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ChLvron Products Company Page 2 <br />Former Chevron Service Station #9-5775, 301 West Kettlernan Cane, Codi California September 18 2001 <br />• the GWE system has treated a total of 3 127 102 gallons Calculated discharge Y g rates during <br />the August monitoring period ranged from 6 36 to 5 69 gallons per minute (gpm) <br />During the August monitoring period the system extracted approximately 0 15 pounds of <br />TPHg, 0 001 pounds of benzene, and 1 48 pounds of MtBE To date, the system has <br />extracted approximately 7 07 pounds of TPHg, 0 150 pounds of benzene, and 80 03 pounds <br />of MtBE Plots of GWE system mass removal trends and influent groundwater TPHg, <br />benzene, and MtBE concentrations versus time are shown on Figures 4 and 5, respectively <br />Certified analytical reports and chain -of -custody documentation and remedial system <br />operation and maintenance field data sheets are Included in Attachments A and B, <br />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 found <br />in the remediation system's effluent stream do not constitute a significant threat to the local <br />treatment system In accordance with this conversation, discharges of low concentrations of <br />methanol and ethanol are not considered violations of the discharge limitations The <br />presence of ethanol and methanol is thought to be attributed to the decay of plant material, <br />. and is believed to be unrelated to the former Chevron service station <br />SYSTEM MODIFICATIONS <br />0 <br />There have been no system modifications during the August discharge period <br />SUMMARY OF VIOLATIONS <br />There have been no violations of the discharge limitations during the August discharge <br />period <br />11Chevron19577510&M\Discharge ReportslAugust-2001\Discharge Report doe <br />