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Sequoia 680 Chesapeake Dn�c Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9133 <br /> 404 N Wiget Lanc Walnw Crcck CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue Susie 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Pacific Environmental Group, Inc Client Oroje' lb Chevron #9-6258 Stockton, CA <br /> 11315 Sunrise Gold Circle, #M Matrix Sod <br /> Rancho Cordova CA 95742 <br /> Attention Roger Hoff more QC Sample Group 6091009-18 Reported Oct 1, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE 1,4-Dwhloro- N-Nitroso Ch- 1,2,4-Tnchloro- 4-Chloro-3- <br /> Phenol 2-Chlorophenol benzene N-propoamine benzene Methylphenyl <br /> Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Analyst B Pitamah B Pitaniah B Pitamah B Pitamah B Pitamah B Pitamah <br /> Concentration <br /> Spiked 3300 ug/kg 3300 ug/kg 3300 ug/kg 3300 ug/k9 3300 u9/k9 3300 ug/kg <br /> LCS Batch# LCS092696 LCSM2696 LCS092696 LCS092696 LCS092696 1-CS092696 <br /> Date Prepared 09/26/96 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 09/26/96 <br /> Instrument I D # H5 H5 H5 H5 H5 HIS <br /> LCS % <br /> Recovery 70 73 61 73 67 76 <br /> Control Limits 47-107 59-97 54-93 55-114 60-95 54-100 <br /> nw n� .•> 4 ..v ifJ lr$j h{ Y ` x Y Y3x v n <br /> MS/MSD <br /> Batch# 9609E75-01 9609E75-01 %WE7501 96ME75-01 9609E75-01 9609E75-01 <br /> Date Prepared 09/26/96 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 09/26/96 <br /> Instrument 1.1) # H5 HS HS H5 H5 H5 <br /> Matrix Spike <br /> % Recovery 70 64 42 64 55 67 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 73 67 45 67 58 67 <br /> Relative% <br /> Difference 43 47 69 47 54 00 <br /> Please Note <br /> • SEQUOIA ANALYTICAL The LCS 1s a control sample of known interferent free matrix that is analyzed yzed using the same reagents <br /> preparation and analytical methods employed for the samples The LGS%recovery data is used for <br /> validation of sample batch results Due to matrix effects the OC iimits for MS/MSDs are advisory only <br /> and are not used to accept or reject batch results i <br /> C Schneider <br /> 7pinda <br /> roject Manager/Sacramento Laboratory Page 1 of 2 <br /> 6o91oo9PES 201 <br />