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S e qu O l a 819 Striker Avenue, Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> AnalyticalFAX(916)921-0100 <br /> www.sequoialabs.corn <br /> Stratus Environmental Project: ARCO 5469,Stockton,CA <br /> 3330 Cameron Park Drive, Ste. 550 Sampled: 6/23/Q0 <br /> Project Number. NIA Received: 6/23/00 <br /> Cameron Park,CA 95682 Pro'ect Manaszer. Jay Johnson <br /> Reported: 7110/00 <br /> _.., ,. 9 Anal ti Sacra <br /> 7 <br /> Date Spike Sample QC Reporting Limit Recay. <br /> Analyte Analvzed Level Result Result Units Recov. Limits /o LimRPD RPD <br /> o it Notes* <br /> 0 <br /> /o <br /> Batch: 0060288 Date Pre tired: 713100 Extraction Method: EPA 5030B PIT <br /> B 1 a nk 0060288-B LKI <br /> Benzene 7/3100 <br /> Toluene ND ug/l 2.00 <br /> Ethylbenzene ND 2.00 <br /> " <br /> Xylenes(total) +� ND 2.00 <br /> ND . <br /> Surrogate: 1,2-DCA-d42.00 <br /> 50.0 55. 600-140 111 <br /> Surrogate: Toluene-d$ SD.0 54.44 . <br /> 60.0-140 101 <br /> Surrogate: 4-BFB 50.0 49.0 <br /> 60.0-140 98.0 <br /> LCS 0060288-B51 <br /> Benzene 713/00 50.0 51.8 uaJl 70.0-130 104 <br /> te <br /> Toluene 50.0 47.8 70.0-I30 104 <br /> Surroga : 1,2-DCA-d4 50.0 56.0 60.0-140 1 . WT -- <br /> ogate: Toluene-d8 50.0 <br /> 47.6 60.0-140 95.2 <br /> ogate: 4-BFB 54.0 46.2 60.0-140 92.4 <br /> LCS Dun 0060288-BSD1 <br /> Benzene 713100 50.0 48.8 ug/I <br /> Toluene 50.0 48.0 70.0-130 97.6 25,0 6.35 Surrogate: 1,2-DCA 70.0-130 96.0 25.0 0.418 <br /> -d4 50.0 56.2 60.0-140 112 <br /> Surrogate: Toluene-d8 50.0 49.6 60.0-140 99.2 <br /> Surrogate: 4-BFB 50.0 48.2 60.0-140 964 <br /> Batch: 0070016 Date Prepared: 716100 Extraction Method: EPA 5030E IP/TI <br /> Blank 0070016-13LK1 <br /> Benzene 716100 <br /> Toluene „ ND ug/l 2.00 <br /> Ethylbenzene ND 2.00 <br /> Xylenes(total) ND 2.00 <br /> 2.10 2.00 <br /> Surrogate: 1,2-DCA-d4 50.0 46.8 6 <br /> 60.0-140 93. <br /> Surrogate: Toluene-d8 50.0 51.8 60.0-140 3. <br /> Surrogate. 4-BFB 04 <br /> 50.0 48.8 60.0-140 97.6 <br /> LCS 000016-BSI <br /> Benzene 716/00 50.0 <br /> Toluene ,� 53.2 ug/l 70A-130 106 <br /> 50'0 55.8 70.0-130 112 <br /> Surrogate: 1,2-DC4-d4 50.0 47.2 60.0-140 94.4 -- <br /> Surrogate: Toluene-d8 50.0 51.4 60.0440 103 <br /> Surrogate: 4-BFB 50.0 48.8 60.0-!40 103 <br /> I <br /> 7.6 <br /> Sequoia Analytical Sacramento •Refer to end of report for text of notes and definitions. <br /> Page 9 of 13 <br />