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Quarterly, ort - Second Quarter 2000 Former MEL BOKIDES PETROLEUM Manteca ' 983 Moffat Boulevard, Manteca, California 1.0. INTRODUCTION In accordance with the request of Mr. Nick Bokides of Mel Bokides Petroleum, Advanced GeoEnvironmental, Inc., (AGE) has prepared this quarterly report for the site located at 983 Moffat Boulevard, Manteca, California(si.te). ' The scope of work was to monitor and sample ground water at the site to assess the lateral extent of petroleum hydrocarbon impact to the ground water. The location of the site is illustrated on Figure 1. A,plan of the site is illustrated on Figure 2. Background information and results of prior investigations at the site were included in the ' Preliminary Investigation and Evaluation Report(PIER) dated 09 March 1999 and Quarterly Report dated 07 March 2000, prepared by AGE. All.field work procedures and reporting requirements are in accordance with guidelines established by the Central Valley Regional Water Quality Control Board (CVRWQCB) and by the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) for subsurface '•� investigation of underground storage tank (UST) system sites. 2.0. PROCEDURES 1 2.1. GROUNDWATER DEPTH MEASUREMENT AND PURGING ' On 01 May 2000 a Solinst water level meter was used to measure the depth t y p o ground water In each well relative to the top of the well casing. After ground water depth measurements were collected, ' monitoring wells were purged using a two-stage submersible pump. Nine gallons of water{a minimum of 3 well-volumes)was evacuated from wells MW-1, MW-3 and ' MW-4. Only six gallons of water(3 well-volumes) were evacuated from well MW-2. Temperature, pH and conductivity of the purged water were measured at regular purge-volume intervals in all ' wells. These field data were measured with an ICM model 52200 water analyzer. Logs of the field data are included in Appendix A. Purged water was stored on-site in labeled 55=gallon drums. 2.2. COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES ' Ground water samples were collected from each well using a new disposable plastic bailer. Each water sample was transferred into three 40-m1 EPA-approved VOA vials containing 0.5 ml 1 S%HCl as a sample preservative and into one 1-liter amber bottle without preservative. After collection, the Advanced Geo Environmental,Inc.