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Sequoia <br />' VO Analytical <br />680 Chesapeake Dave Redwood CLq CA 94063 1415 3454 9600 FAX 1415, 364 9233 <br />1900 Bates Avenue Sunt L Concord CA 44520 (510} 686 96M FAX (S 10? 686 %8q <br />819 btnker Avenue Suite 8 Sacramento CA 95834 1916) 921 9600 FAX (916) 921 0100 <br />groundwater Technology Client Project ID- Chevron #9-2033, Stockton, CA <br />1401 Halyard Drive, Suite 140 Matrix Soil x <br />West Sacramento, CA 95691 <br />Attention Jason Fedota OC Sample Goup 5031072-1109 Reported Apr 4, 1995v <br />rte, <br />QUALITY CONTROL DATA REPORT <br />ANALYTE Ethyl - <br />Benzene Toluene Benzene Xylenes <br />Method: <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />EPA 8020 <br />Analyst, <br />C Chapman <br />C Chapman <br />C Chapman <br />C Chapman <br />Concentration <br />Spiked: <br />0 20 mg/kg <br />0 20 mg/kg <br />0 20 mg/kg <br />0 60 mg/kg <br />LCS Batch#. <br />LCS032995 <br />LCS032995 <br />LCS032995 <br />LCS032995 <br />L <br />Date Prepared: <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />Date Analyzed- <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />Instrument l.D.#: <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />LCs °% <br />Recovery: <br />105 <br />105 <br />105 <br />105 <br />Control Limits: <br />75-125 <br />75.125 <br />75-125 <br />75-125 <br />�M'W,�j v`y',K}vryrr .v v♦4r . k r i nr <br />�ixv v�cv.,iv x} vv�vv' tU .. ..r SM1. 4. M1Wr.+n .vn .. <br />4'C v. vyty rrc ,. r v ]r,r rryyv♦ vrvr rVr} ,S 4�W.N6 �i �tvr v��c 'n✓ ,�?h 5..b) `S�'h4]tlQh fnv ....}vx�w^'4 <br />r ria oft, xn xv rn rry vvr-u �r+Cv rr v v vmw n vmm r mmx v wry vx~x r] vnv'rwiv rcx vrrmmv r vni v ,}JG ,' M rK+t{nb]..i .h � <br />MS/MSD <br />Batch #: <br />5031095 <br />5031095 <br />5031095 <br />5031095 <br />Date Prepared. <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />Date Analyzed- <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />3/29/95 <br />Instrument I D.#: <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />Matrix Spike <br />"% Recovery: <br />100 <br />100 <br />105 <br />103 <br />Matrix Spike <br />Duplicate °% <br />Recovery. <br />1 DO <br />100 <br />105 <br />105 <br />Relative °% <br />Difference <br />00 <br />00 <br />00 <br />19 <br />SEQUOIA ANALYTICAL <br />�l e ?; L w Zf <br />Linda C Schneider <br />Project Manager <br />Please Note <br />The LCS 1s a control sample of known, interferent free matrix that is analyzed using the same reagents, <br />preparation and analytical 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/MSDs are advisory only <br />and are not used to accept or reject batch results <br />W <br />5031072 G RW <17> <br />