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Sequoia 680 Chesapeake Drive Redwood CityCA 94063 (650)364-9600 FAX(650)364 9233 <br /> 404 N Wlget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 5tnker 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(747)792-0342 <br /> Blaine Tech Services Client Protect ID Shell 2575 Country Club Blvd <br /> 1680 Rogers Ave <br /> San Jose, CA 95112 <br /> Attention Fran Thie QC Sample Group 9810742-15-16 Reported Oct 27, 1998 <br /> QUALITY=CONTROL=DATA REPORT <br /> Matrix Liquid <br /> Method EPA 8015 <br /> Analyst NCIGR <br /> ANALYTE Gasoline <br /> QC Batch# GC101498BTEX17A <br /> Sample No GW9809186-1 <br /> Date Prepared 10/14/98 <br /> Date Analyzed 10/14/98 <br /> Instrument I D# GCHP17 <br /> Sample Conc , ug/L N D <br /> Conc Spiked, ug1L 250 <br /> Matrix Spike, ug/L 230 <br /> % Recovery 93 <br /> Matrix <br /> pike Duplicate, ug/L 240 <br /> % Recovery 98 <br /> elative%Difference 52 <br /> RPD Control Limits 0-25 <br /> LCS Batch# GWLCS101498A <br /> Date Prepared 10/14/98 <br /> Date Analyzed 10/14/98 <br /> Instrument I D# GCHP17 <br /> Conc Spiked, ug/L 250 <br /> LCS Recovery, uglL 250 <br /> LCS% Recovery 101 <br /> Percent Recovery Control Limits <br /> MSIMSD 60-140 <br /> LCS 70-130 <br /> dual, ce 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 /> ALYTICAL preparation 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 /> erecav f analytes from the matnx spike does not fall within specified control limits due to matnx <br /> interference the LCS recove is to be used to validate the batch <br /> erager <br />