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QUARTERLY OPERATION AND MAINTENANCE SAMPLING AN <br /> ASE is currently under conte ac.t to pei form quarterly operation a n d <br /> maintenance (O&M) activities and collect samples and prepai e a i epos t <br /> every 3 months to determine the effectiveness of the treatment system <br /> ASE will visit the site petiodically to check the petfoimance of the system, <br /> backilush the carbon canisters, it necessaiv, and repair any problems that <br /> arise <br /> ASE will also collect influent (pie-treatment), and after carbon canister <br /> (post-treatment) water samples eves y three months foi 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 hydrocaibons are <br /> breaking-through the first carbon canistei ASE will replace that canister <br /> 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 appropiiate regulatoiy agencies <br /> Should you have any question, or comments, please tee] ftee to give us a <br /> call at (925) 820-9391 <br /> Respectfully submitted, <br /> AQUA SCIENCE ENGINEERS, INC <br /> David Allen <br /> Senior Project Manager <br /> Cc Mr Frank Gutnta, Property Owner <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 />