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Superior ,Precision Analytical, /rnc_ <br /> A member of ESSCQN Environmental Support Service Consortium <br /> EPA SW-846 Method 8260 Volatile Organics by GC/MS <br /> Quality Assurance and Control Data <br /> Laboratory Number. 81274 <br /> Method Blank(s) i <br /> BD201 09-01 <br /> Conc RL <br /> ug/L <br /> 1, 3-Dichloropropane ND 3 <br /> Tetrachloroethene ND 3 <br /> 4-Chlorotoluene ND 3 <br /> 2-Chlorotoluene ND 3 <br /> 1, 3, 5-Trimethylbenzene ND 3 <br /> tent-Butylbenzene ND 3 <br /> sec-Butylbenzene ND 3 <br /> 1,2,4-Trzchlorobenzene ND 6 <br /> n-Propylbenzene ND 3 <br /> 1, 1,2,2-Tetrachloroethane ND 3 <br /> Chlorobenzene ND 3 <br /> Ethyl Benzene ND 3 <br /> Styrene ND 3 <br /> lens ND 3 <br /> -Dichlorobenzene ND 3 <br /> --Dichlorobenzene ND 3 <br /> p-Isopropyltoluene ND 3 <br /> 1,2-Dichlorobenzene ND 3 <br /> n-Butylbenzene ND 3 <br /> 1,2-Dibromo-3-chloropropane ND 6 <br /> 1,2,4-Trimethylbenzene ND 3 <br /> Napthalene ND 6 <br /> Hexachlorobutadiene ND 6 <br /> 1,2,3-Trichlorobenzene ND 6 <br />» Surrogate Recoveries (%) <¢ <br /> Dibromofluoromethane 100 <br /> Toluene-d8 99 <br /> Bromofluorobenzene 88 <br /> Page 9 of 10 <br /> Certified laboratories <br /> 825 Arnold Dr Suite 1 14 1555 Burke St Unit 1 309 5 Cloverdale St, Suite 8-24 <br /> Martinez Calrfornfa 94553 San Francisco, California 94124 Seattle Washington 98108 <br /> (5 10) 229-1512 /fax (510) 229-1526 (415) 647-2081 /fax (415) 821-7123 (206) 763-2992 / fax (206) 763-8429 <br />