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Chevron Products Cornpany Page 2 <br />Former Chevron Service Station #9-5775 01 West Kettleman Lane, Lodi California Aupust 15 2002 <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 Lodi 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 July discharge period. <br />SUMMARY OF VIOLATIONS <br />There have been no violations of the discharge limitations during the July discharge <br />period. <br />I:IChevron1957751Periodic Monitoring\O & WReportsWonthlyUscharge Reports120021July 20021July 2002 DR.doc <br />