitoring well locations are <br /> illustrated in Figure 2 <br /> Y <br /> This report has prepared in accordance with Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) guidelines-for subsurface investigations of underground storage tank°(UST) sites <br /> ' - General background mformahon and data were presented in the AGE-prepared Preliminary <br /> Evaluation and Investigation Report, dated 04 August 2000 Previous ground water monitoring <br /> results are included in the tables of this report - <br /> - 2.0. PROCEDURES` <br /> -The field activities were performed in accordance with the San Joaquin County Environmental <br /> Health Department (EHD)-approved Preliminary Site Assessment Work Plan, prepared by AGE, <br /> --dated 29 November_1999 <br /> i2 1 WELL MONITORING.-AND EVACUATION <br /> On 13 March 2002, a Solinst water level nieter wag-used to measure the depth to ground water in all <br /> ' four monitoring wells relative to the tops of the well casings After water levels were measured,each <br /> well was purged utilizing a disposable bailer or 2-stage pump Six gallons (a minimum of three <br /> _ - casing-water volumes)of-water were removed from wells MW-1,MW-3 and MW-4 and twenty-four <br /> -, gallons of water were removed from well MW-2 <br /> Temperature, pH and conductivity of the purged water were measured at two-gallon intervals for - <br /> '' -_—MW-1,MW-3 and MW4 and at five-gallon intervals for MW-2 Temperature, H an <br /> p ,p d conductivity _ <br /> - of the purged water was measured using an Oakton water analyzer(Appendix A) Purged water was <br /> T _- stored on=site in 55-gallon, DOT-approved drums - - <br />