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Y l \��uO�— 680ChesapeakeUnvc Kc�waUat t[y, C q yguos �ary�3o4 you <br /> a MA[4`[9)364 9�3 <br /> 404 N Witset Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> �,,, Analytical 819 Striker Avenue,Suite 8 Sacramento, CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> J <br /> I <br /> ara r rr r{.frnwr,vn „w"r..tr•, ,.,rr rr,rr ..,Nf�/ r 7f',.r t>tr..'.r v„ h....va <br /> `EnvirosNr ' " Client Project lb Shell 6131 Pacific, Stockton �nr <br /> 270 Perkins Ave Matrix Solid <br /> -,,Sonoma, CA 95476 <br /> Fr <br /> `Attention Joe Neely Work Order# 9707310-05 F n Reported `r Y Jul 21, 1997 , <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl - - Xylenes Gas _ <br /> Benzene <br /> OC Batch#. GC071597BTEXEXA GC071597BTEXEXA GC071597BTECE(A GC071597STEXEXA GC071597BTEXEXA <br /> - —Analy.-Method:---EPA 8020 ---------EPA 8020- ---EPA 6020---- -----___EPA 8020 -- ------— -EPA 8015M — - <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Porter A.Porter A.Porter k Porter A Porter <br /> MS/MSD # 970731006 970731006 970731006 970731006 970731006 <br /> Sample Conc : N D N D N D N D --N D <br /> Prepared Date: 7/15/97 7/15/97 7/15/97 7/15/97 7/15/97 <br /> Analyzed Date: 7/15/97 7/15/97 7/15/97 7/15/97 7/15/97 <br /> Instrument LD #' GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked. 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 12 mg/Kg <br /> Result 016 016 016 048 1 1 <br /> MS % Recovery. 80 80 60 80 92 <br /> Dup Result: 0 17 0 17 018 054 1 2 <br /> MSO % Recov : e5 as 90 so 100 <br /> RPD: 61 61 12 12 8 7 <br /> RPD Limit: 0-25 0-25 0-25 0-25 0-25 <br /> -- LCS-# �BLK071597----- BLK071597 --BLK071597 - BLK071597- ---BLK071597 <br /> - -- - Prepared Date- ___7/15/97_ ___ _ __ 7/15/97 T 7/i5/97� T-- 7/15/97 T- -- - 7/15/97 - --- <br /> Analyzed Date 7/15/97 7/15/97 7/15/97 7/15/97 7/15/97 <br /> Instrument I D #: GCHP7 GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc. Spiked. 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 12 mg/Kg <br /> LCS Result. 0 18 0 18 Ole 055 13 <br /> LCS % Recov : 90 90 90 92 108 <br /> 60-140 60-140 60-140 60.140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> - Please Note -- —- <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUCIIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to mate <br /> interference,the LCS recovery Is to be used to validate the batch <br /> eeGrecgiory <br /> Project Manaqer **MS=Matnx Spike,MSD=MS Duplicate,RPD=Relative%Difference 9707310 EEE <2> <br />