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819 Striker Avenue Suite 8 <br /> Sequoia Sacram 916)9 195834 <br /> FAX(916)921-0 100 <br /> Analytical www sequotalabs Com <br /> SECOR International- Rancho Cordova Project ARCO 595, Stockton,CA <br /> 3017 Kilgore Road Suite l00 Project Number N/A Reported <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky 05/24/01 09 30 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting SPIkL Source %REC RPD <br /> AnaMe Result Limit Units Lwll RLsult %REC Limits RPD Limit Note% <br /> Batch 1050195- EPA 50308 (PIT) <br /> Blank(1050195-BLKI) PreparLd& Analyzed 05/14/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 <br /> X)lens(total) ND 0 500 " <br /> Methyl terl-butyl ether ND 2 50 <br /> Surrogate a a a-Trifluorotoluenc - 8 61 — �- 100 861 60-130 <br /> L.CS(1050195-BSI) -Prepared& Analyzed 05114101_ <br /> Benzene 751 0 500 ug/l 10 0 75 1 70-130 <br /> Toluene 867 0 500 100 867 70-130 <br /> lbenzene 933 0 500 10 0 93 3 70-130 <br /> nes(total) 287 0 500 300 95 7 70-130 <br /> Methyl teri-butyl ether 7 04 2 50 100 704 70-130 <br /> Surrogate aaa-Trifluorotoluene- �- 873 - 100�� —_ 873 � 60-140 <br /> Matrix Spike(1050195-MS1) _ _ Source S105174-04 Prepared&Analyzed 05/14/01 <br /> Benzene 739 0 500 ug/1 10 0 ND 73 9 60-140 <br /> Toluene 8 89 0 500 10 0 ND 889 60-140 <br /> Ethylbenzene 9 13 0 500 100 ND 91 3 60-140 <br /> Xvlenes(total) 28 5 0 500 300 ND 95 0 60-140 <br /> Methyl tert-butyl ether 6 04 250 100 ND 604 60-140 <br /> Surrogate a a a-Trrrluorololuene 831 100 83 1 60-140 <br /> Matrix Spike Dup(1050195-MSDQ _Source S105174-04 Prepared&Analyzed 05/14/01 --- <br /> Benzene 726 0 500 ug/l 100 ND 72 6 60-140 l 77 25 <br /> Toluene 867 0 500 100 ND 86 7 60-140 251 25 <br /> Ethylbenzene 900 0 500 100 ND 900 60 140 1 43 25 <br /> Xylenes(total) 28 2 0 500 300 ND 940 60-140 1 06 25 <br /> Methyl tert-butyl ether 608 250 - _ 100 ND J_ 608 _60-140 0 660 25 <br /> Surrogate a a a-Triuorotoluene 790 100 790 60-140 <br /> uoia Analytical- Sacramento The results in lhrs report apply to lite samples analyzed in accordance with the chain of <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 8 of 1 l <br /> r+�;4 <br />