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Sequoia 819 Straker Avenue Suite S <br /> 1 Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX 1916)921.01°° <br /> Gettler-Ryan-Rancho Cordova Project Tosco 46981 Stockton,CA Sampled 1128100 <br /> 3164 Gold Camp Dr Ste 240 Project Number N/A Received 1128100 <br /> Rancho Cordova CA 95670 Project Manager Steve Carter Reported 2111100 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE in Air by DHS LOFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Bitch 0020028 Date Prepared 1128/00 Extraction Method EPA 50306 PIT <br /> Blank 0020028-BLK 1 <br /> Purgeable Hydrocarbons 1/28100 ND mg/ml Air 10 0 <br /> Benzene ND 00500 <br /> Toluene ND 00500 <br /> Eth)[benzene ND 00500 <br /> Xylenes(total) ND 00500 <br /> Methvl tert-butyl ether ND 0 500 <br /> Surrogate a a a-Trifluorololuene 2 00 191 600-140 9> <br /> LCS 0020028-BSI <br /> Benzene 1128100 200 196 mg/ml Air 700-130 98 0 <br /> Toluene 200 196 700-130 98 0 <br /> Ethylbenzene 200 1 95 700-130 97 5 <br /> _Wnes{total} " 600 600 --- 700-130 100 - — <br /> hyl.tert-butyl ether _ _ __��__2 00 202 " _70 0-130 101 <br /> Surrogate a a a-Tiifluorotoluene 2 00 1 89 60 0-1 f0 44 <br /> LCS Dun 0020028-BSD1 <br /> Benzene 1/28100 200 205 mg/ml Air 700-130 102 25 0 400 <br /> Toluene 200 205 700-130 102 25 0 4 00 <br /> Ethylbenzene 200 195 700-130 975 25 0 0 <br /> XNIenes(total) 600 626 700-130 104 25 0 3 92 <br /> Methyl_ter_t-butyl ether __ _ 2 00 1 51 700-130 _75 5 _25 0 289 _ 2 <br /> Sui rogate a a a Traflua ololuerre 2 00 187 60 0-1�0 93 5 <br /> Sequoia Anal)tical-Sacramento *Refer to end of report for text of notes and definwons <br /> Page 6 of 10 <br />