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hesaptake Drive Redwood City,CA 94063 364-9600 FAY,�415).364-9233 <br /> FAX(510)988-9673 <br /> Sequoia N.Wiget Lane Walnut Creek,CA 94598 '"iie) 989-9600 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921.9600 FAX(916)921-0100 <br /> ,,s <br /> EMCON Associates IQ: Arco 2168, Stockton <br /> Client Project. <br /> 1433 N. Market Blvd. Matrix: Soil <br /> Sacramento, CA 95834 <br /> Attention: Claudio Avila QC sample Group 6020359-67 Reported: Feb 21, 1996"::: <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene xylenes <br /> Method: EPA 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/k d 0.20 mg/kg 0.60 mg/kg <br /> LCS Batch#: LCS021396 LCS021396 LCS021396 LCS021396 <br /> Date Prepared: 02/13/96 02/13/96 02/13/96 02/13/96 <br /> Date Analyzed: 02/13/96 02/13/96 1 02/13/96 02/13/96 <br /> Instrument I.D.#: GCHP_1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> Recovery: 93 94 95 95 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch #: BS021396B BS021396B BS021396B BS021396B <br /> Date Prepared: 02/13/96 02/13/96 02/13/96 02/13/96 <br /> Date Analyzed: 02/13/96 02/13/96 02/13/96 02/13/96 <br /> Instrument I.D.#: GCHP-1 GGHPA GCHP-1 GCHP-1 <br /> Matrix Spike <br /> %Recovery: 89 89 89 90 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 92 94 94 94 <br /> Relative % <br /> Difference: 3.3 5.5 5.5 4.3 <br /> SEQUOIA ANALYTICAL Please Note: <br /> f The LCS is a control sample of known,interferent free matrix that is 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/M$O's are advisory only <br /> Janet H' clan and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Labor—afo—ry -i-: 6020359.EMC <5> <br /> 'T <br />