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/ SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 e Sacramento, CA 95834 <br /> (916) 921-9600 a FAX (9167 921-0100 <br /> ,2rco 2130-93-2, Stockton <br /> f.�h,.v.,.n <br /> W{t lef3 client Project I D AC}i1a4,,..�z" <br /> 13164 Gold Camp Dr. Suite 200 Math Soil <br /> "Rancho Cordova, CA 95670 <br /> Attention Jay Johnson OC Sample Group 311-0355 Reported Nov 11, 1993 <br /> Wim„ p� � <br /> .ar`..'f'.v' mwf%i.:ra"m`` rr9.wa.h .,. ..r r o,,, r ++ +., n '�<2 ,. n,.Yr e.Y.�. ++.`,2+N •tv � A�r rr�+»� <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE e=thyl Total <br /> Benzene Toluene benzene X enes Lead <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 6010 <br /> Analyst: CLC CLC CLC CLC a Foster <br /> Concentration <br /> Spiked: 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg 12 5 mg/kg <br /> LCS Batch#: LCS111093 LCS111093 LCS111093 LCS111093 LCS111193 <br /> Date Prepared: 11/10/93 11/10/93 11/10/93 11/10/93 11/11/93 <br /> Date Analyzed 11/10/93 11/10/93 11/10/93 11/10/93 11/11/93 <br /> Instrument I.D.#' HP-1 HP-1 HP-1 HP-1 PE-40 <br /> LCS% <br /> Recovery: 100 90 100 as 98 <br /> Control Limits: 80-120 80-120 80-120 80.120 80-120 <br /> +xv se v4•,.4r��'n w.F.. v Y[+tr •r+'+"r{r�•n rnv.. v} '. ,. r v+ ` w v � r + t+.r � v +,. + • . H .. .rY v <br /> MS/MSD <br /> Batch#: 3101087 3101087 3101087 3101087 3110357 <br /> Date Prepared: 11/10/93 11/10/93 11/10/93 11/10/93 11/11/93 <br /> Date Analyzed 11/10/93 11/10/93 11/10/93 11/10/93 11/11/93 <br /> Instrument 1.04- HP-1 HP-1 HP-1 HP-1 PE-40 <br /> Matrix Spike <br /> %Recovery* 90 90 90 85 88 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery, 90 as 90 83 97 <br /> Relative% <br /> Difference: 00 57 00 24 9 7 <br /> Please Note <br /> The LCS is a control sample of known interferent tree matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL 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 OC kmrts for MS/MSD's are advisory only <br /> / .✓� /, and are not used to acceot or reject batch results <br /> Linda C Schne er <br /> Protect Manager 3110355 RES <a> <br />