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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> i68-93-�, Stockton Sampled 10/6,7/93 <br /> R68N"A industries ry Client Protect ID Arco 2 <br /> 3164 Gold Camp Dr, Suite 200 Sample Matra Sod Received Oct 8, 1993 <br /> Rancho Cordova, CA 95670 Analysis Method EPA 5030/8015/8020 Reported Oct 21, 1993 <br /> Attention David Stavarek First Sample# 310-0215 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D. I D. LD I.D. <br /> mg/kg 310-0215 310-0216 310-0217 310-0218 <br /> S-205-820 S-34 5-820 S-15 5-621 S-34 5-B21 <br /> urges a 180 N D 430 <br /> Hydrocarbons 10 <br /> 1,300 <br /> Benzene 0 005 069 0 43 N D 12 <br /> Toluene 0 005 33 0 68 N D 35 <br /> Ethyl Benzene 0 005 51 026 N D 26 <br /> Total Xylenes 0 005 13 1 3 N D 16 <br /> Chromatogram Pattern Gasoline Gasoline -- Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 50 50 1 0 20 <br /> Date Analyzed 10/18/93 10/18/93 10/18/93 10/19/93 <br /> Instrument Identification HP-1 HP-1 HP-1 HP-1 <br /> Surrogate Recovery, % 128 112 92 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against afresh gasoline standard <br /> Anaiytes reported as N D were not detected above the stated reporting limit <br /> EQUOIA ANALYTICAL Please Note <br /> *Matrix interference <br /> ,' nda C Schneider <br /> Protect Manager <br /> 3100215 RES <1> <br />