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66U Uie-;apeake Drive Redwood ity 41 1 164 9600 FAX(415) n64 9233 <br /> Analytical "04 N Wtget Lane Walnut Creek CA 94598 (510) 983 9600 FAX(510) 938 9673 <br /> ' 319 Striker Avenue Suite 8 Sacramento CA 95834 (316) 921 960b FAX(9t6 921 0100 <br /> Delta Environmental Consultants Client Project ID Unocal x#5886 <br /> 3164 Gold Camp Dr, Suite 200 Matrix Soil <br /> Rancho Cordova, CA 95670 <br /> ' Attention Eric Halm CC Sample Group 5091247-1256 Reported Oct 5 1995 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> ' Method EDA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst V Owens V Owens V Owens V Owens <br /> Concentration <br /> ' Spiked 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> LCS Batch# LCS092895 LCS092895 LCS092895 LCS092895 <br /> ' Date Prepared 9/28/95 9/28/95 9/28/95 9/28/95 <br /> Date Analyzed 9/28/95 9/28/95 9/28/95 9/23/95 <br /> Instrument I D # GCHP 1 GCHP 1 GCHP-1 GCHP 1 <br /> ' LCS % <br /> Recovery 98 98 98 97 <br /> Control Limits* 75-125 75-125 75-125 75-125 <br /> ' MS/MSD <br /> Bated # 5091432 5091432 5091432 5091432 <br /> ' Date Prepared 9/28/95 9/28/95 9/28/95 9/28/95 <br /> Date Analyzed 9/28/95 9/28/95 9/28/95 9/28/95 <br /> Instrument 10.# GCHP-1 GCHP-1 GCHP 1 GCHP 1 <br /> ' Matrix Spike <br /> % Recovery 84 85 84 86 <br /> ' Matrix Spike <br /> Duphcate % <br /> Recovery, 97 98 96 98 <br /> ' Relative % <br /> Difference 14 14 15 13 <br /> ' SEQUOIA ANALYTICAL Please Note <br /> / <br /> The LCS is a control samate at known rnterterent tree matrix that Is analyzea usino the sar—e reacents <br /> preoaratlon and analytical methods emoloyed for the sametes The LCS'6 recovery Cata is sec cr <br /> validation of samole batch results Cue to matrix erfects the CC limits.or MS,MSOs are as iso'v a 1v <br /> Linda C Schneider and are not used to accent or reject batch results <br /> Project Manager <br /> X091247�L' �> <br />