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'.4 Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 404 N. Wigct Lane Walnut Creek,CA 94598 (5 10) 988-96()0 FAX(510)988-9673 <br /> 8 19 Striker Avenue,Suite 8 Sacr�rnerao, CA 95834 (916) 921-9600 <br /> Iwo Analytical FAX(916)921-0100 <br /> U'Pacific En"viron'"mienial'Gi...o.........1....... <br /> Group, nc. Client Pr" e c t I D. Arco 2093, A <br /> 11315 Sunrise Gold Circle, #M Matrix: Water <br /> Rancho Cordova, CA 95742 <br /> Attention: Greg Barclay <br /> 21, 1996:.'. <br /> OC Sample G roup 6020578-0590 <br /> Reported: Feb <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTEEthyl- <br /> Benzene <br /> Toluene Benzene Xylenes <br /> Ev <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: V.Owens V.Owens V.Owens V.Owens <br /> Concentration <br /> Spiked: 10 ug/L 10ug/L 10 ug/L 36 ug/L <br /> LCS B:atch#: LCS021796 LCS021796 LCS021796 j LCS021796 <br /> Date Prepared: 02/17/96 02/17/96 02/17/96 02/17/96 <br /> Date Analyzed: 02/17/96 02/17/96 02/17/96 02/17/96 <br /> Instrument I.D.#: GCHP-J GCHP-1 GCHP-1 13GCHP-1 <br /> LCS % <br /> Recovery: 97 100 100 '101 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> ........... <br /> ................................ <br /> ...%X <br /> . . ........ . .00� <br /> ... .... . <br /> Xff .......... <br /> ............ <br /> ............................................. ....... <br /> MS/MSD <br /> R <br /> Batch#: BS021796 SS021796 BS021796 1! <br /> BS021796 <br /> Date Prepared: <br /> 02/17/96 02/17/96 02/17/96 0 02/17/96 <br /> Date Analyzed: 02/17/96 02/17/96 02/17/96 :1 02/17/96 FI <br /> Instrument I.D.#: GCHP_1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> %Recovery: 103 104 104 104 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 100 99 98 98 <br /> Relative% <br /> Difference: 2.9 4.9 5.9 5.9 <br /> SEQUOIA ANALYTICAL Please Note: <br /> 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/MSD's are advisory only <br /> -1 <br /> Jane�4dan and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Labcratory <br /> 6020578.PES <6> <br />