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' Sequoia 680 C-iesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Geek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> !D— <br /> Analytical 819 Stryker Avenue Suite a Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Weinfeider Tient Project Ib 20-1129-30 <br /> 2825 East Myrtle St Matrix Water <br /> Stockton, CA 95205 <br /> Attention Roman Racca QC Sample Group 705-0607 Reported Jun 3, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <br /> ANALYTE 2,4-D1nitro- Penta- <br /> ' Acena hthens 4-Nitrophenol toluene chlorophenol Pyrene <br /> Method- EPA 8270 EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Analyst I Dalvand I Dalvand I Dalvand I Dalvand I Dalvand <br /> Concentration <br /> Spiked 100pig/L 200 pg/L 100pg/L 200pg/L 100pg/L <br /> iLCS Batch# LC8052397 LCS052397 LCS052397 LCS052397 LCS052397 <br /> Date Prepared. 05/23/97 05/23/97 05/23/97 05/23/97 05/23/97 <br /> ' Date Analyzed 05/26/97 05/26/97 05/26/97 05/26/97 05/26/97 <br /> Instrument I D#: GC/MS-1 GC/MS-1 GC/MS-1 GC/MS-1 GC/MS-1 <br /> LCS% <br /> . Recovery. 92 90 92 110 110 <br /> Control Limits: 46-118 10-80 24-96 9-103 26-127 <br /> MS/MSD <br /> Batch# BS052397 BS052397 BS052397 BS052397 BS052397 <br /> Date Prepared: 05/23/97 05/23/97 05/23/97 05/23/97 05/23/97 <br /> 1 Date Analyzed 05/26/97 05/26/97 05/26/97 05/26/97 05/26/97 <br /> Instrument LD#. GC/MS-1 GC/MS-1 GC/MS-1 GC/MS-1 GC/MS-1 <br /> Matnx Spike <br /> %Recovery 100 90 96 115 110 <br /> Matrix Spike <br /> ' Duplicate% <br /> Recovery 100 85 98 115 110 <br /> Relative% <br /> ' Difference 00 57 21 00 00 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> M �lrrp�1O preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSDs are advisory only <br /> Edana M Fruciano and are not used to accept or reject batch results <br /> Project Manager/Sacramento Labor-5077 Page 2 of 2 <br /> ' 7050607 KLF <9> <br />