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analytical report is attached in Appendix A <br /> Y P PP i <br /> The analytical results indicated concentrations of "MTBE only" in parts p e r <br /> billion (ppb) as follows <br /> Sample Id. _ Result (in ppb) <br /> 17950-INF-08-22-02 360 <br /> 17950-AS-08-22-02 160 <br /> No other compounds were identified in any of the water samples <br /> GAC CANISTER RECYCLING <br /> On August 22, 2002 GAC #1 was removed from the site for off-site <br /> recycling GAC #2 was placed in position #1, and a new GAC canister w a s <br /> put in the #2 position Since it has become a pattern that GAC #1 is <br /> showing breakthrough each quarter, ASE now has a surplus of new <br /> canisters at the site As a part of routing quarterly O&M from now on, GAC <br /> #1 will be removed, GAC #2 will take its place, and a new GAC canister will <br /> be put into the #2 position Samples will no longer be collected from either <br /> of the GAC canisters <br /> QUARTERLY_ OPERATION AND MAINTENANCE. SAMPLING AND <br /> REPORTING <br /> ASE is currently under contract to perform quarterly operation and <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 a n y <br /> problems that arise <br /> ASE will continue to collect influent (pre-treatment) and after air-stripping <br /> water samples every three months for analysis of TPH-G, BTEX, the five <br /> fuel oxygenates, and lead scavengers by EPA Method 8260B ASE will <br /> prepare and issue a report in the following month that details the quarter's <br /> 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 /> -2- <br />