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RECF <br /> Quarterly'Report �- Fourth Quarter 2000, • 001 <br /> ' BOB'S MUFFLER SHOP3 Z <br /> 466 Moffat Boulevard, Manteca,•CaliforniaENVIRMEiv i HEALTH <br /> PERMITISGRVICES <br /> 1.0. INTRODUCTION <br /> In accordance with the request of Mr. Tom Barbour . of Bob's Muffler Shop, Advanced <br /> GeoEnvironmenial, Inc. (AGE) has prepared this quarterly report for the property located at 466 <br /> Moffat Boulevard,- Manteca, California. The scope 'of work included quarterly ground water <br /> monitoring and preparation of this report. The location of the site and the immediately surrounding <br /> .area are illustrated on Figure 1; structures, former UST locations, and soil boring and monitoring - <br /> ' well locations are illustrated on Figure 2. Background information is summarized in the Preliminary L <br /> Site Assessment Work Plan dated 30 November 1998 and Preliminary Investigation and Evaluation <br /> Report dated 10 August 1999, both prepared by AGE. <br /> 2.0. PROCEDURES <br /> Quarterly ground water monitoring was,performed on monitoring wells MW-I through MW-5 on <br /> 07 December 2000. Field work was performed in accordance with the San Joaquin County Public <br /> Health Services - Environmental Health Division(PHS—EHD) and Central Valley Regional Water <br /> Quality Control Board(CVRWQCB)guidelines for sampling ground water monitoring wells and. <br /> investigation of underground`storage tank(UST) sites. <br /> 2.1. MONITORING WELL PURGE PROCEDURES <br /> On 07 December 2000, a Solinst water level meter was used to-measure the depth to ground water <br /> in the five wells relative to the tops of the well casings. Ground water elevations, flow direction and <br /> gradient were determined from this data (Table 1). <br /> 1 After recording water level measurements, a stainless steel bailer was used to purge each monitoring <br /> well of standing water. Approximately 9 gallons of water were removed from each well <br /> (approximately 3 well,casing water volumes). Ground water temperature, pH and conductivity were <br /> measured at 3-gallon intervals during the purge process using a Hydac water analyzer. Field data <br /> 1 sheets are included in Appendix A. Purged water was stored on site in labeled 55-gallon <br /> DOT-approved drums. <br /> 2.2. COLLECTION OF GROUND WATER SAMPLES <br /> ' . Water samples were collected from each'purged well with a stainless steel bailer. Each water sample <br /> was transferred into laboratory-supplied 40-ml'VOA vials containing 0.5 ml 18% hydrochloric acid <br /> Advanced GeoEnvironmen#al,Inc. <br /> 1 <br />