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Chevron Products Company Page 2 <br />Fomker Chevron Service Station #9-5775.301 West Kettleman Lane,,Lo(b. California September 16. 2002 <br />benzene, and MtBE concentrations versus time are shown on Figures 4 and 5 <br />respectively Certified analytical reports and chain -of -custody documentation and <br />remedial system operation and maintenance field data sheets are included in Attachments <br />A and B respectively <br />DISCHARGE OF ETHANOL AND METHANOL <br />As discussed with Mike Schafer with the City of Loch during April 2001, discharges of <br />methanol and ethanol to the industrial sewer system at concentrations similar to those <br />found in the remediation system's effluent stream do not constitute a significant threat to <br />the local treatment system In accordance with this conversation, discharges of low <br />concentrations of methanol and ethanol are not considered violations of the discharge <br />limitations The presence of ethanol and methanol is thought to be attributed to the decay <br />of plant material, and is believed to be unrelated to the former Chevron service station <br />SYSTEM MODIFICATIONS <br />There were no system modifications during the August discharge period <br />SUMMARY OF VIOLATIONS <br />There have been no violations of the discharge limitations dunng the August discharge <br />• period <br />Ll <br />1Chevron1957751Penodtc Momtonng\O & M\ReportsWouthly\Discharge Reports12002raugust 20021August 2002 DR doe <br />