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f \ Sequoia 680 demPeake Dnve Redwood Cary Cal 94063 (415) 364 9600 FAX(415)364-9233 <br /> 1900 Bates Anmw Swte L Concord,CA 94520 (510) 686.9600 FAX(510)686-9639 <br /> X117 Analytical af9 Stnkn Avenue Swte 8 SaCMM nt0 CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> � ,.3a ,`��.,'^�, a`�` .`Y taw`."� k`$`;'SS, <br /> 'Groundwater Technology Client Project ID San Joaqu n th' is Cemet'ary <br /> 1401 Halyard Drive, Suite 140 Matrix Soil <br /> West Sacramento, CA 95691 <br /> Attention Jason Fedota OC Sample Group 5041161-200 Reported May 2, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE cetyl <br /> Benzene Toluene Benzene Xylenes ll <br /> i <br /> Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst C Chapman C Chapman C Chapman C Chapman <br /> Concentration <br /> Spiked 0 20 mg/kg 0 2D mg/kg 0 20 mg/kg 0 60 mg/kg <br /> LCS Batch# LC$042895 LCSO42895 LCSO42895 LCSO42895 <br /> Date Prepared 4/28/95 4/28/95 4/28/95 4/28/95 <br /> Date Analyzed 4/28/95 4/28/95 4/28/95 4/28/95 <br /> Instrument I D.# GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> • Recovery 90 85 90 90 <br /> Control Limits 75.125 75.125 75-125 75-125 <br /> MS/MSD <br /> Batch# UM1080 5041080 5041080 5041080 <br /> Date Prepared 4/28/95 4/28/95 4/28/95 4/28/95 <br /> Date Analyzed 4/28/95 4/28/95 4/28/95 4/28/95 <br /> Instrument I D # GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery 85 85 85 85 <br /> Matrix Spike <br /> Duplicate's <br /> Recovery 95 90 90 90 <br /> Relative% <br /> Difference 11 $7 5, 5.7 <br /> SEQUOIA ANALYTICAL Please Note <br /> 4The LCS is a control sample of known interferent tree matrix that is analyzed using the same reagents <br /> l }1�L1 L f'f+ preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> ! ` validation of sample batch results Due to matrix etiects the OC limits for MS/MSDs are advisory only <br /> Linda C SChnelder and are not used to accept or refect batch results <br /> Project Manager <br /> 5041166 GRW <5> <br /> r^� <br />