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Sequoia 680 Chesapeake Dnve Redwood Ctry CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> ' 404 N \%/,get Lane Wa)nu(Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analyt Cal 819 StnkerAvenue Suite 8 Sacramento CA 95834 (916f 921 9600 FAX (916)921 0100 <br /> Delta Environmental Consultants Client Project ID Unocal #5886 <br /> 64 Gold Camp Dr, Suite 200 Matrix Sod <br /> ' Rancho Cordova, CA 95670 <br /> Attention Eric Holm OC Sample Group 507-1403 Reported Aug 10 1995 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' ANALYTE 24•0initro- Penta- <br /> Acenaohthene 4-Nltroohenol toluene chleroohenol Pyrene <br /> ' Method EDA 8270 EPA 8270 EPA 8270 EP'k 8270 EPA 8270 <br /> Analyst- E Manuel E Manuel E Manuel E Manuel E Manuel <br /> Concentration <br /> ' Spiked 100 ug/L 100 ug/L 100 ug/L 100 ug/L 100 ug/L <br /> LCS Batch# LOS072795 LCS072795 LCS072795 LCS072795 LCS072795 <br /> ' Date Prepared 7/27/95 7/27/95 7/27/95 7/27/95 7/27/95 <br /> Date Analyzed: 8/2/x5 8/2/95 8/2/95 8/2/95 8/2/95 <br /> Instrument LD # F4 F4 F4 F4 ;:4 <br /> ' LCS % <br /> Recovery 76 69 74 77 89 <br /> Control Limits 47-145 RL-132 39-139 14-176 52-115 <br /> ' MS/MSD <br /> Batch # 9507F8944 9507F89-04 9507F89-04 9507F89-04 9507F89-04 <br /> ' Date Prepared 7/27/95 7/27/95 7/27/95 7/27/95 7/27/95 <br /> Date Analyzed 8/2/95 8/2/95 8/2/95 8/2/95 8/2/95 <br /> Instrument 1.1) ,# F4 F4 F4 F4 F4 <br /> ' Matrix Spike <br /> % Recovery' 78 75 79 84 90 <br /> ' Matrix Spike <br /> Duplicate % <br /> Recovery 74 70 77 78 82 <br /> ' Relative % <br /> Difference 53 69 25 74 93 <br /> 1 <br /> SEQUOIA ANALYTICAL Please Note <br /> % The LCS is a control sample OT known �ntenerent tree matrix that is analyzed using the same reagents <br /> preparation ana analytical methoas empioyea for the samptes The LCS%recovery data is usea for <br /> - - validation OT sample batcn results Due to matrix etfects ,he CC limits far MS,MSD s are aovisery enry <br /> Linda C Schneider ana are not used to accent or resect batch results <br /> Project Manager Page 2 OT 2 <br /> 5071403 D LT <9> <br /> _G <br />