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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> i <br /> Kaprealian Engineering, Inc Client Project ID Unocal#5421,7303 Pacific Ave,Stockton Sampled Nov 9, 1992 <br /> 2401 Stanwell Drive, Suite 400 Sample Matrix Sod Received Nov 11, 1992 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Nov 25, 1992 <br /> Attention Mardo Kaprealian, P E First Sample# 211-0460 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I.D LD I D I D I D I D <br /> mg/kg 211-0460 211-0461 211-0462 211-0463 211-0464 211-0465 <br /> EB1-(5) E131-(9 5) EB1-(15) EBI-(20) E61-(25) EB1-(30) <br /> Purgeable <br /> Hydrocarbons 10 N D N D N D 40 1 8 N D <br /> Benzene 0 005 N D N D Oil 010 017 0 038 <br /> Toluene 0 005 N D N D 0 015 027 020 0 019 <br /> Ethyl Benzene 0 005 N D N D 00069 014 0 085 0 028 <br /> Total Xylenes 0 005 N D N D 0 031 056 036 014 <br /> Chromatogram Pattern Gasoline Gasoline <br /> i <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 1 0 1 0 1 0 1 0 <br /> Date Analyzed 11/13/92 11/13/92 11/18/92 11/13/92 11/16/92 11/16/92 <br /> Instrument Identification HP-4 HP-4 HP-5 HP-4 HP-2 HP-2 <br /> Surrogate Recovery, % 107 107 99 106 104 101 <br /> (OC Limits = 70-130°x) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected above the stated reporting hint <br /> .SEQUOIA ANALYTICAL <br /> Scott A Chieffo <br /> Project Manager 2110460 KEI 1> <br />