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r ® , SegUDia 690 Chesrncike UTrve Redwood C}ty CA 940(,3 (415) 3b4 9604 FAX (415) 364 9211 <br /> ���� 404 N Wlgct Lane "Valnw Creek CA 91594 (510) 919 9600 FAX(510)998 7,73 <br /> Analytical A1951nkrrAvenue 5wtc$ Sacramcntr, CA 95834 (916) 7nQ0 FAX (9s6)9zt 010() <br /> Environmental Resolutions Client Project ID Unocal 5886, 205503 <br /> 74 Digital Drive, Ste 6 Matrix Solid <br /> Novato CA 94949 <br /> Attention Keith Romstad Work Order # 9704614 01 <br /> Reported May 2 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br /> OC Batch# GC0421970HBPEXA <br /> Analy Method EPA 8015M <br /> Prep Method EPA 3550 <br /> Analyst B Sullivan <br /> MS/MSD # 970475414 <br /> Sample Conc 1 4 <br /> Prepared Date 4/21/97 <br /> Analyzed Date 4/21/97 <br /> Instrument I D # GCHP4A <br /> Conc Spiked 25 mg/Kg <br /> Result 19 <br /> MS % Recovery 70 <br /> Dup Result 21 <br /> MSD % Recov 78 <br /> RPD 10 <br /> RPD Limit 0 50 <br /> LCS # BLK042497S <br /> Prepared Date 4/24/97 <br /> Analyzed Date 4/25/97 <br /> Instrument I D # GCHP4B <br /> Conc Spiked 25 mg/Kg <br /> LCS Result 16 <br /> LCS % Recov 64 <br /> i <br /> MS <br /> I <br /> 50 150 <br /> LCS 60-140 <br /> Control Limits <br /> Please Note <br /> The LCS Is a control sample of kno vn,Interferent free matrix that 1s agalyzed using the samereagents <br /> ,SEQU ]A ANALYTICAL preparation,and analytical methods employed for the samples The ma,',x spike 1s an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure ff <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> Kevin Follett Interference the LCS recovery 1s to be used to validate the batch <br /> Project Manager MS=Matrix Spike MSD=MS Duplicate RPD=Relative % Difference <br /> 9704B14EEE <1> <br />