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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM + Concord, California 94520 J U L 2 9 1992 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> i <br /> ton Geosclence ClieriiProject`1D:v MobD` 4d 4.3%30-013G-10 ": ,Sampled: 7/20'- 7%21%92 <br /> `5870 Stonerldge Drtve, Suite 6 Sample Matrbc: Water Received: Jul 22, 1992 <br /> Pleasanton, CA 94588 Analysis Method: EPA 5030/8015/8020 Reported: Jul 28, 1992 <br /> Attention: Stephan Rosen First Sample : 207-0734 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I.D. I.D. I.D. I.D. I.D. I.D. <br /> pg/L 207-0734 207-0735 207-0736 207-0737 207-0738 207-0739 <br /> AW-2 AW-4 AW-8 AW-0 AW-7 AW-5 <br /> Purgeable <br /> Hydrocarbons 50 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Benzene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Toluene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Ethyl Benzene 0.5 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Total Xylenes 0.5 N.D. N.D. N.D. N.D. N.D. N.D. <br /> Chromatogram Pattem: -- -- -- -- -• -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor. 1.0 1.0 1.0 1.0 1.0 1.0 <br /> Date Analyzed: 7/23/92 7/23/92 7/23/92 7/23/92 7/23/92 7/23/92 <br /> Instrument identification: HP-2 HP-2 HP-2 HP-2 HP-2 HP-2 <br /> Surrogate Recovery, %: 107 107 107 107 107 105 <br /> (QC L€mlts a 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard. <br /> Malytes reported as N.D.were not detected above the stated reporting limit. <br /> SEQUOIA ANALYTICAL <br /> r <br /> ZA Chi o 207073+JU.T <t <br /> Project Manager <br />