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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364-9600 FAX(415)364 9233 <br /> 404 NWiget lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10)986-9673 <br /> 14WD <br /> Anaiytieal <br /> y 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> r:AM-West ' ' Client Project tC #2308 OI]/Catellus-Stockton <br /> 1777 Botelho Dr, Ste 260 Matrix Liquid <br /> Walnut Creek, CA 94596 <br /> Attention Arun Chemburkar OC Sample Group 4111006-16 Reported Dec 5, 1994, <br /> r n + .. ` i r iry ..n�. n r ' `4 ` ♦ " ` r ` n^ • r F . r <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method, EPA 9020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: J Minkel J Minkel J Minkel J Minkel <br /> ' MS/MSD G9411C26 G9411C26 G9411C26 G9411C26 <br /> Batch# -03D -03D -03D -03D <br /> ' Date Prepared. N/A N/A N/A N/A <br /> Date Analyzed. 11/30/94 11/30/94 11/30/94 11/30/94 <br /> Instrument I.D.#. GCHP-17 GCHP-17 GCHP-17 GCHP-17 <br /> Cone.Spiked: 10pg/L 10ug/L 10pg/L 30pg/L <br /> Matrix Spike <br /> %Recovery: 91 94 94 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 94 94 94 93 <br /> Relative% <br /> Difference: 32 00 00 00 <br /> n j , l ry ' rry V' . Gt J `r n ` l ri , 4 +ter r •v.. r.r w v <br /> ' LCS Batch#. <br /> Date Prepared _ - <br /> ' Date Analyzed- <br /> Instrument I.D.#: <br /> LCS % <br /> Recovery- _ _ - <br /> ecovery <br /> ' Control Limits. 71-133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL,#1210 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 /> om the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Kenneth 1, F l_ee <br /> Laboratory Director <br /> ' 4111006 ERM t5> <br />