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Quarters ort - March 1999 <br /> • Y Report <br /> Former Curtiss Pontiac Buick <br /> 2450 Toste Road, Tracy, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Joe Taste, Advanced GeoEnvironmental, Inc (AGE) has prepared this <br /> Quarterly Report for 2450 Toste Road, Tracy, California(the site) The scope of work included the <br /> sampling of five ground water monitoring wells The site setting is illustrated in Figure 1 A plan <br /> view of the site is illustrated in Figure 2. <br /> A summary of previous investigation at the site is included in the Preliminary Investigation and <br /> Evaluation Report(PIER),prepared by AGE, dated 15 August 1997 and Quarterly Report, prepared <br /> by AGE, dated 18 September 1997 Ground water monitoring data collected from monitoring well <br /> MW-3,which is part of the underground storage tank(UST)release investigation at 2420 Grant Line <br /> I Road, is included in this investigation to delineate the down gradient extent of the dissolved <br /> hydrocarbon plume and to determine ground water flow direction and gradient <br /> This report is prepared in accordance with Central Valley Regional Water Quality Control Board and <br /> San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) <br /> guidelines <br /> 2.0. PROCEDURES <br /> The ground water monitoring activities were conducted in accordance with Central Valley Regional <br /> I Water Quality Control Board and San Joaquin County Public Health Services - Environmental <br /> Health Division (PHS-EHD) guidelines <br /> 21 GROUND WATER DEPTH MEASUREMENT AND PURGING <br /> On 25 March 1999, a Solinst water level meter was used to measure the depth to ground water in <br /> each well relative to the tops of the well casings After ground water depth measurements were <br /> collected,monitoring wells MW-IA and MW-2A were purged using a two-stage submersible pump, <br /> Iwhile wells MW-1 B,MW-2B,MW-3,MW-5 and MW-6 were purged with pre-cleaned PVC bailers <br /> Three gallons of water (a minimum of 3 well volumes per well) were evacuated from MW-6, four <br /> gallons of water were removed from wells MW-IB, MW-2B, MW-3 and MW-5, and ten gallons of <br /> water were purged from MW-1A and MW-2A <br /> Temperature,pH and conductivity were measured at 1-gallon intervals in wells MW-IB, MW-2B, <br /> MW-3, MW-5 and MW-6, and at 2-gallon intervals in wells MW-IA and MW-2A The field data <br /> were measured with an ICM model 52200 water analyzer Logs of the field data are included in <br /> IAppendix A Purged water was stored on-site in labeled 55-gallon drums <br /> Advanced GeoEnvironmental Inc <br />