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v1117 Lone Palm Avenue, Suite B <br /> Modesto, CA 95351 <br /> VJ%TC www atc-enviro com <br /> 209 579 2221 <br /> A S S O C I A T E S I N C <br /> Fax 209 579 2225 <br /> SELF-MONITORING RESULTS <br /> From the date of its startup, December 20, 2002, through March 27, 2003, the groundwater <br /> treatment system had an average flowrate of 0 90 gallons per minute (gpm) and 1,291 gallons per <br /> day (gpd) and a total discharge of 101,142 gallons During the reporting penod for March 2003, <br /> the groundwater treatment system had an average flowrate of 0 89 gpm and 1,291 gpd and a total <br /> discharge of 15,597 gallons The LEL did not exceed 10% during the March 2003 monitoring <br /> period The treatment system was not operational for a period of approxunately 10 ten days due <br /> to mechanical difficulties with the thermal oxidizer unit <br /> Final treated groundwater samples (Effluent) collected on March 21, 2003, contained no <br /> detectable concentrations of total petroleum hydrocarbons, TPHg, BTEX, MTBE, ETBE, TBA, <br /> TAME, DIPE, 1,2-DCA, or EDB Final treated groundwater samples (Effluent) collected on <br /> March 21, 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 /> If you require any additiorial information,please contact our office at (209) 579-2221 <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> LLQ' At� <br /> Drew Van Allen <br /> Senior Project Manager <br /> fhyrN'it,^fS+1-l�'3rt K h <br /> Jeanne Homsey, P E <br /> CA Registered Civil Engineer No 47410 <br /> cc Mr and Mrs Raymond Farmer <br /> v , <br /> A-Z-10-3 <br /> y j R <br /> i <br /> w lwordpro1625961reportslwaterdischarge103_03 dor 2 <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />