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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 1 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 Sequoia 680 Chesapeake Drive Redwood City A 4598 (650)364-9600 FAX(650)364-9233 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 819 N Striker <br /> At Lane Walnut Creek CA 94548 (925)988-9600 FAX(925)988-9673 <br /> • 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 Analytical <br /> �nalyti +a 1 819 5mker Avenue Suite t Sacramento CA 95834 (916)921-9600 FAX(916)92[-0100 <br /> A � ` 1..46 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> ATC Associates, Inc Client Project ID Gardner Property 62586 0001 04 <br /> ATC Associates, Inc Client Proj ID Gardner Property 82586 000104 Received C 1260 Graphics Drive Matrix Liquid <br /> 1260 Graphics Drive Modesto, CA 95351-1502 <br /> " Modesto, CA 95351-1502 Lab Proj ID 9807070 Reported C Attention Tom Lutterman Work Order# 9807070-03 Reported Jul 17, 1998 <br /> A_ttention Tom Lutterman <br /> QUALITY CONTROL DATA REPORT <br /> LABORATORY NARRATIVE Analyte: Benzene Toluene Ethyl xylenes Gas <br /> Benzene <br /> In order to properly interpre 4hls report, it must be reproduced in its ent OC Batch# GC071598802005A GCO71598802005A GC071598802005A GC071598802005A GC071598802005A <br /> report contains a total ofpages including the laboratory narrative, Analy. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA8015M <br /> results, quality control, and related documents as required (cover page, CO( <br /> etc ) prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> OXY Note Analyst C Westwater C Westwater C Westwater C Westwater C Westwater <br /> Sample 9807070-03 (MW-4) was diluted 7 1 times due to high hydrocarbons MS/MSD# 8070246 8070246 8070246 8070246 8070246 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 7/15/98 7/15/98 7/15/98 7/15/98 7/15/98 <br /> Analyzed Date 7/15/98 7/18/98 7/15/98 7/15/98 7/15/98 <br /> Instrument I D # HP5 HP5 HP5 HP5 HP5 <br /> Conc Spiked 20Etg/L 20Ng/L 20ftg/L 60pg/L 250ug/L <br /> Result 19 19 19 59 230 <br /> MS % Recovery 95 95 95 98 92 <br /> Dup Result. 18 18 18 55 260 <br /> MSD %Recov 90 90 90 92 104 <br /> RPD" 54 54 54 70 122 <br /> RPD Limit. 0-20 0-20 0-20 0-20 0-50 <br /> LCS# LCS071598 LCS071598 LCS071598 LCS071598 LCS071598 <br /> Prepared Date 7/15/98 7/15/98 7/15/98 7/15/98 7/15/98 <br /> Analyzed Date 7/15/98 7/15/98 7/15/98 7/15/98 7/15/98 <br /> Instrument I D # HP5 HP5 HP5 HP5 HP5 <br /> Conc Spiked 20ug/L 20ug/L 20pg/L 60 ftg/L 250 ug/L <br /> LCS Result 17 17 17 55 290 <br /> LCS % Recov 85 85 85 92 116 <br /> 60-140 60-140 60-140 60-140 <br /> LCS 70-130 70-130 70-130 70-130 60-140 <br /> Control Limits <br /> Please Nate <br /> SEQUOIA ANALYTICAL The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL , t� Elap#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 recovery is to be used to validate the batch <br /> an Kim <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 980707OW <2> <br /> Project Manager <br />