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li .i� tiro <br /> 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Protect ID Shell 1071 N Main St 0 <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 _ <br /> Attention Fran Thie QC Sample Group 9810727-01 Reported Oct 23, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 801018020, 6011602 <br /> Analyst C Medina <br /> ANALYTE 1,1-DCE TCE Chlorobenzene <br /> QC Batch# GC1019980VOA24A <br /> Sample No 9814A38-01 <br /> Date Prepared 10/16/98 10/16/98 10/16/98 <br /> Date Analyzed 10/17/98 14/17/98 10/17/98 <br /> Instrument I D# gchp24_2 gchp24_2 gchp24_2 <br /> Sample Conc, ug/L ND 670 N D <br /> Conc Spiked, ug/L 625 625 625 <br /> Matrix Spike, ug/L 570 1100 570 ' <br /> % Recovery 91 69 91 <br /> Matrix <br /> pike Duplicate, ug/L 590 1100 , 570 <br /> % Recovery 94 69 91 <br /> elative% Difference 32 00 00 <br /> RPD Control Limits 0-50 0-50 0-50 <br /> LCS Batch# VWLCS101998A <br /> Date Prepared 10/19/98 10/19/98 10/19/98 <br /> Date Analyzed 10/19/98 10/19/98 10/19/98 <br /> Instrument I D# gchp24_2 gchp24_2 gchp24_2 <br /> Conc Spiked, ug/L 25 25 25 <br /> Recovery, ug/L 19 18 18 <br /> LCS% Recovery 76 72 72 <br /> Percent Recovery Control Limits <br /> MSIMSD 60-140 60-140 60-140 <br /> LCS 65-135 70-130 70-130 <br /> Quality As urance Statement All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents <br /> SE OIA NAI_YTICALWrration and analytical methods employed for the samples The matnx spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference the LCS recovery is to be used to validate the batch <br /> Pe gy Penner <br /> P tett Manager <br />