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61lesapeake Drive Redwood City CA 94� (650)364-9600 FAX(650)364-9233 <br /> Sequoia404 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 /> t Blaine Tech Services Client Project ID Shell 341 East Main St <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 <br /> Attention Fran Thle QC Sample Group 98071-186-01 Reported Aug 19, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8010/601 <br /> Analyst C Medina <br /> ANALYTE 11-DCE TGE Chlorobenzene <br /> QC Batch# GC0811980VOA09A <br /> Sample No 98071-148-09 <br /> Date Prepared 8110198 8110198 8110198 <br /> Date Analyzed 8111/98 8111198 8111198 <br /> Instrument I D# gchp09 gchp09 gchp09 <br /> Sample Conc ,uglL N D 33 N D <br /> Conc Spiked,uglL 25 25 25 <br /> Matnx Spike,ug/L 22 27 23 <br /> % Recovery 88 95 92 <br /> Matnx <br /> pike Duplicate,uglL 20 25 22 <br /> % Recovery 80 87 88 <br /> elative% Difference 95 88 44 <br /> RPD Control Limits 0-50 0-50 0-50 <br /> LCS Batch# VWLC5081198A <br /> Date Prepared 8111198 8111198 8111198 <br /> Date Analyzed 8111198 8111198 8111198 <br /> Instrument I D# gchp09 gchp09 gchp09 <br /> Conic Spiked, uglL 25 25 25 <br /> Recovery, ug/L 17 19 19 <br /> LCS%Recovery 68 76 76 <br /> Percent Recovery Control Limits <br /> MS/MSD 70-140 70-140 70-140 <br /> LCS 65-135 70-130 70-130 <br /> Quality Assurance 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 /> ellks UOIA ANALYTICAL preparation and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> r% 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 /> Pegg)�-Penner <br /> Project Manager <br />