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ASSOCIATES I NC <br /> l <br /> SELF-MONITORING RESULTS <br /> From the date of its startup, December 20, 2002, through April 26, 2004, the groundwater <br /> treatment system had an average flowrate of 0 53 gallons per minute (gpm) and 763 gallons per <br /> day (gpd) and a total discharge of 280,452 gallons During the reporting period for April 2004, <br /> the groundwater treatment system had an average flowrate of 0 29 gpm and 417 gpd and a <br /> discharge of 12,872 gallons The LEL did not exceed 10% during the April 2004 monitoring <br /> period <br /> The final treated groundwater sample (Effluent) collected on April 26, 2004, contained no <br /> detectable concentrations of total petroleum hydrocarbons, TPHg, BTEX, MTBE, ETBE, TBA, <br /> TAME, DIPE, 1,2-DCA, or EDB The final treated groundwater sample (Effluent) collected on <br /> April 26, 2004 indicate that pH was within the required range Results of the monthly self- <br /> monitoring program are summarized in Table 1 and analytical data is attached <br /> If you require any additional information, please contact our office at (209) 579-2221 <br /> Respectfully submitted, <br /> • ATC Associates Inc <br /> �M <br /> Nathan Christman <br /> Staff Geologist <br /> v L�& --r <br /> Drew Van Allen <br /> Senior Project Manager. <br /> AN k INA" <br /> anne Hornsey, P ETZ <br /> _� <br /> CA Registered Civil Engineer No 47410 <br /> cc Mr and Mrs Raymond FarmerIV, Z xi <br /> t 146 <br /> Mr Jeff Wong, SJCEHD ' <br /> 4P <br /> s 162596Vcportslwaterdischarge104_04 doe 2 <br />