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C\TATc <br /> A S S O C I A T E $ I N C <br /> r <br /> SELF-MONITORING RESULTS <br /> From the date of its startup, December 20, 2002, through May 21, 2003, the groundwater <br /> treatment system had an average flowrate of 0 72 gallons per minute (gpm) and 1,040 gallons per <br /> day (gpd) and a total discharge of 150,259 gallons During the reporting period for June 2003, <br /> the groundwater treatment system had an average flowrate of 0 71 gpm and 1,021 gpd and a total <br /> discharge of 25,577 gallons The LEL did not exceed 10% during the June 2003 monitoring <br /> period The treatment system was not operational for a period of approximately five days due to <br /> mechanical difficulties with the thermal oxidizer unit <br /> Final treated groundwater samples (Effluent) collected on June 9 and 25, 2003, contained no <br /> detectable concentrations of total petroleum hydrocarbons, TPHg, BTEX, MTBE, ETBE, TBA, <br /> TAME, DIPS, 1,2-DCA, or EDB Final treated groundwater samples (Effluent) collected on <br /> June 9 and 25, 2003 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 /> ADDITIONAL ACTIVITIES <br /> Due to scheduling conflicts, ATC was unable to coordinate the calibration of the flow meter in <br /> June 2003 The flow meter will be calibrated in July 2003 Calibration of the flow meter will be <br /> performed by Cooper Controls and Electrical Services <br /> If you require any additional information, please contact our office at (209) 579-2221 <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> } <br /> Drew Van Allen ,,�t�.:�n <br /> Senior Project Manager le� 4IDA� , IE <br /> "'' r <br /> .;. <br /> A <br /> �Ilomy, P E s = F ko <br /> CA Registered Civil Engineer No 47410 <br /> cc Mr and Mrs Raymond Farmer <br /> Mr Jeff Wong, SCJEHD <br /> S 162596Ireportslwaterdischarge106_03 doe 2 <br />