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v A <br /> ASSOC IATES INC <br /> disposable bailer was used to collect each water sample Field parameters and purged volumes <br /> are shown on well purge logs included in Attachment I <br /> LABORATORY ANALYSIS <br /> Groundwater samples from the monitoring wells were placed on ice and transported under chain- <br /> of-custody protocol to State-certified Argon Laboratories Inc (ELAP Cert No 2358) in <br /> Ceres, California for analysis Groundwater samples from wells MW-1, MW-2, and MW-3 <br /> were analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) by EPA methods 8015M/8020, and oxygenate fuel additives, <br /> including MTBE, by EPA method 8260 <br /> ANALYTICAL RESULTS <br /> None of the groundwater samples analyzed contained BTEX or and oxygenate fuel additives <br /> above the laboratory method detection limits Only TPI-Ig was detected in monitoring wells <br /> MW-1 and MW-3 at concentrations of 150 micrograms/liter (ug/1) and 130 ug/l, respectively <br /> Well MW-2 contained none of the target constituents above laboratory method detection limits <br /> i� Analytical results for groundwater are summarized in Table 2 Laboratory data sheets and chain <br /> of custody documentation are included as Attachment 2 <br /> OTHER SITE ACTIVITIES <br /> During the March 29, 2000 monitoring and sampling activities Mike Infura of San Joaquin <br /> County Public Health Services, Environmental Health Division observed the surface seal of well <br /> MW-3 had been damaged and was in need of repair Mr Infurna subsequently issued an <br /> Abatement Notice requesting the well be repaired <br /> On April 7, 2000 ATC revisited the site and repaired the damaged well The damaged utility box <br /> was removed with the aid of a jackhammer A new utility box was subsequently installed over <br /> the wellhead and secured in place with concrete A new expandable locking plug was also <br /> installed on the well casing to prevent the infiltration of surface water down into the well <br /> Also, the obstruction in MW-3 at 7 5 feet below the top of the well casing, as noted earlier, was <br /> removed from the well by using hand tools and a centrifugal pump Pieces of what appeared to <br /> be plastic weather stripping, in addition to rocks and pebbles, were removed from the well <br /> 925054 000211-2000 qm 2 <br />