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Sequoia <br />WWW Analytical <br />680 ChesaPCaKe Dave Pedwood City CA 94063 1415; 364 9600 FAX 14151 3es 9233 <br />1900 Bates Avenue Suite L Concord CA Q4520 f5101 686 9600 FAX (5 101 6R6 96R9 <br />819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916) 921 0100 <br />Groundwater Technology Client Project ID Chevron #9-2033, Stockton, CA <br />1401 Halyard Drive, Suite 140 Matrix Soil <br />West Sacramento, CA 95691 <br />Attention Jason Fedota OC Sample Goup 5031072-1109 Reported Apr 4, 1995, <br />QUALITY CONTROL DATA REPORT <br />Ethyl - <br />Benzene Toluene Benzene <br />Diesel <br />Method: <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8015M <br />Analyst: <br />C Chapman <br />C Chapman <br />C Chapman <br />C Chapman <br />C Lee <br />Concentration <br />Spiked: <br />0 20 mg/kg <br />0 20 mg/kg <br />0 20 mg/kg <br />0 60 mg/kg <br />7 5 mg/kg <br />LCS Batch#: <br />LCS03289S <br />LCS032895 <br />LCSD32895 <br />LCS032895 <br />LCS032995 <br />Date Prepared: <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/29/95 <br />Date Analyzed: <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/30/95 <br />Instrument I.D.#: <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-3B <br />LCS % <br />Recovery. <br />100 <br />95 <br />100 <br />98 <br />103 <br />Control Limits- <br />75-125 <br />75 125 <br />75.125 <br />75-125 <br />60-130 <br />i + x ` v. � ,.. ,. , , , , <br />^ .. ` , � , <br />n s.n ,r ., + <br />,� ., '. {' {., v <br />".., . s ,. ,;, h z • y r , cr^o1 ..y5 + „Y" 4r,,.. ,., . nx t } <br />w, -m ,ori a +.w 4. WnG v...nnsvms+m.+nv v. nn atxv <br />MS/MSD <br />Batch #. <br />5030849 <br />5030849 <br />5030849 <br />5030849 <br />5030985 <br />Date Prepared: <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/29/95 <br />Date Analyzed- <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/28/95 <br />3/30/95 <br />Instrument 1.D.#. <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-3B <br />Matrix Spike <br />% Recovery. <br />100 <br />100 <br />100 <br />100 <br />a9 <br />Matrix Spike <br />Duplicate % <br />Recovery. <br />95 <br />95 <br />95 <br />95 <br />104 <br />Relative % <br />Difference. <br />51 <br />51 <br />51 <br />51 <br />16 <br />SEQUOIA ANALYTICAL <br />CSG L� <br />Linda C Schneider <br />Project Manager <br />Please Note <br />The LCS is a control sample of known interferent free matrix that 1s analyzed using the same reagents, <br />preparation and analytical methods employed for the samples The LCS % recovery data is used for <br />validation of sample batch results Due to matrix effects the CC limits for MS/MSDs are advisory only <br />and are not used to accept or reject batch results <br />r4� <br />5031072 G RW < 15 > <br />