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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> ® 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(91 G)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792 1865 FAX(707) 792-0342 <br /> 1551 Industnal Road San Carlos CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> *Sequoia Analytical Client Project ID L905529-Blaine Tech Services, Inc <br /> 1551 Industrial Blvd Matrix Liquid <br /> San Carlos, CA 94070 <br /> Attention Mike Gregory QC Sample Group 9052409-412 Reported Jun 16, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Acenaphthene 4-Nitrophenol 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> QC Batch# SP060199 SP060199 SP060199 SP060199 SP060199 <br /> 8270EXA 8270EXA 8270EXA 8270EXA 8270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 6270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst L Diaz L Diaz L Diaz L Diaz L Diaz <br /> MS/MSD # BLK060199 BLK050199 BLK060199 BLK060199 BLK060199 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 6/1/99 6/1/99 6/1/99 6/1/99 6/1/99 <br /> Analyzed Date 6/3/99 6/3/99 6/3/99 6/3/99 6/3/99 <br /> Instrument I D # GC/MS-1 GC/MS-1 GC/MS-1 GC/MS-1 GC/MS-1 <br /> Conc Spiked 100Yg/L 150yg/L 100Etg/L 150 ftg/L 100yg/L <br /> Result \ 70 42 73 110 81 <br /> MS % Recovery 70 28 73 73 81 <br /> Dup Result 72 54 78 120 86 <br /> MSD % Recov 72 36 78 BO 86 <br /> RPD 2B 25 66 87 60 <br /> RPD Limit 030 0-30 0-30 0-30 030 <br /> LCS# - - - - - <br /> Prepared Date - - <br /> Analyzed Date <br /> Instrument I D# <br /> Conc Spiked - <br /> LCS Result <br /> LCS % Recov - - - _ _ <br /> LCS 46-118 10-80 24-96 9-103 26-127 <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 /> preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> SEQUOIA AN L, #1271 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 matrix <br /> d�4& I interference,the LCS recovery is to be used to validate the batch <br /> *" <br /> Charlie Westwater MS=Matrix Spike, MSD=MS Duplicate, RPD Relative %Difference <br /> Project Manager Page 2 of 2 <br /> 9052409 SSS <15 7 <br />