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Sequoia 680 Clictarcakc Dnvc Rcdwood Gty CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404N Wiget Lanc Walnut Crcck CA 94598 (5 10) 988 9600 FAX (510)988 9673 <br /> �, Analytical 819 Stnkcr Avcnuc Sur1c 8 Sacramcnto CA 95834 (916) 921. 9600 FAX(916)921 0100 <br /> • <br /> Pacific'lrnvironmental Group, Inc Client Project ID Chevron #9-6258, Stockton, CA <br /> 11315 Sunrise Gold Circle, #M Matrix Soil <br /> Rancho Cordova, CA 95742 <br /> Attention Roger Hoff more OC Sample Group 6091009-18 Reported Oct 1, 1996 <br /> (QUALITY CONTROL DATA REPORT <br /> ANALYTE 2,4-Din1Vo- Penta <br /> Arena hthene 4-Nitro henol toluene chlorophenol Pyrene <br /> Method: EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Analyst B Pitamah B Pdamah B Pltamah B Pitamah B Pltamah <br /> Concentration <br /> Spiked 3300 ug/kg 3300 ug/kg 3300 ug/kg 3300 ug/kg 9300 ug/kg <br /> LCS Batch#- LCS092696 LCS092696 LCS092696 LCS092696 LCS092696 <br /> Date Prepared: 09/26/96 09/26/96 09/26/96 09/26/96 09/26/96 <br /> Date Analyzed 09/26/96 09/26/96 09/26/96 09/26/96 09/26/96 <br /> Instrument I D.#: H5 H5 H5 H5 H5 <br /> • LCS% <br /> Recovery 76 73 7D 64 7s <br /> Control Limits 5196 21 114 45-100 22-117 5&114 <br /> M5/MSD <br /> Batch#' 9609E75-01 9G09E75-01 9609E75 01 9609E75 01 9G09E75 O1 <br /> Date Prepared: 09/26/96 09/26/96 09/26/96 09/26/96 09/26/96 <br /> Date Analyzed: 09/26/96 09/26/96 09/26/96 09/26/96 09/26/96 <br /> Instrument I D.#' H5 H5 H5 H5 H5 <br /> Matrix Spike <br /> %Recovery 67 79 64 S1 55 <br /> Matrix Spike <br /> Duplicate% <br /> 58 <br /> Recovery 70 79 413 <br /> Relative% <br /> Difference 44 00 00 22 54 <br /> • SEOUOIA ANALYTICAL 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 /> f/ e/ 7 validation of sample batch results Due to matnx effects the OC limits for MS/MSOs are advisory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager/Sacramento Labora ory Page 2 of 2 <br /> 6091009 PES -211 - <br />