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819 Striker Avenue,Suite 8 <br /> Sp • Sacramento,CA 95834 <br /> e o u Ol a (916)921-9600 <br /> 1 FAX(916)921-0100 <br /> Analytical www sequoialabs corn <br /> Stratus Environmental Project ARCO 2168, Stockton, CA Sampled 8130/00 <br /> 3330 Cameron Park Drive, Ste 550 Project Number NIA Received 911100 <br /> Cameron Park,CA 95682 Project Manager Jay Johnson Reported y9121,27100 <br /> a^'sa �^ x...�'"' '%k L i^ �.. .=.'�3 " ';,. 'q'���— �+r-� { t 3 'n'�•�.,�'m J� �"���Y 4 Li'"' �n '�'�r'��"��.' .�` <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> LCS 0090163-BS 1 <br /> Benzene 9115100 500 55 8 ug/l 700-130 112 <br /> Toluene 50 0 56 4 700-130 113 <br /> Surrogate 1,2-DCA-d4 500 51 2 600-140 102 <br /> Surrogate Toluene-d8 500 560 600-140 112 <br /> Surrogate 4-BFB 500 522 600-140 104 <br /> TICS Dup 0090163-BSD1 <br /> Benzene 9115100 500 55 0 ug/l 70 6-130 110 25 0 1 80 <br /> Toluene 50 0 562 700-130 112 250 0 889 <br /> Surrogate 1,2-DCA-d4 500 514 600-140 103 <br /> Surrogate Toluene-d8 500 568 60 0-140 114 <br /> Suri ogate 4-BFB 500 522 <br /> 60 0-140 104 <br /> ix Spike 0090163-MS1 5009081-02 <br /> Benzene 9115100 500 ND 55 6 ug/1 700-130 111 <br /> Toluene 500 ND 556 700-130 111 <br /> Surrogate 1 2-DCA-d4 50 0 502 " 600-140 100 <br /> Surrogate Toluene-d8 500 562 600-140 112 <br /> Sui rogate 4-BFB 500 518 600-140 104 <br /> Matrix Spike Duo 0090163-MSDI 5009081-02 <br /> Benzene 9/15/00 500 ND 53 8 ug/i 70 0-130 108 25 0 2 74 <br /> Toluene 11 500 ND 560 700-130 112 250 0 897 <br /> Surrogate 1,2-DCA-d4 500 500 600-140 100 <br /> Surrogate Toluene-d8 500 570 „ 600-140 114 <br /> Surrogate 4-BFB 500 52 4 600-140 105 <br /> Batch 0090165 Date Prepared 9119100 Extraction Method EPA 50308 JPM <br /> Blank 0090165-BLKl <br /> Benzene 9119100 ND ug/l 2 00 <br /> Toluene ND 200 <br /> Ethylbenzene ND 200 <br /> Xylenes(total) ND 200 <br /> Surrogate 1,2-DCA44 500 444600-140 I 88S <br /> Surrogate Toluene-d8 500 532 600-140 106 <br /> Surrogate 4-BFB 500 512 600-140 102 <br /> LCS 0090165-BSI <br /> Benzene 9119100 500 546 ug/1 600-140 109 <br /> Wn C <br /> " 500 53 8 " 600-140 108 <br /> gate 12-DCA44 Soo 468 60 0440 936 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 17 of 22 <br />