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• 011ARTERLY OPERATION AND MAINTENANCE, SAMPLING <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 visit the site periodically to check the performance of the system, <br /> backflush the carbon canisters, if necessary, and repair any problems that <br /> arise <br /> ASE will also collect influent (pre-treatment), and after carbon canister <br /> (post-treatment) water samples every three months for analysis of TPH-G, <br /> BTEX, the five fuel oxygenates, and lead scavengers by EPA Method 8260B <br /> ASE will prepare and issue a report in the following month that details the <br /> quarter's activities Should it be determined that compounds ate <br /> breaking-through the first carbon canister ASE will replace that canister <br /> 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 /> Should you have any questions or comments, please Leel free to give m a <br /> call at (925) 820-9391 <br /> Respectfully submitted, <br /> AQUA SCIENCE ENGINEERS, INC <br /> L <br /> (av <br /> Allen <br /> Senior Project Managei <br /> Cc Mr Frank Gutnta, Client <br /> Mr Don Thompson <br /> Ms Lori Duncan, San Joaquin County PHS-EHD <br /> Mr Marty Hartzell, RWQCB <br /> Mr Mark Owens, UST Cleanup Fund <br /> - 3 - <br />