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Sequoia <br />*� <br />I!D <br />F., �„� Analytical <br />r } <br />Cetticr Ryan, Inc - Dublin <br />6747 Siena Court Suite J <br />Dubhn CA, 94568 <br />Project Unocal <br />Project Number Unocal # 0123 <br />Project Manager D==L Hardmg <br />VoIatile Organic Compounds by EPA Method 8260B - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Sprke Source %REC <br />Result Limit Units Level Result %REC Lnruts RPD <br />404 N WISet lane <br />Walnut Geek. CA 94598 <br />(975) 98S-9fr00 <br />FAX (925) 988-9673 <br />www sequolalabs corn <br />Reported <br />29 -Dec -00 07 40 <br />RPD <br />Limit Notes <br />Batch OL12004 - EPA 5030B [Pnj <br />Blank (OL12004-BLKI) <br />ND <br />Prepared & Analyzed 11 -Dec -00 <br />Ethanol <br />ND <br />500 U94 <br />U t -Butyl Alcohol <br />ND <br />50 " <br />Mdhyl tat -butyl ether <br />ND <br />20 " <br />Di -isopropyl ether <br />ND <br />20 " <br />Ethyl ted -butyl ether <br />ND <br />20 " <br />tert.An yl mdhyl other <br />ND <br />20 " <br />1.2-Dichlorodhme <br />ND <br />20 " <br />Ethylene d1womide <br />ND <br />20 " <br />Sur -saw Dibromoflaoro—d mm <br />470 <br />" 5a 0 940 50-150 <br />Sumpgaw 1,2-Dicldoroethane-44 <br />410 <br />5aO 820 30-150 <br />Blank (OL12004-BLK4) Prepared & Analyzed 13 -Dec -00 <br />ti7mityl alcohol <br />ND <br />50 <br />" <br />Methyl tort butyl Allier <br />ND <br />20 <br />" <br />Da -isopropyl Other <br />ND <br />20 <br />" <br />Ethyl tut butyl ether <br />ND <br />2.0 <br />" <br />tertrAmyl methyl ether <br />ND <br />20 <br />" <br />1.2-Dichlarndhane <br />ND <br />20 <br />" <br />Ethylene dibromde <br />ND <br />20 <br />" <br />SwTogate Dibromofluoromed mw <br />470 <br />500 <br />940 50.150 <br />Surrogate 1.2-Dichlanoetkne-d4 <br />420 <br />5a0 <br />840 50-130 <br />Blank (OL12004-BL(5) <br />Prepared 8t Analyzed. 12 -Dec -M <br />Ethanol <br />ND <br />Soo <br />ug4 <br />tert-Butyl alcohol <br />ND <br />50 <br />" <br />Methyl feet-bmyl other <br />ND <br />20 <br />" <br />Di -isopropyl other <br />ND <br />20 <br />" <br />Ethyl tod4n tyl ether <br />ND <br />20 <br />" <br />tort -Amyl methyl other <br />ND <br />20 <br />" <br />1,2-Didiloroothane <br />ND <br />20 <br />" <br />Ethylene dibromide <br />ND <br />20 <br />" <br />Swmgaw Dibromoflrrorometharu <br />4t£0 <br />SRO <br />920 30-150 <br />Surwgate 12-Dichbroethmr-rt4 <br />4a0 <br />50.0 <br />8a 0 50-150 <br />- Walnut Ch& The resells in this report apply to the smipka analyzed In accordance with die chain q <br />custody docranertt. 77ds arudybeal report meat be mpnxWed in its era herr. <br />Page 11 of 17 <br />.#. <br />