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j SEQUOIA ANALYTICAL <br />680 Chesapeake Drive - Redwood City, CA 94063 <br />o(415) 364-9600 FAX (415) 364-9233 <br />RESNA Client Project ID u150054 01, Corrigan Property <br />1710 Main Street Matrix Soil v <br />N Escalon, CA 95320 <br />`'Attention John Lane QC Sample Group 31_67701-5 Reported Dec 21, 1993~, <br />QUALITY CONTROL DATA REPORT <br />ANALYTE Benzene <br />Toluene Ethyl Xylenes Diesel <br />Date Prepared - - <br />Benzene <br />Method. EPA 8020 <br />EPA 8620 EPA 8020 EPA 80`2] EPA 8015 <br />-Analyst: E Cunanan <br />E Cunanan E Cunanan E Cunanan A_Nagra <br />MS/MSD <br />- - BLK121M <br />Date Prepared - - <br />- - 12/16/93 <br />Date Analyzed. - - <br />Batch#. <br />3LS3601 <br />3L53601 <br />3L53601 <br />3L53601 <br />Date Prepared: <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />Date Analyzed: <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />12/16/93 <br />Instrument I.D.#: <br />GCHP-6 <br />GCHP6 <br />GCHP-6 <br />GCHP-6 <br />Cone Spiked: <br />0 20 mg/kg <br />0 20 mg/kg <br />0 20 mg/kg <br />0 60 mg/kg <br />Matrix Spike <br />% Recovery: 73 76 78 <br />i <br />Matrix Spike <br />Duplicate % <br />Recovery 77 so 81 <br />Relative % <br />Difference. 53 51 38 <br />t V 1 r Y� v \x v}{ }.kv y vx v v l x J n ` ♦ r ` r.k ! ? <br />77 <br />Ell <br />3LG7705 <br />12/16/93 <br />12/17/93 <br />GCHP-5 <br />15 mg/kg <br />93 <br />93 <br />38 00 <br />t v n r -. { A r t s ♦ � s v v lA.+f"'v n / sxV <br />LCS Batch# - - <br />- - BLK121M <br />Date Prepared - - <br />- - 12/16/93 <br />Date Analyzed. - - <br />- - 12/17/93 <br />Instrument LD #: - - <br />- - GCHP-5 <br />LCS % <br />Recovery: - - <br />- - 113 <br />% Recovery <br />Control Limits, 55-145 47-149 47-155 5!'x140 38-122 <br />SPE01.101A <br />ANALYTICAL <br />MTqkA___ <br />Vic oe Tague <br />Project Manager <br />Please Note <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 limits due to matrix <br />interference, the LCS recovery is to be used to validate the batch <br />3l 67701 WAT c3> <br />