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�� � 680 Chesapeake Drive Redwood City CA 94063 (650)364-%00 FAX(650)364-9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> � �li�� 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd Horth Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Project ID Shell 1071 N Main St <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9807H85 Reported Sep 10, 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# GCO810980VOA24A <br /> Sample No 9807J48-02 <br /> Date Prepared 819198 819/98 8/9/98 <br /> Date Analyzed 8/10/98 8/10198 8/10198 <br /> Instrument I D# gchp24_2 gchp24_2 gchp24_2 <br /> Sample Conc,ug/L N D 32 N D <br /> Conc Spiked, ug/L. 25 25 25 <br /> Matrix Spike,ug/L 24 23 25 <br /> %Recovery 96 79 1000 <br /> Matrix <br />.piste Duplicate,ug/L 25 26 25 <br /> % Recovery 1000 91 1000 <br /> elative% Difference 41 14 00 <br /> RPD Control Limits 0-50 0-50 0-50 <br /> LCS Batch# VWLCS081098A <br /> Date Prepared 8/10/98 8110/98 8/10198 <br /> Date Analyzed 8110/98 8/10/98 8/10198 <br /> Instrument I D# gchp24_2 gchp24_2 gchp24 2 <br /> Conc Spiked, uglL 25 25 25 <br /> Recovery, ug/L 27 25 27 <br /> LCS% Recovery 108 1000 108 <br /> Percent Recovery Control Limits <br /> MS/MSD 60-140 60-140 60-140 <br /> LCS 55-135 70-130 70-130 <br /> Quality Assun Statement. All standard operating procedures and quality control requirements have been met <br /> Please Note <br /> The is a oontrol sample of known interferent free matrix that is analyzed using the same reagents <br /> CQ <br /> Sof NALYT reparation,and analyucai methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specifc compounds and subjected to the entire analytical procedure if <br /> f 1 the recovery of analytes from the matnx spike does not fall within specified control limits due to matrix <br /> 11 interference the LCS recovery is to be used to validate the batch <br /> Peggy Penner <br /> Project Manager <br />