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SEQUOIA ANALYTICAL <br />680 Chesapeake Drive • Redwood City, CA 94063 <br />(415) 364-9640 FAX (415) 364-9233 <br />} RESNA v vAvwv. Nr h Client Project ID Y r 150054 01, Corrigan Property <br />1710 Main Street Matnx Water <br />Escalon, CA 95320 <br />-Attenbon John Lane OC Sample Group 31-51501 <br />r 4t v . 4v`, r r r.r • . n vv r <br />QUALITY CONTROL DATA REPORT <br />ANALYTE Benzene Toluene Ethyl Xylenes Diesel <br />Benzene <br />Method: EPA 8020 EPA 8020 EPA 8020 EPA WM EPA 8015 <br />Analyst- J D risay J Drisay J Dmsay J Dinsay A- Nagra <br />MS/MSD <br />LCS122093 <br />LC8122093 <br />Batch#: <br />BLK122M <br />BLK122093 <br />Date Prepared <br />12/20/93 <br />12/20/93 <br />Date Analyzed. <br />12/20/93 <br />12/20/93 <br />Instrument LD # <br />GCML#2 <br />GCML#2 <br />Conc Spiked: <br />20 fig/L <br />20pg/L <br />Matrix Spike <br />GCML#2 <br />GCHP-4 <br />% Recovery <br />100 <br />110 <br />Matrix Spike <br />Duplicate % <br />Recovery <br />103 <br />113 <br />Relative % <br />Difference <br />30 <br />27 <br />LCS Batch# <br />LCS122093 <br />LC8122093 <br />Date Prepared: <br />12/20/93 <br />12/20/93 <br />Date Analyzed- <br />12/20/93 <br />12/20/93 <br />Instrument I D # <br />GCML#2 <br />GCML#2 <br />LCS % <br />120 <br />87 <br />Recovery. <br />97 <br />106 <br />BLK122093 BLK122093 31-48101 <br />12/20/93 <br />12/20/93 <br />12/13/93 <br />12/20/93 <br />12/20/93 <br />12/15/93 <br />GCML#2 <br />GCML#2 <br />GCHP-4 <br />20118/L <br />60 Fig/L <br />600 u9/L <br />123 <br />120 <br />87 <br />Reported Dec 22, 1993 <br />125 <br />125 <br />83 <br />16 <br />41 <br />47 <br />LCS122093 <br />LC3122093 <br />BLK121393 <br />12/20/93 <br />12/20/93 <br />12/13/93 <br />12/20/93 <br />12/20/93 <br />12/15/93 <br />GCML#2 <br />GCML#2 <br />GCHP-4 <br />118 117 65 <br />% Recovery <br />Control Limits- 71-133 72-128 72-130 71-120 38-122 <br />WEQUOIA ANALYTICAL <br />V ► ► 1 L� <br />Vlckle Ta <br />Project Manager <br />Please (Vote <br />The LCS is 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 matrix spike is an aliquot of sample <br />fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br />the recovery of analytes from the matrix spike does not fall within specified control 4mrts due to matrix <br />interference, the LCS recovery is to be used to validate the batch <br />31-51501 WAT <3> <br />