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(VYATC <br /> A S S O C I A T E S I N C <br /> SELF-MONITORING RESULTS <br /> From the date of its startup, December 20, 2002, through November 5, 2004, the groundwater <br /> treatment system had an average flowrate of 0 51 gallons per minute (gpm) and 741 gpd and a <br /> total discharge of 338,662 gallons During the reporting period for October 2004, the <br /> groundwater treatment system had an average flowrate of 0 33 gpm and 482 gpd and a discharge <br /> of 1,567 gallons The LEL did not exceed 10% during the October 2004 monitoring period <br /> The system has been off-line since early October 2004 as the liquid ring blower is damaged and <br /> 2s currently being repaired ATC will notify the City of Stockton when the system is restarted <br /> ATC was able to manually operate the remediation system for purposes of collecting an effluent <br /> sample <br /> The final treated groundwater sample (Effluent) collected on November 5, 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 /> November 5, 2004 indicated that pH was within the required range Results of the monthly self- <br /> monrtor>ng 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 /> 41- <br /> Drew <br /> 1Drew Van Allen <br /> Senior Project Manager �` � ,1> f4F �IN�,Hj� <br /> F - <br /> S <br /> Je e Homsey, P E _ <br /> CA Registered Civil Engineer No 47410 ;;�1�� �```;�_� K^�� �-e.P <br /> cc Mr and Mrs Raymond Farmer <br /> Mr Jeff Wong, SJCEHD <br /> S 1625961reportslwaterdischarg610_04 doc 2 <br />