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The analytical results indicated concentrations of "MTBE only" in parts per <br /> billion (ppb) as follows <br /> Sample Id. Result (in PPb <br /> 17933-INF-05-14-02 1 2 <br /> 17933-GAC1-05-14-02 < 05 <br /> 17933-GAC2-05-14-02 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 /> residences on the property <br /> QUARTERLY OPERATION AND MAINTENANCE, SAMPLING AND <br /> REPORTTN[T <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), after air-stripping, <br /> and after carbon canister (post-treatment) water samples every three <br /> months for analysis of TPH-G, BTEX, the five fuel oxygenates, and lead <br /> scavengers by EPA Method 8260B ASE will prepare and issue a report in <br /> the following month that details the quarter's activities Should it b e <br /> determined that hydrocarbons are breaking-through the first carbon <br /> canister, ASE will 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 Should you have any <br /> questions or comments, please feel free to give us a call at (925) 820- <br /> 9391 <br />