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. CvvATC <br /> A S S 0 C 1 A T E S I N C' <br /> SELF-MONITORING RESULTS <br /> From the date of its startup, December 20, 2002, through July 29, 2003, the groundwater <br /> treatment system had an average flowrate of 0 69gallons per minute (gpm) and 988 gallons per <br /> day (gpd) and a total discharge of 164,170 gallons During the reporting period for July 2003, <br /> the groundwater treatment system had an average flowrate of 0 59 gpm and 846 gpd and a total <br /> discharge of 13,911 gallons The LEL did not exceed 10% during the July 2003 monitoring <br /> period The treatment system was not operational for a period of approximately nine days due to <br /> mechanical difficulties with the thermal oxidizer unit <br /> Final treated groundwater samples (Effluent) collected on July 29, 2003, contained no detectable <br /> • concentrations of total petroleum hydrocarbons, TPHg, BTEX, MTBE, ETBE, TBA, TAME, <br /> DIPE, 1,2-DCA, or EDB Final treated groundwater samples (Effluent) collected on July 29, <br /> 2003 indicate that pH was within the required range Results of the monthly self-monitoring <br /> program are summarized in Table 1 and analytical data is attached <br /> ADDITIONAL ACTIVITIES <br /> On July 11, 2003, Mr Eric Cooper of Cooper Controls and Electrical Services calibrated the <br /> discharge water flow meter at the site A copy of the calibration report 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 /> Drew Van Allen <br /> Senior Project Manager <br /> ARE <br /> ?J =7eHomsey, P <br /> y <br /> CA Registered Civil Engineer No 47410 <br /> ell <br /> cc Mr and Mrs Raymond Farmer <br /> Mr Jeff Wong, SCJEHD " MIL �. <br /> s 1625961reportslwaterdischarge106_03 doc 2 <br />