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I <br /> A N A L Y T I C A L <br /> LABORATORIES <br /> COMPONENT 2/11/99 RESULTS 2/11/99 FID RESULTS 3/I9/99 RESULTS <br /> Benzene 1.9 ug/L 2.6 ug/L 5.8 ug/L <br /> Toluene <0.3 ug/L 0.3 ug/L 0.83 ug/L <br /> Ethylbenzene <0.3 ug/L 0.6 ug/L 1.3 ug/L <br /> Total Xylenes <0.3 ug/L 0.6 ug/L L I ug/L <br /> MTBE <5 ug/L 1.3 ug/L 21 ug/L <br /> TPH-Gasoline <50 ug/L 30 ug/L 95 ug/L <br /> The concern regarding the original 2/11/99 results was the absence of detectable BTEXG (except <br /> for benzene). The FID results, while not as accurate as the PID results that are normally used for <br /> BTEX calculations, do show there were detectable concentrations at or below detection limits. <br /> (The MTBE and TPH-Gasoline FID results are below detection limits). For sample constituents <br /> that are typically very near detectable amounts, this is not unusual behavior. <br /> BSK Analytical Laboratories regrets the error that occurred with the reporting of the <br /> contaminated results for monitoring wells MW-5, MW-7S, and MW-7D. If you have any further <br /> questions, or need additional explanations for your client or regulating agency, please do not <br /> hesitate to give me a call at 1-800-877-8310. <br /> Sincerely, <br /> I <br /> j oelewyn <br /> Laboratory Director <br /> I <br /> I <br /> , <br /> 1414 Stanislaus Street Fresno, CA 93706-1623 Phone 559-497-2888, In CA 800-877-8310 • Fax 559-485-6935 <br /> I <br />