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r . <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 /> Sample Id. Result (in Pph) <br /> 17926-INF-03-25-02 16 <br /> 17926-GAC1-03-25-02 < 05 <br /> 17926-GAC2-03-25-02 Not Analyzed <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 t h e <br /> residence on the property <br /> QUARTERLY OPERATION._. AND MAINTENANCE, SAMPLING ._,._,A,ND <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 any <br /> problems that arise <br /> ASE will continue to collect influent (pre-treatment) and after carbon <br /> canister (post-treatment) water samples every three months for analysis <br /> of TPH-G, BTEX, the five fuel oxygenates, and lead scavengers by EPA <br /> 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, tenants, o u r <br /> client, and the appropriate regulatory agencies <br /> - 2- <br />