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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 Yd --- Result (in—VVb) <br /> 17883-INF-01-16-03 1 6 <br /> 17883--GAC1-01 -16-03 < 05 <br /> 17883-GAC2-01-16-03 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 the <br /> residence on the property <br /> SEMI-ANNUAL OPERATION A D MAINTENANCE, SAMPLING AND <br /> REPORTING <br /> ASE is currently under contract to perform semi-annual operation a n d <br /> maintenance (O&M) activities and collect samples and prepare a report <br /> every 6 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 six months for analysis of <br /> TPH-G, BTEX, the five fuel oxygenates, and lead scavengers by EPA Method <br /> 8260B ASE will prepare and issue a report In the following month that <br /> details the site's activities Should It be determined that hydrocarbons are <br /> breaking-through the first carbon canister, ASE will replace that canister <br /> with a new one <br /> A copy of the semi-annual report will go to the property owner, o u r <br /> client, and the appropriate regulatory agencies <br /> -2- <br />