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QuaReport rterly RStronort Third Quarter 2000 ; <br /> �• . . - . : g Proparty • . - • , <br /> • <br />' 5.157-,West Business•L•oop 245, Tracy; California . + <br /> '1.0.' ", INTRODUCTION <br /> At the request of Ms: Ruth Stron ; '. nced'Geo'Environmental, Inc. (AGE) has prepared this <br /> quarterly report for the property located at 5157 West Business Loop,205;Tracy,California.The,site <br /> and the surrounding area are illustrated in Figure T. Structures and monitoring well locations are <br /> illustrated on Figure'2:- <br /> Field work was performed in accordance with giidelines developed by the San Joaquin County, <br /> Public Health Services -Environmental Health Division�(PHS-EHD) and Central Valley,Regional' <br /> Water Quality Control Board(CVRWQCB)for the investigation of underground storage tank(UST) <br /> .sites. , .. <br /> Background•lnforIation is summarized in the AGE document titled Additional Site Assessment <br /> Work Plan'Addendum, dated 01 July 2000. Quarterly monitoring data from July 199$ to the present <br /> is summarized in Tables 1 and 2'ih this report., „ <br /> _. 2.0. QUARTERLY MONT.TORING AND SAMPLING PROCEDURES <br /> - 2.'1.: « GROUND WATER DEPTH GAUGING AND PURGING PROCEDURES <br /> Ground water sampling of monitoring Wells MW 1 through MW6 occurred on 28 August 2000. For . <br /> the sampling event,a.Solinst water level meter-was used to measure the'depth to.ground water in the ; <br /> I• ` six wells relative to .the tops of the well•casings. The;ground water elevations and gradient were <br /> determined from these data(Table 1). <br /> After recordinwaterjevel measureinents,;a submersible pump was used to purge each monitoring <br /> .. �• g .. h <br /> well of standing water:"-Approximately 5 to 9 gallons�of water.( minimum of 3 water volumes per <br /> well)"were reinbved from each well.Ground water,temperature,pH and'conductivityvere measured <br /> ' • atre uiar intervals dixrrg pur i , ia H dac water analyzer. Field sheets'and data are includednusr <br /> in Appendix A.. Purged Water Was storedon-site in•labe"kd,_55•-gallon D.OT-approved drums. <br /> 'COLLECTION OF GROUND. WATER.SAMPLES, <br />'. "Water sam les'wcr'e,collected from each ur ed well usin 'new disposable plastic bailers.-Each,. <br /> p P g g , <br /> water sample was transferred into one T-liter amber.bottles'and three'40-ml,VOA vials containing <br /> 0.5 ml 18%hydracliloric acid as a sample preservative.'After collection, tlie•sample5 were properly <br /> :. labeled, placed in a,chilled container and transported'under chain-of;'custody,-to'McCampbell <br /> Advanced.GeoEnviroumentaI4Inc.. ,, <br />