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' FEELUENT AND INFLUENT SAMPLE COLLECTION AND ANALYSES i ' During the first 14 days of operation, an effluent water sample was collected and analyzed on a 24-hour turnaround basis to prove system ' operation compliance The City of Manteca Sewer Discharge Permit requires no detectable concentration of any compounds tested in the effluent water stream entering their sanitary sewer The first 8 samples ' were collected from the third carbon vessel in series, and each sample was identified as EFF (for effluent) and the date of the sampling The remainder of the samples were collected either from granulated activated ' carbon (GAC) vessel #1 or GAC #2 in an effort to determine the breakthrough point In these cases, the samples were identified as GAC 1 ' followed by the date or GAC 2 followed by the date When GAC 1 and GAC 2 were sampled, ASE also collected a sample from the next vessel in series and placed it on HOLD at the laboratory, as a back-up in case the sample being analyzed showed breakthrough All of these samples were analyzed by EIFF Analytical of Davis, California (ELAP #2236) for a full scan EPA Method 8260B which includes total petroleum hydrocarbons (TPH) as Igasoline, benzene, toluene, ethylbenzene, and xylenes (collectively known as BTEX), and the seven fuel oxygenates, and for TPH as diesel by EPA Method 8015 A breakthrough of tert-butanol (TBA) was identified in • GAC vessel 1 on October 17, 2000 The HOLD sample from GAC 2 was non-detect for all compounds At no time during this month's operation, did the effluent entering the sewer line contain any detectable concentrations of any of the compounds tested The effluent water sample analytical reports and chain of custody records are attached in Appendix B On October 4, 2000, ASE collected an influent water sample (INF 10-4-00) This sample was analyzed by KIFF Analytical of Davis, California (ELAP #2236) for a full scan EPA Method 8260B and for TPH as diesel by EPA Method 8015 The analytical results for this sample are tabulated in the Tables Section of this report as Table One The influent water sample analytical report and chain of custody record is attached in Appendix B The influent TPH-G concentration was used to calculate the estimated mass removed from the site during the month based on total gallons treated The Monthly Performance Log, in the Tables Section of this report, shows that based on the number of gallons extracted in the month of October 2000, and assuming a constant TPH-G concentration of 24,000 fparts per billion in the influent water stream, the system extracted approximately 7 55 gallons of gasoline from the groundwater beneath t h e I site Frank's One Stop Remediation System Monthly Report — October 2000 -3-