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i <br /> IQuarterly Report - Third Quarter <br /> • Former MEL BOKIDES PETROLEUM - Linden <br /> 8203 East Highway 26, Stockton, California <br /> 1.0. INTRODUCTION <br /> At the request of Mr Nick Bokides of Mel Bokides Petroleum(MBP),Advanced GeoEnvironmental, <br /> Inc (AGE) has prepared this quarterly report for the property located at 8203 East Highway 26, <br /> Stockton, California (site) The scope of work included quarterly ground water monitoring and <br /> preparation of this report, which was prepared in accordance with guidelines issued by the Central <br /> Valley Regional Water Quality Control Board (CVRWQCB) for subsurface investigations of the <br /> former underground storage tank (UST) systems The site location and site plan are illustrated on <br /> Figures 1 and 2, respectively, the site background information is summarized in Appendix A <br /> 2.0 GROUND WATER MONITORING PROCEDURES <br /> Field work was performed in accordance with procedures outlined in Initial Work Plan for <br /> Preliminary Site Assessment,prepared by AGE,dated 30 November 2000,and approved by the San <br /> Joaquin County Environmental Health Department (EHD)by letter dated 13 December 2000 <br /> 2 1 MONITORING WELL EVACUATION AND MONITORING <br /> On 12 July 2002,the water level in each monitoring well was measured relative to the top of the well <br /> casing using a Solinst water level meter After water levels were measured, a dedicated, disposable <br /> plastic bailer was used to purge each well Five gallons(a minimum of three well volumes)of water <br /> were removed from the wells Temperature,pH and conductivity of the purged water were measured <br /> at two-gallon intervals using an Oakton water analyzer during purging, and the values had generally <br /> stabilized by the end of the purging process (Appendix B) Purged water was stored on-site in <br /> 55-gallon, Department of Transportation-approved drums <br /> 2 2 COLLECTION OF GROUND WATER SAMPLES <br /> Prior to collection of ground water samples,the depth to ground water was measured in each purged <br /> well to ensure that a minimum of 80% of the well volume had recharged A water sample was <br /> collected from each well using a new disposable plastic bailer Each water sample was transferred <br /> into three chilled 40-m1 volatile organic analysis (VOA) vials containing 0 5 ml hydrochloric acid <br /> (18%) as a sample preservative and one 1-liter amber bottle After collection, the samples were <br /> labeled and placed in a chilled container for transportation under chain-of-custody to McCampbell <br /> IAnalytical Inc (MAI),a California Department of Health Services-certified analytical laboratory,in <br /> •} Pacheco, California Each sample was analyzed for <br />' Advanced Geo Environmental,Inc <br /> I <br />