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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)9Z1-0100 <br /> Analytical www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168 Stockton CA <br /> 3330 Cameron Park Dr PrglectNumber N/A Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 02/08/01 13 34 <br /> Total Purgeable Hydrocarbons (C6-Cf2) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analvte Result Limit Units Level Result :aREC Limits RPD Limit Notes <br /> Batch 0120012-EPA 5030B (P/T) <br /> BIank(0120012-BLKI) Prepared&Analyzed 12/01/00 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 <br /> Surrogate a a a-Trti luorotoluene 730 100 730 60-140 i <br /> LCS(0120012-SSI) Prepared&Analyzed 12/01/00 <br /> Benzene 106 0 500 ug/l 100 106 70-130 <br /> Toluene 105 0 500 100 105 70-130 <br /> /benzene 104 0 500 100 104 70-130 <br /> es(to'al) 31 1 0 500 30 0 104 70-130 <br /> Surrogate a a a-Thuorotoluene 8.16 IO 0 81 G 60-140 <br /> Matrix Spil.e(0120012-MS1) Source 5011299-06 Prepared&Analyzed 12/01/00 <br /> Benzene 914 0 500 ug/l 100 ND 914 60-140 <br /> Toluene 9 88 0 500 100 ND 98 8 60-140 <br /> Ethylbenzene 994 0 500 100 ND 994 60-140 <br /> Xylenes(total) 28 8 0 500 300 ND 960 60-140 <br /> Surrogate a a a-Trti luorotoluene 834 100 834 60-140 <br /> Matrix Spike Dup(0120012-MSD1) Source S011299-06 Prepared&Analyzed 12/01/00 <br /> Benzene 102 0 500 ug/l 100 ND 102 60-140 110 25 <br /> Toluene 103 0 500 100 ND 103 60-140 4 16 25 <br /> Ethylbenzene 104 0 500 100 ND 104 60-140 452 25 <br /> Xylenes(total) 31 2 0 500 300 ND 104 60-140 Soo 25 <br /> Surrogate act a Trifluorotoluene 829 100 T 829 �60-140 ^� <br /> oia An y'tical - Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report ntust be reproduced to its entirety <br /> Page 14 of 19 <br />