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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento CA 95834 <br /> NO (916) 921-9600 • FAX (916) 921-0100 ^ <br /> Brown &Caldwell Client Project ID Arco #2133, Stockton Sampled Mar 11, 1992 <br /> 723 S St Sample Descript Water, Tank Received Mar 20, 1992 <br /> Sacramento, CA 95814 Analysis Method EPA 5030/8015/8020 Analyzed Mar 25, 1992 <br /> Attention Steve Minser Lab Number 203-0453 Reported Mar 26, 1992 <br /> TOTAL PETROLEUM FUEL HYDROCARBONS WITH BTEX DISTINCTION (EPA 8015/8020) <br /> Analyte Detection Limit Sample Results <br /> Ng/L (Ppb) Ing/L (ppb) <br /> Lowto Medium Boiling Point H rocar ons............. 3r�0/0�� r.r.r....... . .................«r.... 1 6000 <br /> Nenzene.. ............................«..........x............. 3 V r.r•r.r.r....•..r«.«r.r.r•r«...w 100 <br /> Toluene. - ---• •----- 3 Q . . .................... <br /> 36 <br /> Ethnzene.. ........ . ........ 30 ....... <br /> 5.5 <br /> Xylenes.. .......................................... 30 ......... . 160 <br /> Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard <br /> Analytes reported as N D were not present above the stated limit of detection Because matrix effects and/or other factors <br /> required additional sample dilution,detection limits for this sample have been raised <br /> SEQUOIA ANALYTICAL <br /> Michael R Giles <br /> Laboratory Director <br /> 2030453 BBB <1> <br />