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' Sequoia 680 Chesapeake D., Redwood City CA 94063 (415) 364-9600 FAX(415) 364-92,33 <br /> 1900 Bates Avenue Suite L Concord CA 94520 (510) 686 9600 FAX(510) 686 %89 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> ,. ,...t rv.l tiYx i ,.., ,..++s�r r+�srwt^^^.: .,y'ti v rtiz'�'a+s,Y`4-: L %,fi •'..r,x b...�.°ekr r v c r %W}�r,`ir irr .',ra. k..+a +.J...{.,':w.:i,.Ati r <br /> i'Mittelhauser Corporation Client Project lD 2168 01-001, Unocal/Tracy <br /> 7901 Stoneridge Drive, Suite 123 Matrix Uauid 7 <br />' Pleasanton CA 94588 t A4 <br /> ,Attention R Marks/R Papier Work Order# 9502243-09 Reported Feb 9, 1995 <br /> }'3'.S; `� ;�;.'}rim<` r. �.,�r•.,..,w..s r. t tfr' .. rr,..+r,?,ru�+ rrr rfiry t` <br /> ' QUALITY CONTROL DATA REPORT <br /> Analyte: 1,1-Dichloroethene Trichloroethene Benzene Toluene Chloro- <br /> benzene <br /> QC Batch#: MSo207958240Fm MS0207958240F3A MS0207958240173A MS0207958240F3A MS0207958240F3A <br /> Analy Method: EPA 8240 EPA 8240 EPA 8240 EPA 8240 EPA 8240 <br /> Prep Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: S Hoffmann S Hoffmann S Hoffmann S Hoffmann S Hoffmann <br /> M S/MSD#: 950110101 95011010/ 950110101 950110101 950110101 <br /> ' Sample Conc.: N D NO NO N D NO <br /> Prepared Date: 2/7/95 2/7/95 2/7/95 2/7/95 2/7/95 <br /> Analyzed Date: 2/7/95 2/7/95 2/7/95 2/7/95 2/7/95 <br /> Instrument I.D.#: F3 F3 F3 F3 F3 <br /> ' Conc Spiked: 5oug/L 50ug/L 50ug/L 50Mg/L 50pg/L <br /> Result: 54 53 54 53 53 <br /> MS % Recovery: 108 106 108 106 106 <br /> Dup. Result: 51 51 52 51 51 <br /> MSD % Recov.: 102 102 104 102 102 <br /> ' RPD: 57 38 38 38 38 <br /> RPD Limit: 0150 0.50 0-50 0-50 a-so <br /> r n ; r n{��r.. v i MYNA L`r rW r..�rn 1 +r n..r 4 ov,� r�"i v+ ,r^•+,...a �.,v?ir,y.,.,. + r ..+`vw^^.�":AC.�r`i rcvt�S�Fn,'{R4` v r,rrj{a+,st','v...,rvf„ <br /> LCS <br /> Prepared Date: - - - <br /> Analyzed Date: - - <br /> instrument I D.#: - - - - <br /> ' Conc Spiked: - - - <br /> LCS Result: - - - - - <br /> ' LCS % Recov.: <br /> ' LCS OL-234 71-157 37-151 47-150 37-160 <br /> Control Limits <br /> ' Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure if <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark "'MS=Matrix Spike,MSO=MS Duplicate,RPD-Relative%Difference <br /> ' P 9502243 MMM `7' <br /> Project Manager <br />