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r <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 960`) FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramcnto CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Secor International Project Unocal 8671,Stockton,CA Sampled 5/11/98 <br /> 9912 Business Park Drive, Ste 100 Project Number N/A Received 5/11198 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 5/13,5/27/98 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> PL-4(continued) S805137-04 5411 <br /> Methyl tert-butyl ether 8050121 5112/98 5/12/98 250 ND mg/kg <br /> Surrogate a,a,a-Trifluorotoluene 600-140 990 % <br /> EL-5 S805137-05 S-Qd <br /> Purgeable Hydrocarbons 8050121 5/12/98 5/12/98 1 00 ND mg/kg <br /> Benzene 000500 ND " <br /> Toluene 000500 ND " <br /> Ethylbenzene 000500 ND " <br /> Xylenes(total) 000500 ND " <br /> Methyl tert-butyl ether 00500 138 " <br /> Surrogate a a a-Trifluorotoluene 600-140 92 5 % <br /> P-G- 5805137-0� S4il <br /> urgeable Hydrocarbons 8050239 5/19/98 5/19/98 100 ND mg/kg <br /> nzene 000500 ND <br /> oluene 000500 ND " <br /> Ethylbenzene 000500 ND " <br /> Xylenes(total) 000500 00100 " <br /> Methyl tert-butyl ether 00500 ND " <br /> Surrogate a a,a-Triuorotoluene 600-140 960 % <br /> LG--Z S805137-07 5411 <br /> Purgeable Hydrocarbons 8050239 5/19/98 5119198 Soo 222 mg/kg 2 <br /> Benzene 0 250 ND " <br /> Toluene 0 250 ND " <br /> Ethylbenzene 0 250 ND " <br /> Xylenes(total) 0 250 151 " <br /> Methyl tert-butyl ether 250 ND " <br /> Surrogate a a a-Trifluorotoluene 600-140 102 YO <br /> PG-3 5805137-08 SDA <br /> Purgeable Hydrocarbons 8050239 5/19/98 5/19/98 100 504 mg/kg 1 <br /> Benzene 0 500 ND " <br /> Toluene 0 500 276 " <br /> Ethylbenzene 0 500 378 " <br /> Xylenes(total) 0 500 543 " <br /> Methyl tert-butyl ether 500 ND " <br /> Surrogate a a,a-Trtluorotoluene 600-140 101 % <br />*equoia-Analytical- *Re*Refer to end o re ort or text o notes and definitions <br /> 5acram nto l .f P f ./� <br /> Linda C Schneider, Laboratory Director Page 3 of 10 <br />