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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue e ue Suite LM • Concord, California 94520 ' <br /> (510) 686-9600 FAX (510) 686-9689 <br /> MPD : <:::::::<=>:=::>::>::::::> >::>:::>;>:::> :::::>:> <>::::>:> >< >::«:::»:»:::::>::::>::::>::<:>::::>:<:::::::>::>::>::::>::>::::: :::»::>::::»------>:: «=-----<:>;:>:»»:::<:::>::<=»>::::::::>::>::<:::<:::>:::<:><:::>::>< :::: ::>:: <br /> "*1S Services Client Protect ID. Unocal 0788,8203 East 11th Street,Tracy Sampled: Nov' 30, 1993;,;; <br /> 401 Stanwell Dr., Ste. 400 Sample Matrix: Water Received: Dec 1, 1993:;: <br /> Concord, CA 94520 Analysis Method: EPA 5030/8015/8020 Reported: Dec 16, 1993::;: <br /> Attention: Avo Avedessian First Sample#: 312-0115 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample <br />{ Analyte Limit I.D. I.D. I.D. I.D. I.D. <br /> pg/L 312-0115 312-0116 312-0117 312-0118 Method <br /> U-7 U-8 U-9 U-10 Blank <br /> Purgeable <br /> Hydrocarbons 50 N.D. N.D. N.D. - N.D. <br /> Benzene 0.5 N.D. N.D. N.D. N.D. <br /> Toluene 0.5 N.D. N.D. N.D. N.D. <br /> 1 <br /> Ethyl Benzene 0.5 N.D. N.D. N.D. N.D. <br /> Total Xylenes 0.5 N.D. N.D. N.D. N.D. <br /> l Chromatogram Pattern: <br /> i <br /> I <br /> Quality Control Data <br /> Report Limit Multiplication Factor: 1.0 1.0 1.0 1.0 1.0 . <br /> Date Analyzed: 12/10/93 12/10/93 12/10/93 12/10/93 12/10/93 <br /> f <br /> Instrument Identification: ML#2 ML#2 ML#2 ML#2 ML#2 <br /> Surrogate Recovery, %: 81 80 81 80 84 <br /> (QC Limits = 70-130%) . <br />{ <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard. <br /> Analytes reported as N.D.were not detected above the stated reporting limit. <br /> SEQUOIA ANA YTICAL <br /> i <br /> Alan . Kern <br /> i Project Manager <br />{ <br /> i 3120109.MPD <2> <br /> l <br />