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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 FAX (916) 921-0100 <br /> tw,aw..w,v <br /> EMCON Associates Oient Project ID shell,ago w Charter way,sweirton <br /> 1433 N Market Blvd <br /> Sacramento, CA 95834 <br /> Attention Sheila Richgels OC Sarnpie Group 2070242-52 Reported Jul 21, 1992 <br /> t. ' • � ;`7 A:o- `Gu;a�:'Y", ,. ,, ,�� ., .. , fi° ..�,. „s.44 t, fwN.x.i�-t .. •,..,:+�..�.�. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Eth* <br /> Benzene Toluene Benzene X <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst C Chapman C Chapman C Chapman C Chapman <br /> Reporting Units ppb ppb ppb ppb <br /> Date Analyzed Jul 17, 1992 Jul 17, 1992 Jul 17, 1992 Jul 17, 1992 <br /> OC Sample# 207-0236 207-0236 207-0236 207-0238 <br /> Sample Cone.: N D ND N D N D <br /> Spike Cone. <br /> Added: 10 10 10 20 <br /> Conc. Notrbc <br /> Spire: 10 10 10 19 <br /> Matrix Spike <br /> %Recovery: 100 100 100 95 <br /> Conc. Matrix <br /> Spike Dup.: 10 11 10 19 <br /> Matrix Spike - <br /> Duplicate <br /> % Recovery: 100 1710 100 95 <br /> Relative <br /> %Difference: 00 95 00 00 <br />*EQUOiA ANAL CAL %Asoweryr Cone of M 3 .Conc of Sample x 100 <br /> f / Spike Conc Added <br /> Ralairve%Difference Conc of M S -Conc of M S D x 100 <br /> Michael R Goes (Conc of M S + Conc of M S D)12 <br /> Laboratory Director <br /> 2.07Q242EMC c3> <br />