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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creck CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)92t 0100 <br /> �r r err,.„ <br /> Delta Environmental Consultants rx Client I'rolect ID Exxan'7-3708,VD093-809 <br /> 3164 Gold Camp Drive, #200 Matrix Solid <br /> ,Rancho Cordova, CA 95670 <br /> Attention Keonl Almeida Work Order # 9705525 -01, 02 Reported May 19, 1997 <br /> r ` , t r , x.,¢l�,:.h u. ....,j w:rr;r,., v,. .,t• r,..rY.co vf.. o rf'Y.'ir .,Y.`a;,,. .r sir-...wr..,,,.,,,.,......,, r..,. <., r v r r <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC051597BTEE)<A GCO51597STECEXA GCO51597STEXECA GC051597BTECECA GCO51597STECEXA <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 M <br /> Prep. Method' EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: A.Porter A.Porter A.Porter A.Porter k Porter <br /> MS/MSO #' 970530617 970530617 970530617 970530617 970530617 <br /> Sample Conc N D N 0 N o N D N D <br /> Prepared Date: 5/15/97 5/15/97 5/15/97 5/15/97 5/15/97 <br /> Analyzed Date. 5/15/97 5/15/97 5/15/97 5/15/97 5/15/97 <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 /> Result: 019 0 19 020 059 1 2 <br /> MS % Recovery* 95 95 100 98 100 <br /> D up Result, 026 026 0 27 0 81 1 7 <br /> MSD % Recov .. 130 130 135 135 142 <br /> RPD. 31 31 30 31 34 <br /> RPD Limit: 0-25 0.25 0-25 0-25 0-25 <br /> a . ,iC rCm M�J rrm'A .xr".r w+r.+, +�+n rr}�nvE"ary i r ifK r.ra •r`{ti+W�yr v r x n w.+f rm srrmwr rrvrr+r-CCvYaL..?'v.ter .1 x`. fi✓r.. r r, nr r .r, <br /> LCS # SLK051597 SLK051597 BLK051597 BLK051597 BLK051597 <br /> Prepared Date: 5/15/97 5/15/97 5/15/97 5/15/97 5/15/97 <br /> Analyzed Date: 5/15/97 5/15/97 5/15/97 5/15/97 5/15/97 <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 1 2 mg/Kg <br /> LCS Result: 017 018 018 054 1 1 <br /> LCS % Recov .. 85 90 90 90 92 <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 /> Pease Nate <br /> The LCS Is a control sample of known Interferent-free matrix that Is analyzed using the same reagents <br /> 10 SEQUOIA ANALYTICAL preparaton and anaiytical 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 ana"cai procedure if <br /> the recovery of analytes from the matrix spike does riot fail within specified control limits due to matrix <br /> 14 Interference,the LCS recovery 1s to be used to validate the batch <br /> Gregory <br /> Project Manager *"'MS=Matnx Spike,MSO=MS Duplicate,RPO=Reiauve a Difference 9705525 DLT <1> <br />