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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> ,T) Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792 1865 FAX(707)792-0342 <br /> Gettler-Ryan-Sac Project Chevron 9-3232,Stockton,CA Sampled 10/29/98 to 10/30/98 <br /> 3164 Gold Camp Dr,Ste 240 Project Number 346463 01 Received 10/30/98 <br /> Rancho Cordova,CA 95670 Project Manager Todd Del Prate Reported 11110198, 11/13/98/13/98 <br /> Total Purgeable Hydrocarbons (C6-C12),BTTX and MTBE by DHS LUFTIQuality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analwed Level RestiR Result Units Recov Limits % Limit % Notes* <br /> Blank(Continued) 8110084-BLKi <br /> .Suri ogate aaa-7t rfltiorotolrrcne 11/9/98 0200 0202 nagllig 600-140 101 <br /> L, S 8110084-BSI <br /> Benzenc 1119198 0 200 0 223 mg/kg 700-130 112 <br /> Toluene 0 200 0 214 700-130 107 <br /> Ethylben7ene 0200 0 21 1 70 0-130 105 <br /> Xylenes(to(al) 0 600 0 627 700-130 104 <br /> Methyl tert-butyl ctht r 0200 0 215 700-110 108 <br /> Surrogate aaa-Mfli�oi olohiene 0200 0201 600-140 101 <br /> Matrix.SDAg 8110084-MS) S811044-05 <br /> Benzene 11/9/98 0200 ND 0202 mg/kg 600-140 101 <br /> Toluene 0200 ND 0 194 600-140 970 <br /> tiylbenzene 0 200 ND 0 192 600-14 96 0 <br /> enes(total) 0 600 ND 0 578 " 600-140 963 <br /> Methyl tert-butyl ether 0200 ND 0 188 600-140 940 <br /> Surrogate a a a-Trffhiorotoluene 0200 0204 600-140 102 <br /> Matrix Sinke.Du 81 10084-MSDI 5811044-05 <br /> Benzene l 119198 0 200 ND 0203 mg/kg 600-140 101 25 0 0 <br /> Toluene 0200 ND 0 189 600-140 945 25 0 2 61 <br /> Ethylbenccnc 0200 ND 0 194 600-140 97 0 25 0 1 04 <br /> Xylenes(total) 0 600 ND 0 583 600-140 972 250 0 930 <br /> Methyl tert-btityi ether 0200 ND 0 192 600-140 960 250 2 11 <br /> Surrogate aaa-7rrfltlaotolitenc 0200 0204 600-140 102 <br /> 56 DatePiepared. 11112/98 Extraction Method EPA5 3 <br /> Ulan S 8110156-BLKI <br /> Purgeable Hydrocarbons 11/12/98 ND mg/kg 1 00 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> EthylbenzenL ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether ND 0 0500 <br /> Surrogate aaa-Triflumotoluenc 0200 0 199 600-140 995 <br /> L,c�s 8110156-BS] <br /> Benzene 11/12/98 0200 0 231 mg/kg 700-130 116 <br /> Toluene 0200 0 215 700-130 108 <br /> Ethylbenzene 0 200 0 213 700-130 106 <br /> Imes(total) 0 600 0 634 700-130 106 <br /> equow alytical-Sacramento *Refer to cnd ofiepoit foi tcrt ofnotes and defuutions <br /> L da C Schneider, Laboratory Director Page 7 of 9 <br /> i <br />