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Sequoia 680 Chesapeake Dnve Redwood Cny Ca 94063 (4 15) (4151 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (5 10) 98S 9600 FAX(5 10)998 9673 <br /> wjr' Analytical 819 Sinker Avenue Swte 3 Sacramento CA 95834 (916) 971 9600 FAX(916)921 0100 <br /> Delta Environmental Consultants Client Project ID Unocal 05886 2701 W March Lane, Stockton <br /> 3300 Delta Drive, Ste 100 Matrix Solid <br /> ' Rancno Cordova CA 95670 <br /> Attention Eric Holm QC Sample Group 5091736-40 Reported Sep 28, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> Analyte Benzene Toluene Ethyl Xylenes Ciesel <br /> ' Benzene <br /> QC Batch# SP092595 SP092595 SP092595 SP0925GS SP092595 <br /> 8020EXA 8020EXA 8020EXA 8020EXA 8015ECA <br /> Anaiy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> ' Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 3550 <br /> Analyst K Niil K NIII K Nil] K Nil J Dinsay <br /> MS/MSD # 5091580 5091580 5091580 5091580 5091740 <br /> ' Sample Conc . N D N D N 0 N D N D <br /> Prepared Date 9/25/95 9/25/95 9/25/95 9/25/95 9/25/95 <br /> Analyzed Date 9/25/95 9/25/95 9/25/95 9/25/95 9/26/95 <br /> Instrument I D # HP-4 HP 4 HP-4 HP 4 GCHP-3A <br /> ' Cone Spiked 0 40 mg/kg 040 mg/kg 0 40 mg/kg 1 2 mg/kg 10 mg/kg <br /> Result 041 042 043 13 11 <br /> ' MS % Recovery 103 105 108 107 110 <br /> Dup Result 041 042 043 13 11 <br /> MSD % Recov 103 105 108 108 110 <br /> RPD 00 00 00 078 00 <br /> RPD Limit 0-20 0-20 0-20 0-20 0-20 <br /> LCS # 2LC3092595 2LCS092595 2LCS092595 2LCS092595 SLK092695 <br /> Prepared Date 9/25/95 9/25/95 9/25/95 9/25/95 9/25/95 <br /> Analyzed Date 9/25/95 9/25/95 9/25/95 9/25/95 9/26/95 <br /> Instrument I D.# HP 4 HP-4 11P-4 HP 4 GCHP 3A <br /> ' Conc. Spiked- 20 ug/L 20 ug/l- 20 Ng/L 60 Ng/L 10 mg/kg <br /> LCS Result. 20 20 20 60 11 <br /> ' LCS % Recov 99 102 101 101 110 <br /> LCS <br /> ' Control Limits 55-145 47-149 47-155 56-140 38-122 <br /> ' Please Note <br /> The LCS Is a control sample os known interrerem free matrix that is analyzed using the same reagents <br /> SEQUOIA ANALYTICAL, #1271 preparation ana analvncai methods emAioyea for the samples The matrix solke is an aiieuot of samoie <br /> fortified with known quantities or soecmc compounas and suolectea to the entire analytical orcceaure If <br /> the recovery of analvtes from the matrix soike aoes�iot fail within soecirted cortr01 limits cue o matrix <br /> interterence the LCS recovery is,o 4e useq to vancate,ne batcn <br /> Kenn tth L Wilmer �'MS=Arlatnx Spike MSD=MS Duoucate API)mReiavve Difference <br /> Prolect�Manager <br /> 5091736 DCO _3> <br />