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the 15) 364 9233 <br /> 404 h1 Wiget Lane Walnut Creek CA 94598 (5 10) 988 9600 FAX(5 10) 988 967 3 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 OIoO <br /> (Delta Environmental Consultants Client Project ID Unocal #5886, 2701 W March Lane, Stockton <br /> 3300 Delta Drive Ste 100 Matrix Liquid <br /> Rancho Cordova CA 95670 <br /> ' Attention Eric Holm OC Sample Group 5091736-40 Reported Sep 28 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Anaiyte Benzene Toluene E'hyi Xylenes <br /> Benzene <br /> CC Batch# GCO92695 GCO92695 GC092695 GCO92695 <br /> 802002A 802002A 802002A 802002A <br /> Analy Method E°A 8020 EPA 8020 E°A 8020 EPA 8020 <br /> ' Prep Method E°A 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst K Nlll K Nil K Nlii K Nlll <br /> MS/MSD # 5091348 5091348 5091348 5091348 <br /> Sample Conc N 0 N d N D N D <br /> ' Prepared Date 9/26/95 9/26/95 9/25/95 9/26/95 <br /> Analyzed Date 9/26/95 9/26/95 9/26/95 9/26/95 <br /> Instrument 10 # HP 2 HP 2 HP 2 HP 2 <br /> Conc Spiked 20 pg/L 20)ug/L 20 pg/L 60 ug/L <br /> Result 22 22 23 67 <br /> MS % Recovery 110 110 115 112 <br /> I ' cup Result 22 22 22 67 <br /> MSD % Recov 110 110 110 112 <br /> RPD 00 00 44 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 <br /> I <br /> ' LCS # 1 LCS092695 1 LCS092695 1 <br /> LCS092695 1 LC5092695 <br /> Prepared Date 9/25195 9/26/95 9/26/95 9/26/95 <br /> Analyzed Date 9/26/95 9/26/95 9/26/95 9/26/95 <br /> Instrument I D # HP 2 HP 2 HP 2 HP 2 <br /> Conc Spiked 20 jug/L 20Ng/L 20pg/L 60pg/L <br /> ' LCS Result 23 23 23 71 <br /> LCS % Recov 117 114 116 118 <br /> I <br /> LCS <br /> Control Limits 71 133 72 128 72-130 71 120 <br /> ' Please Note <br /> The LCS is a control sample of known Interterent-free matrix that 1s analyzed using the Same reacents <br /> SEQUOIA ANALYTICAL #1271 Please Note <br /> h- r f ry fortified with known quantities OT specific comoounas and suialec;ea to the entire analytical orocecure it <br /> the recovery of analytes -rpm The matrix smke does not tail within specmea control limits oue o matrix <br /> ty � Intererence he LCS recovery is.0 4e usea*o vailoate the catch <br /> Kenneth L Wimer "'MS=Matrix Spike VISD=MS Duplicate RPO=Relative 'o Difference <br /> Prole % Manager <br /> 5091738 CCD -4> <br /> ' ~c <br />