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• <br />Chevron Products Company 2 <br />Former Chevron Service Station 99-5775, 301 West Kettleman Lane, Lodi, CA June 13, 2001 <br />Sampling <br />Constituent (pg/1) <br />Port <br />MtBE <br />TBA <br />EtBE <br />TAME <br />Ethanol <br />Methanol <br />Influent <br />1,700 <br />51 <br />57 <br />18 <br />95 <br />ND <br />mid -1 <br />27 <br />ND <br />ND <br />ND <br />17 <br />ND <br />mid -2 <br />ND <br />ND <br />ND <br />ND <br />19 <br />80 <br />Effluent <br />ND <br />ND <br />ND <br />ND <br />21 <br />ND <br />Explanations <br />ND = Not Detected above method detection limits <br />All additional petroleum hydrocarbons and fuel oxygenates were reported as below <br />detection limits. Current and historical analytical information is presented as Table 1. <br />Between April 25 and May 30, 2001, the GWE system discharged a total of 487,081 <br />gallons of treated groundwater over a period of 31 days (Table 2). As of May 30, 2001, <br />the GWE system has treated a total of 2,273,938 gallons. Calculated discharge rates <br />during the May monitoring period ranged from 7.34 to 8.28 gallons per minute (gpm). <br />During the May monitoring period the system extracted approximately 0.59 pounds of <br />TPHg, 0.006 pounds of benzene, and 5.32 pounds of MtBE. To date, the system has <br />extracted approximately 6.51 pounds of TPHg, 0.145 pounds of benzene, and 75.09 <br />pounds of MtBE. <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 <br />decay of plant material, and is believed to be unrelated to the former Chevron service <br />station. <br />System Modifications <br />There have been no system modifications during the May discharge period. <br />Summary of Violations <br />There have been no violations of the discharge limitations during the May discharge <br />period. <br />1:1Chevron19577510&M\Discharge Reporls\May-2001Oscharge Repart.doc <br />