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Sequoia 819 Striker Avenue,5583 8 <br /> Sacramento,CA 95834 <br /> 6 (916)921-9600 <br /> FAX(916)921-0 100 <br /> Analytical <br /> nalyt c l www secluoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 2168, Stockton,CA Reported <br /> Cameron Park CA, 95682 Project Manager Steve Carter 12/21/0109 27 <br /> Total Purbeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source °/OREC RPD <br /> (Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br /> Batch 1120235- EPA 5030B (PIT) <br /> Blank(1120235-BLKl)_ _ - Prepared&Analyzed 12/17/01 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trtfluorotoluene _ �9 77 1190 � 97 7 60-140 ��- <br /> LCS(1120235-BSI) T _ _ W __ Prepared&Analyzed 12/17/01 <br /> Benzene 105 050 5gA 100 105 70-130 <br /> Toluene 936 050 100 936 70-130 <br /> Ethylbenzene 8 16 050 100 816 70-130 <br /> �lenes(total) -__ -_-_ 25 5_- 0 50 — _ 300 W Y_85 0 70-130 <br /> Surrogate a a a-TrijZuorotoluene 105 100 105 60-140 <br /> Matrix Spike(I120235-MS1)_ _Source S112159-11 Prepared&Analyzed 12/17/01 <br /> Benzene 992 0 50 ug/l WO ND 992 60-140 <br /> Toluene 8 91 050 100 ND 891 60-140 <br /> Ethylbenzene 799 050 100 ND 79 8 60-140 <br /> Xylenes(total) 239 0 50 300 ND 79 7 60-140 <br /> Surrogate a a a Tr fluorotoluene 109 100 109 60-140 W <br /> Matrix Spike Dup(1120235_M_SD1) _Source 5112159-11 Prepared&Analyzed 12/17/01 ____ <br /> Benzene _ 109 050 ug/l 100 ND 109 60-140 104 25 <br /> Toluene 9 86 0 50 100 ND 986 60-140 101 25 <br /> i <br /> Ethylbenzene 8 68 050 100 ND 868 60-140 940 25 <br /> Xylenes(total) 270 050 300 ND 900 60-140 122 25 <br /> Surrogate a a a-Trifluorotoluene 105 _ - 10 R -� - 105 60-140 <br /> equoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 12 of 14 <br />