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1 <br /> Quarterly Report - Fourth Quarter 2000 <br /> RIPON FARM SERVICE <br />' 22871 South Highway 99, Ripon, Califorma <br />' 10. INTRODUCTION AND SCOPE OF WORK <br /> At the request of Mi Allan Fetters, Advanced Geo Environmental, Inc (AGE) has prepai ed this <br />' report for gi ound water monitoring and sampling activities conducted at 22871 South Highway 99, <br /> Ripon, California (the site) <br /> This report documents the sampling activities performed at the site on 07 November 2000 The <br /> objective of the work was to monitor ground water conditions and concentrations of dissolved <br /> ' petroleum hydrocarbons and selected fuel additives in ground water at the site The location of the <br /> site and its surroundings are illustrated in Figure 1 Structures and monitoring well locations <br /> associated with the site are depicted in Figure 2 <br /> ' Monitoring and sampling activities were conducted in accordance with both the San Joaquin County <br /> Public Health Services-Environmental Health Division(PHS-EHD)and the Central Valley Regional <br /> ' Water Quality Control Board(CVRWQCB)guidelines for the investigation and sampling of ground <br /> water wells at underground storage tank(UST) sites <br /> Background information, including details of previous site assessment work, was presented in <br /> Corrective Action Plan, dated 01 June 1999 and prepared by AGE Previous quarterly monitoi ing <br /> data, dating as far back as May 1994, is summaiized in Tables 1 thiough 3 in this report <br /> 2.0 PROCEDURES <br /> ' 2 1 MONITORING WELL PURGE PROCEDURES <br /> ' On 07 November 2000, a Solinst water level meter was used to measui e the depth to ground water <br /> in wells MW-1 through MW-5,VW-IA/B and VW-2AIB Wells VW-1A and VW-2A are soil vapor <br /> ' extraction wells with screened intervals between 5 and 20 feet below surface grade (bsg), VW-IB <br /> and VW-2B are an spargmg wells with screened intervals between 30 and 35 feet bsg The depths <br /> to gi ound water are summarized in Table 1 <br /> ' After ground water depth measurements were recorded,a minimum of three well-volumes of ground <br /> water were pui ged from wells MW-1 through MW-5,VW-I B,VW I-2A and VW-2B All wells were <br /> ' purged using a pre-cleaned two-stage submersible pump, excluding well VW-2A which was purged <br /> using a disposable bailer Well VW-1A was dry Temperature,pH, and conductivity were measured <br /> at regular intervals using a Hydac water analyzer Purged water was stored on-site in 55-gallon <br /> ' drums The field data sheets are included in Appendix A <br /> ' Advanced GeoEnvlrohmenwl,111u <br /> 1 <br />