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�f r, 4� Sequoia - o ChcsancaKc Leri c -Cwooq�-1 l 4-)03 1, n4 9600 "-%X(415 304 9233 <br /> ' 4) bar-s tenue ]J - )ncnrq % -. 20 '0 c90 qr()n =aX (510 686 9689 <br /> naivticai )" -tKCr -ve^tic _ Cramer c0 21 701.0 =aX{916,92 0100 <br /> Brawn Caldwell Client Project ID -rco 434-94-5 L-oal <br /> 9616 Micron Avenue Suite 600 latrlx sir <br /> Sacramento CA 95827 <br /> Attention Mlndv Wright CC Sample GrouA 4070249-251 255 256 Reported Jul 19 1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 ESA 8020 CDA 8020 <br /> Analyst J Minkel J Minkel J Minkel J Minkel <br /> Concentration <br /> Spiked .0 ug/l- 10 ug/L D ugrL .J ug/L <br /> LCS Batch# NiA N/A N'A N/A <br /> Date Prepared N/A N/A N/A N/A <br /> ,Date Analyzed N/A N/A N/A N/A <br /> Instrument I ❑ # N/A N/A N/A N/A <br /> . LCS % <br /> Recovery N/A N/A N/A N/A <br /> Control Limits. 71-133 72 128 72 130 71-120 <br /> MS/MSD <br /> Batch# 9407066-015 9407066-015 9407066-015 9407066-015 <br /> Date Prepared N/A N/A N/A N/A <br /> Date Analyzed* 7/7/94 7/7/94 7/7/94 7/7/94 <br /> Instrument I D # GCHP 20 GCHP-20 GCHP 20 GCHP 20 <br /> Matrix Spike <br /> % Recovery 92 92 92 90 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 96 97 97 97 <br /> Relative % <br /> Difference 43 53 53 75 <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 a recovery data is used for <br /> validation of sample batch results Oue to matrix eftecis the OC limits for MS/MSO s are advisory only <br /> Craig C e and are not used to accept or resect batch results <br /> Project Manager <br /> 4070247 BRS <4> <br />