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� <br />Sequoia <br />Ci) <br />680 ChesApeaKc l]r,we Redwood City CA 94063 J4 15) <br />344 9600 <br />FAX (4151 364 9233 <br />•1 <br />Iwo Anaiyticai <br />14(1[7 8atec Avenut 5u�te � Concord CA o4sZ(t �c1(11 <br />819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) <br />hR(+ 4F,(Nt <br />921 %00 <br />FAX �Sin� RRF OFRq <br />FAX (916) 971 0100 <br />C Chapman <br />C Chapman <br />Concentration <br />groundwater Technology <br />Client Project ID Chevron #9-2033, Stockton, CA <br />A <br />1401 Halyard Drive, Suite 140 <br />Matrix Soil <br />0 20 mg/kg <br />0 60 mg/kg <br />West Sacramento, CA 95691 <br />LCS033095 <br />LCS033095 <br />LCS033095 <br />' Attention Jason Fedota <br />OC Sample Goup 5031072-1109 <br />Reported <br />Apr 4, 1995 <br />+ ^�� + '` t„ ` o ,,,,,, r, . 4 N, . a . . sr"� �,r. • f,. ,.{+v .v tied, yf � <br />,. <br />.. .. 5„} t ,. <br />QUALITY CONTROL DATA REPORT <br />ANALYTE Ethyl - <br />Benzene Toluene Benzene Xylenes <br />Method: <br />BPA 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 />LCS033095 <br />LCS033095 <br />LCS033095 <br />LCS033095 <br />Date Prepared. <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />Date Analyzed: <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />Instrument LD #: <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />LCS <br />Recovery,. <br />y <br />so <br />90 <br />so <br />9a <br />Control Ljmits: <br />75-125 <br />75-125 <br />75.125 <br />75-125 <br />.y. aw. a ,.. <br />,. ,. ,,. ..,, wn.+. ., <br />+,.. r v t ..tet,.. .,. <br />t .Y+ti., t r+ �+v.m< vho ,• 1 r...,...,..r„„a n..v..w + t vr..Y 4.+ ,..wv ,n`n,>E.: •.. >,.,i.,h-n o tis da <br />MS/MSD <br />Batch #: <br />5030964 <br />5030964 <br />5030964 <br />5030964 <br />Date Prepared: <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />Date Analyzed <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />3/30/95 <br />Instrument I.D.#: <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />GCHP-1 <br />Matrix Spike <br />°% Recovery: <br />85 <br />a5 <br />a5 <br />87 <br />Matrix Spike <br />Duplicate °% <br />Recovery. <br />90 <br />90 <br />95 <br />93 <br />Relative °% <br />Difference <br />57 <br />57 <br />11 <br />67 <br />SEQUOIA ANALYTICAL <br />Linda C Schneider <br />Protect 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 />.s• <br />5031872 GRW <18> <br />