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—Superior Precision Anaiytica/-Inc. <br /> 1 555 Burke, Unit I • San Francisco, California 94124 • X415 647-2081 /fax 415) 821-7123 <br /> EPA SW-846 METHOD 8270 SEMIVOLATILE ORGANICS BY GC/MS <br /> Quality Assurance and Control Data - Soil <br /> Laboratory Number 15540 <br /> Method Spike <br /> Compound Blank RL Recovery Limits RPD <br /> (ug/Kg) (ug/Kg) (%) (%) (%) <br /> bis(2-chloroethyl) ethe: ND<300 300 <br /> aniline: ND<400 400 <br /> phenol: ND<300 300 68/69 55-105 1% <br /> 2-chlorophenol: ND<300 300 69/71 60-111 3% <br /> 1, 3-dichlorobenzene: ND<400 400 <br /> 1, 4-dichlorobenzene: ND<400 400 64/65 52-116 2% <br /> 1, 2-dichlorobenzene: ND<300 300 <br /> benzyl alcohol: ND<300 300 <br /> bis- (2-chloroisopropyl: ND<300 300 <br /> 2-methylphenol: ND<300 300 <br /> hexachloroethane: ND<400 400 <br /> n-nitroso-di-n-propyla: ND<300 300 70/71 59-130 1% <br /> 4-methylphenol: ND<300 300 <br /> nitrobenzene: ND<300 300 <br /> isophorone: ND<300 300 <br /> 2-nitrophenol: ND<300 300 <br /> 2 , 4-dimethylphenol: ND<300 300 <br /> bis(2-chloroethoxy)met: ND<300 300 <br /> 2,4-dichlorophenol: ND<300 300 <br /> 1,2 , 4-trichlorobenzene: ND<300 300 74/75 45-119 1% <br /> naphthalene: ND<300 300 <br /> benzoic acid: ND<300 300 <br /> 4-chloroaniline: ND<400 400 <br /> hexachlorobutadiene: ND<400 400 <br /> 4-chloro-3-methylpheno: ND<300 300 75/76 50-120 1% <br /> 2-methyl-naphthalene: ND<300 300 <br /> hexaclorocyclopentadie: ND<300 300 <br /> 2 , 4, 6-trichlorophenol: ND<300 300 <br /> 2 , 4 , 5-trichlorophenol: ND<800 800 <br /> Page 5 of 7 <br /> Certified Laboratories <br />