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9SequA <br /> oia Chesapeake Drive Redwood City C 3 (650)364 9600 FAX(650) 364 9233 •' <br /> N Wiget Lane Walnut Creek C8 (925)988 9600 FAX(925)988-ge)73 <br /> 819 Straker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical <br /> r� `T+y �i�� 1455 McDowell Blvd North Ste D - Petaluma CA 94954- (707) 792 1865 FAX(707) 792-0342 <br /> I" ria Jy i 1551 Industrial Road Sin Carlos CA 94070-41 1 1 (650) 232-9600 FAX((550) 232 9612 <br /> Secor Client Protect ID Arco # 434, Lod( . <br /> 9912 Business Park Dr, Ste 100 Matrix Solid <br /> Sacramento, CA 95827 <br /> Attention Rusty Benkosky QC Sample Group 9061819-824 Reported —.Jun-28,-1999 <br /> = <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> = OC Batch# SP062399 SP062399 SP062399 SP062399 - <br /> 8020EXA 8020EXA 8020EXA 8020EXA <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst D Newcomb D Newcomb D Newcomb D Newcomb <br /> MS/MSD # 9061819 9061819 9061819 9061819 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 6/23/99 6/23/99 6/23/99 6/23/99 <br /> Analyzed Date 6/23/99 6/23/99 6/23/99 6/23/99 <br /> Instrument I D # HP-4 HP-4 HP 4 HP-4 <br /> Cone Spiked 0 80 mg/Kg 0 80 mg/Kg 0 80 mg/Kg 2 4 mg/Kg <br /> Result 080 067 070 23 <br /> MS %Recovery 100 84 88 96 <br /> Dup Result 078 066 069 23 <br /> MSD %Recov 98 83 86 96 <br /> RPD 25 15 14 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> LCS# 4LCS062499 4LCS062499 4LCS062499 4LCS062499 <br /> Prepared Date 6/24/99 6/24/99 6/24/99 6/24/99 <br /> Analyzed Date - 6/24/99 6/24/99 6/24/99 6/24/99 <br /> Instrument I D # HP-4 HP 4 HP-4 HP 4 <br /> Cone Spiked 0 80 mg/Kg 0 80 mg/Kg 0 80 mg/Kg 2 4 mg/Kg <br /> LCS Result 077 065 068 23 <br /> LCS % Recov 76 79 84 86 <br /> LCS 50-150 50-150 50150 50150 <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 /> SEQUOIA ANALYTICAL, #1271 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 /> AIMP <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recove rs to be used to validate the batcht Manager <br /> r '-MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Protect Manager <br /> 9061819 SSS <4> <br />