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. oxygenates, and lead scavengers by EPA Method 8260B A copy of t h e <br /> analytical report is attached in Appendix A <br /> The analytical results indicated concentrations of "MTBE only" in parts p e r <br /> billion (ppb) as follows <br /> Samale Id. Result (in ppb) <br /> 17950-INF-11-14-02 330 <br /> 17950-AS-11- 14-02 120 <br /> No other compounds were identified in any of the water samples <br /> (TAC CANISTER REC'YCLINCT <br /> On November 14, 2002, GAC #1 was removed, GAC #2 was placed i n <br /> position #1, and a new GAC canister was put in the #2 position Since it <br /> has become a pattern that GAC #1 is showing breakthrough each quarter, <br /> ASE now has a surplus of new canisters at the site As a part of routine <br /> quarterly O&M from now on, GAC #1 will be removed, GAC #2 will take its <br /> place, and a new GAC canister will be put into the #2 position Samples <br /> will no longer be collected from either of the GAC canisters <br /> • QUARTERLY OPFRAIION AND MAINTENANCE, SAMPLING AND <br /> REPORTING <br /> ASE is currently under contract to perform quarterly operation a n d <br /> maintenance (O&M) activities and collect samples and prepare a report <br /> every 3 months to determine the effectiveness of the treatment system <br /> ASE will continue to visit the site periodically to check the performance of <br /> the system, backflush the carbon canisters, if necessary, and repair any <br /> problems that arise <br /> ASE will continue to collect influent (pre-treatment) and after air- <br /> stripping water samples every three months for analysis of TPH-G, BTEX, <br /> the five fuel oxygenates, and lead scavengers by EPA Method 8260B ASE <br /> will prepare and issue a report in the following month that details t h e <br /> quarter's activities <br /> A copy of the quarterly report will go to the property owner, tenants, o u r <br /> client, and the appropriate regulatory agencies <br /> �4 <br /> 1 <br /> - 2- <br />