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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue + Suite LM + Concord, California 94520 <br /> (510) 6$6-9600 + FAX (510) 686-9689 <br /> i ""a<a, t,v ,} v r vAssoclates C:llertt traject 6 '"Arco#2130,Stockton <br /> 1855 Gateway Blvd , Ste 770 Matrix Sol] <br /> Concord,CA 94520 <br /> IS Attention Paul Supple OC Sample Group 3080807-814 Reported Sep 2, 1993 ' <br /> QUALITY CONTROL DATA REPORT <br /> ANA YTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br />' Method. EPA 8020 EPA 8020 EPA 8020 EPA 8024 <br /> Analyst J F J F J F J F <br /> Cone.Spiked. 0 40 0 40 044 12 <br /> Units- mg/Kg mg/Kg mg/Kg mg/Kg <br /> LCS Batch#: 1 LCS083193 1 LCS093193 1 LCS083193 1 LCS083193 <br />' Date Prepared 8/31/93 8/31/93 8/31/93 8/31/93 <br /> Date Analyzed- 8/31/93 8/31/93 8/31/93 8/31/93 <br /> Instrument I.D.# HP-2 HP-2 HP-2 HP-2 <br /> LCS % <br /> 10 Recovery 98 96 96 98 <br /> Control Limits. 70-130 70-130 70-130 70-130 v r <br /> $ r_ y vel J r t r O r_ r r ♦ } r M1 r r Vtlh ~ <br />' MS/MSD <br /> Batch # 3080815 3080815 3080815 3080815 <br /> Date Prepared: 8/31/93 8/31/93 8/31/93 8/31/93 <br /> Date Analyzed: 8/31/93 8/31/93 8/31/93 8/31/93 <br /> Instrument I D.#: HP-2 HP-2 HP-2 HP-2 <br />' Matrix Spike <br /> %Recovery 88 88 88 93 <br />' Matrix Spike <br /> Duplicate % <br /> Recovery: 88 88 88 92 <br /> Relative% <br /> Difference. 00 00 00 1 1 <br /> SEQUOIA NA 6YTICAL Please Note <br /> The LCS Is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> plepa alytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> and are not used to accept or reject batch results <br /> Kenneth K F Lee <br /> Laboratory Director <br />' 3080807 ROU <8> <br />