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SEQUOIA ANALYTICAL <br /> L 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> tiz Associate`s Y^" "};` ' lient'Pro7ect'il�A v A^rco#Yb9,3h93�-1 /Tracy: <br /> 855 Gateway Blvd , Ste 770 Matrix <br /> ncord, CA 94520 <br /> Attention Paul S,it,pple QC Sample Group 3071018-25 Reported , 1993 <br /> xhati. WimavLn vi avf .r v hW {Vi.v r ] 4N v`4.m rinJ ' ♦ r ! . a i v n.v Aug`' <br /> Lqx zYa v} n sv nry vv nv iA 4C n � <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Lead <br /> ' Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 7421 <br /> Analyst J F/A.P/A.T J F/A.P/AT J F/kP/AT J F/AP/AT KVS <br /> Conc Spiked. 040 040 040 040 so <br /> Units- m9/Kg m9/K9 m9/K9 m9/Kg mg/Kg <br /> ' LCS Batch#-. 2LCS072M 2LCS072993 2LCS072993 2LCS072993 BLK072393 <br /> Date Prepared: 7/29/93 7/29/93 7/29/93 7/29/93 7/23/93 <br /> Date Analyzed 7/29/93 7/29/93 7/29/93 7/29/93 7/26/93 <br /> strument I D #: HP-4 HP-4 HP-4 HP-4 SpectrAA-400 <br /> 10 LCS% <br /> Recovery: 88 90 90 95 98 <br /> Control Limits: 70-130 70-130 70-130 70-130 75-125 <br /> ^' a n `^ r as .f.! v.r a.".` w ! a u f r r !{ •a n+ r F <br /> {}}vvf tifV ♦ .n ^ .an ! .trav nriahr ahi rvvv axarr r } aa . v aw vnr a ; C` v <br />' MS/MSD <br /> Batch#: 3071032 3071032 3071032 3071032 3070979 <br /> tDate Prepared: 7/28/93 7/28/93 7/28/93 7/28/93 7/23/93 <br /> Date Analyzed- 7/29/93 7/29/93 7/29/93 7/29/93 7/26/93 <br /> istrument I D.#. HP-4 HP-4 HP-4 HP-4 SpectrAA-400 <br />' Matrix Spike <br /> % Recovery: 88 85 88 91 108 <br />' Matrix Spike <br /> Duplicate% <br /> Recovery: 88 88 90 93 104 <br />' Relative% <br /> Difference: 00 35 22 22 38 <br /> EQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,Interferent free matrix that is analyzed using the same reagents, <br /> preparation and an ical 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/MSDs are advisory only <br /> tenneth K F Lee and are not used to accept or refect batch results <br /> Laboratory Director <br /> 3071018 ROU <8> <br />