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' Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX (4i5)364 9233 <br /> 404 N Wiget Lane Walnut Cieek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Sinker Avenue Suite a Sacramento CA 95834 (916? 921 9600 FAX{916)921 0100 <br /> Kleinfelder Client Project ltd 20-1129-30 <br /> ' 2825 East Myrtle St Matrix Water <br /> Stockton, CA 95205 <br /> Attention Roman Racca QC Sample Group 705-0607 Reported Jun 3, 1997 <br /> r <br /> QUALITY CONTROL DATA REPORT <br /> ' ANALYTE 1,1-Dichloro- Chloro- <br /> ethane Trichloroethene Benzene Toluene benzene <br /> Method. EPA 8240 EPA 8240 EPA 8240 EPA 8240 EPA 8240 <br /> Analyst- K Pocan K Pocan K Pocan K Pocan K Pocan <br /> Concentration <br /> Spiked 50 mg/L 50 mg/L 50 mg/L 50 mg/L 50 mg/L <br /> LCS Batch# LCS060297 LCS060297 LCS060297 LCS060297 LCS060297 <br /> Date Prepared 06/02/97 06/02/97 06/02/97 06/02/97 06/02/97 <br /> Date Analyzed- o6/02/97 06/02/97 06/02/97 06/02/97 06/02/97 <br /> Instrument LD # MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 <br /> LCS % <br /> Recovery 97 109 109 107 100 <br /> Control Limits 65-135 70.130 70-130 70-130 70-130 <br /> v4 Jti`{ +r.S rJrvtr}try <br /> MS/MSD <br /> ' Batch# 7050605 7050605 7050605 7050605 7050605 <br /> Date Prepared- 06/02/97 06/02/97 06/02/97 06/02/97 06/02/97 <br /> Date Analyzed 06/02/97 06/02/97 06/02/97 06/02/97 06/02/97 <br /> Instrument I D #• MS-F1 MS-F1 MS-F1 MS-F1 MS-171 <br /> Matrix Spike <br /> ' %Recovery: 104 102 107 107 104 <br /> Matrix Spike <br /> Duplicate% <br /> ' Recovery 105 103 105 106 103 <br /> Relative% <br /> ' Difference: 10 10 20 1 0 10 <br /> Please Note <br /> The LCS is a control sample of known,lnterfarent free 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 QC limits for MS/MSD`s are advisory only <br /> and are not used to accept or reject batch results <br /> Edana M Fruciano <br /> Project Manager/Sacramento Laboratory <br /> ' 7050607 KLF <7> <br /> ,49. <br />