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• A S S O C I A T E S I N C <br /> sampled well A dedicated disposable bailer was used to collect each water sample Field <br /> parameters and purged volumes are shown on well purge logs included in Attachment 1 <br /> LABORATORY ANALYSIS <br /> Groundwater samples from the monitoring wells were placed on ice and transported under chain- <br /> of-custody protocol to Sequoia Analytical laboratory Groundwater samples from wells MWI, <br /> MW4, MW6 and MW7 were analyzed for TPHg and total petroleum hydrocarbons as diesel <br /> (TPHd) by EPA method 8015 modified, BTEX by EPA method 8020, methyl tertiary butyl <br /> ether (MTBE), 1,2-dibromoethane (EDB), 1,2-dichloroethane (1,2-DCA), and additional <br /> oxygenate fuel additives including tertiary amyl ether (TAME), di-isopropyl ether (DIPE), <br /> ethyl tertiary butyl ether (ETBE), and tertiary butyl alcohol (TBA) by EPA method 8260B <br /> ANALYTICAL RESULTS <br /> Dissolved petroleum hydrocarbon constituents were detected in wells MWI, MW2, MW3, <br /> MW4, and MW6 However, aromatic hydrocarbons were detected only in samples from wells <br /> MWI, MW2, and MW3 Only benzene exceeded established the California Primary Maximum <br /> Contaminant Level (MCL) for drinking water in MWI and MW2 with concentrations of 380 ppb <br /> and 230 ppb, respectively <br /> No oxygenate fuel additives were detected in any of the samples above laboratory method <br /> detection limits <br /> Analytical results for groundwater are summarized in Table 2 Laboratory data sheets and chain <br /> of custody documentation are included as Attachment 2 <br /> FREE PRODUCT REMOVAL <br /> Free product was been monitored and removed from MW2 on a monthly basis from the time a <br /> passive skimmer was installed in this well on June 27, 1997 until December 1999 Due to the <br /> minimal amount of free product being recovered (<0 5 liters per quarter) in comparison to the <br /> relatively large capacity of the skimmer's recovery reservoir (>2 liters), the free product skimmer <br /> has been monitored only on a periodic basis and at minimum once per quarter, beginning in <br /> March 2000 During the Third quarter 2000, a total of less than 0 1 liters of product was <br /> removed <br /> To date a total of approximately 17 04 liters of product have been removed from the skimmer <br /> placed in MW2 A summary of product volume removed and previous product analytical data is <br /> presented in Table 3 Field notes associated with free product removal during the reporting <br /> period are included in Attachment 1 <br /> 92054 00061QUARTLYI3QR-2000 DOC 3 <br />