Laserfiche WebLink
Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> 404 N eget 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(9t6)92t 0100 <br /> Brown and Caldwell Client Project ID Arco #2093, Tracy <br /> 3480 Buskirk Avenue Matrix Liquid <br /> Pleasant Hill, CA 94523 <br /> Attention Steve Misner ❑C Sample Group 7111386-392 Reported Dec 8, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC120297 GC120297 GC120297 GC120297 <br /> 802004A 802004A 802004A 602004A <br /> Analy Method EPA 8020 EPA8020 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 # 7111487 7111487 7111487 7111487 <br /> Sample Cone N o ND N D N D <br /> Prepared Date 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Analyzed Date 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 <br /> Cone Spiked 20 pg/L 20ug/L 20 pg/L 60 jug/L <br /> Result 20 20 20 62 <br /> MS % Recovery 100 100 100 103 <br /> Dup Result 21 21 20 62 <br /> MSD % Recov- 105 105 100 103 <br /> RPD 49 49 00 00 <br /> RPD Limit 0-20 0.20 0-20 0-20 <br /> LCS # 4LCS120297 4LCS120297 4LCS120297 4LCS120297 <br /> Prepared Date 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Analyzed Date 12/2/97 12/2/97 12/2/97 12/2/97 <br /> Instrument I D # HP-4 HP-4 HP-4 HP-4 <br /> Cone Spiked 20ug/L 20yg/L 20ug/L 60pg/L <br /> LCS Result 20 20 19 61 <br /> LCS % Recov 100 100 95 102 <br /> LCS 70-130 70-130 70-130 70-130 <br /> Control Limits <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <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 /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Interference,the LCS recoveryIs to be used to validate the batch <br /> Melt sa A Brewer **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> Client Services Representative <br /> 7111386 BRO <6> <br /> fid+ <br />