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404 N Wiget Lane Walnut Creel, CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite 3 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Delta Environmental Consultants Client Project ID Unocal #5886 <br /> 3164 Gold Camp Dr, Suite 200 Matrix Sad <br /> Rancho Cordova, CA 95670 <br /> ' Attention Enc Holm OC Sample Group 5091247-1256 Reported Oct 5, 1995 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Ethyl- <br /> Benzene Toiuene Benzene Xylenes Diesel <br /> ' Method. EPA 8020 EPA 3020 EPA 8020 EPA 8020 EPA 801 SM <br /> Analyst. V Owens V Owens V Owens V Owens C Lee <br /> Concentration <br /> ' Spiked. 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg 7 5 mg/kg <br /> LCS Hatch# LCS092695 LCS092695 LCS092695 LCS092695 LCS092695 <br /> ' Date Prepared 9/26/95 9/26/85 9/26/95 9/26/95 9/26/95 <br /> Date Analyzed 9/26/95 9/26/95 9/26/95 9/26/95 9/29/95 <br /> Instrument I D # GCHP-1 GCHP 1 GCHP 1 GCHP-1 GCHP 36 <br /> ' LCS % <br /> Recovery 99 99 100 99 107 <br /> Control Limits 75-125 75 125 75-125 75-125 60-130 <br /> ' MS/MSD <br /> Batch #' 5090968 5090958 5090968 5090968 5091139 <br /> ' Date Prepared: 9/25/95 9/26195 9/26/95 9/26/95 9/26/95 <br /> Date Analyzed 9/25/95 9/25/95 9/26/95 9/26/95 9/29/95 <br /> Instrument I D #• GCHP 1 GCHP 1 GCHP-1 GCHP 1 GCHP-38 <br /> Matrix Spike <br /> % Recovery. 92 94 93 93 <br /> ' Matrix Sp:ice <br /> Duplicate <br /> Recovery' 96 96 96 94 ` <br /> ' Relative % x <br /> Difference 43 21 32 11 <br /> SE{]UOIA ANALYTICAL Please vote <br /> The LCS�s a control samoke of known interferent free matrix that s analyzed using he s <br /> / ame reagens { <br /> preparation ana analytical methoas employed for the samples The LCS ecnvery data s uses or <br /> valtdatton or samole batcn results Due to matrix erfec s he OC emits.cr MS/MSD s are aav�sory enly <br /> Linda C Schneider and are not used to accevi or resect Batch results 'Matrix interrerence <br /> Project Manager <br /> 5091247 DL' �5. <br /> -r- <br />