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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 per <br /> billion (ppb) as follows <br /> Sample Id. -- Result (in V11b) <br /> 17886-INF-04-23-02 1 1 <br /> 17886-GAC1-04-23-02 c 05 <br /> 17886-GAC2-04-23-02 Not Analyzed <br /> 17886-IRR-04-23-02 < 05 <br /> No other compounds were identified in any of the water samples At no <br /> time did water containing MTBE enter the plumbing system of the <br /> residences on the property <br /> QUARTERLY OPERATION 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 irrigation well, influent (pre-treatment) a n d <br /> after carbon canister (post-treatment) water samples every three months <br /> for analysis of TPH-G, BTEX, the five fuel oxygenates, and lead scavengers <br /> by EPA Method 8260B ASE will prepare and issue a report in the following <br /> month that details the quarter's activities Should it be determined that <br /> hydrocarbons are breaking-through the first carbon canister, ASE will <br /> replace that canister with a new one <br /> A copy of the quarterly report will go to the property owner, our client, <br /> and the appropriate regulatory agencies <br /> - 2- <br />