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Sequoia 680 Chesapeake Drive Redwood Gty CA 94063 (4 15) 364 9600 FAX(415)364 9233 <br /> 1900 Bates Araare Swte L Concord,CA 94s2o (510) 686-9600 FAX(S 10)6"9689 <br /> Analytical 319 Striker Avenue Ste a Sadamenta CA 95534 (916) 921 9600 FAX(916)921.0100 <br /> atin'a`c. ;�.,. x'zi3 xa'``V7,Mofw�'�.. i�x•.`"��, <br /> Groundwater Techs ogy Client Protect ID San Joaquin Catholic Cemetary <br /> 1401 Halyard Drive, Suite 140 Matrix Soil <br /> West Sacramento, CA 95691 <br /> Attention Jason Fedota QC Sample Group 5041161-200 Reported May 2, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl. <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 5020 EPA 8020 EPA 8020 <br /> Analyst. C Chapman C Chapman C Chapman C Chapman <br /> Concentration <br /> Spiked- 0 20 mg/k9 0 20 mg/kg 0 2C?mg/kg 0 60 mg/kg <br /> LCS Batch# LCSO42695 LCSO42695 LCSO42695 LCSO42695 <br /> Date Prepared- 4/26/95 4/26/95 4/26/95 4/26/95 <br /> Date Analyzed 4/26/95 4/26/95 4/26/95 4/26/95 <br /> Instrument I.D #: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> Recovery 110 100 105 102 <br /> Control Limits: 75.125 75-125 75.125 75-125 <br /> MS/MSD <br /> Batch # 5041166 5041166 5041166 5041166 <br /> Date Prepared 4/26/95 4/26/95 4/26/95 4/26/95 <br /> Date Analyzed 4/26/95 4/26/95 4/26/95 4/26/95 <br /> Instrument I.D.# GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> %Recovery 105 100 100 96 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 110 100 100 100 <br /> Relative % <br /> Difference. 46 00 0 0 2(; <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 /> ? �� r preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> + L - _\- validation of sample batch results Due to matrix effects the OC limits for MS/MSDs are advisory only <br /> Linda C Shneider- and are not used to accept or refect batch results <br /> Pro)ect Manager <br /> 5041166 GRW <4> <br /> .cr <br />