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accoE N REPORT OF LABORATORY ANALYSIS <br /> fNE ASSURANCE OF QUALItY <br /> Mr Kurt Paschl QUALITY CONTROL DATA September 07 1994 JI <br /> Page 23 PACE Project Number 440829 <br /> Client Reference #94047 10 Southeastern-Tracy Cold Stag ' <br /> VOLATILE ORGANICS, EPA METHOD 8240 GC/MS <br /> Batch 70 33601 , <br /> Samples 70 0383129 70 0383137 70 0383145 <br /> METHOD BLANK , <br /> Method <br /> Parameter Units MDL Blank <br /> Cfi7orobenzene ug/C 5— <br /> Ethylbenzene ug/L 5 ND <br /> Bromoform ug/L 5 ND <br /> Xylene(s) Total ug/L 5 ND ' <br /> Styrene ug/L 5 ND <br /> 1 ,1 2,2 -Tetrachloroethane ug/L 5 ND <br /> 1 3-Dichlorobenzene ug/L. 5 ND <br /> 1 4-Dichlorobenzene ug/L 5 ND <br /> 1 ,2-Dichlorobenzene ug/L 5 ND <br /> 1,2-Dichloroethane-d4 (Surrog Recovery % 96 <br /> Toluene-d8 (Surrogate Recovery) % 98 <br /> 4-Bromofluorobenzene (Surrog Recovery) % 106 <br /> SPIKE AND SPIKE DUPLICATE <br /> Spike <br /> Spike Dupl <br /> Parameter Units MDL 700382270 Spike Recv Recv RP <br /> T,Dicfi7oroethene u�C— Im —M —7 <br /> Benzene ug/L 5 ND 20 102% 96% 61 <br /> Trichloroethene (TCE) ug/L. 5 ND 20 100% 95% 5 <br /> Toluene ug/L 5 ND 20 100% 92% 8% <br /> Chlorobenzene ug/L 5 ND 20 91% 91% 01 <br /> LABORATORY CONTROL SAMPLE AND CONTROL SAMPLE DUPLICATE <br /> Reference Dupl <br /> Parameter Units MDL Value Recv Recv RPD <br /> 1 .1=Uichloroetheneu�1— 5 —7r — --m im --gy <br /> Benzene ug/L 5 20 92% 97% 5% <br /> Trichloroethene (TCE) ug/L 5 20 92% 97% 53 <br /> Toluene ug/L. 5 20 89% 93% 4% <br /> Chlorobenzene ug/L 5 20 86% 90% 5%' <br /> 11 DiFtal Drive An Equai Opportunity Employer <br /> Novato CA 94949 <br /> TEL 415 8831100 <br /> FAX 415 883 2673 <br />