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Sequoia toss McDowell Blvd North Ste49 4 <br /> Petaluma,CA 94954 <br />-- - -Analytical - -- _ _ _ _ _ -- _ _ _ -- _ -- (707)192 1265 <br /> - <br /> - -FAX(707)792-0342 <br /> WWW Sequolidabs Coin <br /> 1 <br /> ' Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P503205 <br /> 3017 Kdgare Road Suite 100 Project Number WR 63964 geparted <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 03/30/05 12 44 <br /> ' Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result limit Units Qiluttan Batch Prepared Analyzed Method Nate <br /> 1NIF(P503205-04)Water Sampled 03/15/05 12 50 Received 03/16/05 1140 <br /> Benzene 15 10 ug/1 20 5030223 03/22/05 03/22/05 EPA 82608 <br /> Ethylbenzene I 10 , <br /> Methyl Cert-butyl ether 620 10 ^ <br /> Toluene 69 10 , <br /> xylenes(total) 100 10 ^ <br /> Surrogate Dibromofluoromethane 98% 84-122 <br /> ' Surrogate 1,2-Dtehforoerhone-d4 103 r/o 74-135 <br /> Surrogate Toluene-d8 97% 84-119 ^ » ^ <br /> ' AS-EFF(P50320545)Water Sampled 03/15/0512 45 Received 03/16/0511 40 <br /> Benzene ND 050 ugll 1 5030223 03/22/05 03/22/05 EPA 826013 <br /> Ethylbenzene ND 050 ^ • , , <br /> Methyl tert-butyl ether 15 050 • , <br /> Toluene ND 050 X Y <br /> Xylenes(total) ND 050 <br /> Surrogate D,bromofluoromerhane 97% 84-122 <br /> ' Surrogate 12-Dtchloroethane-d4 102% 74-133 « ^ » w <br /> Surrogate Toluene-d8 98% 84-119 ^ , <br /> MID-1(P503205-06)Water Sampled 03/15/05 12 40 Received 03/16/0511 40 <br /> Benzene ND 050 u84 1 5030223 03122/05 03/22/05 EPA 82608 <br /> ' Ethylbenzene ND 050 . <br /> Methyl tert butyl ether ND 050 , <br /> Toluene ND 050 , ^ <br /> Xylenes(total) ND 050 ^ <br /> ' Surrogale Dubromofluorotrrethane 98% 84-172 ^ , <br /> Surrogate 1,2-Dichl0roedone-d4 101% 74-133 « , <br /> Surrogate Toluene-d8 96% 84-119 <br /> 1 <br /> Sequoia Analytical-Petaluma 7hc rtsules/n rhts report apply ra the samples analysed in accordance with Nsa chain of <br /> crestody document I Mfrs r otherwise stated,-sults are reported on a wet weight bas,, <br /> Da arralytical report must be reproduced in lu enrlrety <br /> Page 9 of 20 <br />