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6-16-1998 12:50PM FROM ADVANCED GEOENVIRONM 209 467 1118 P- 7 <br /> JUN-12-98 FRI 05:10 PM ALP}ANALYTICAL LA90RAT FAX N0. 707 468 "47 P. 07 <br /> TV � <br /> Alpha(Analytical Laboratories Inc. eso waush tee,tt-t, Ukiah,Cdaorma 95M <br /> (707)4%Ml <br /> Page 2 <br /> Quality Control Report <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> Recovery Recovery Recovery RPD <br /> % t 4 % <br /> Chlorobenzene ND 95.6 94 . 3 1.37 <br /> Chloroethane ND 110 106 3.7 <br /> Chloroform NO 104 101 2.93 <br /> Chloromethane ND 82 .9 78 .8 5.07 <br /> Chlorotoluene ND 108 105 2.82 <br /> Dibromochloromethane ND 109 106 2.79 <br /> 1,1-Dichloroethylene ND 111 107 3.67 <br /> trans-1,2-Dichloroethylene ND 104 101 2.93 <br /> cis-1,2-Dichloroethylene ND 105 103 1.92 <br /> Dichlorodifluoromethane ND 59.8 57.1 4.62 <br /> 1,1-Dichloroethane NO 104 102 1.94 <br /> 1,2-Dichloroethane ND 108 107 -93 <br /> 1,2-Dichlorobenzene ND 105 103 1.92 <br /> 1,3-Dichlorobenzene ND 106 104 1.9 <br /> 1,4-Dichlorobenzene ND 109 107 1.85 <br /> 1,2-Dichloropropane ND 107 102 4.78 <br /> cis-1,3-Dichloropropylene ND 96.1 92.6 3 .71 <br /> trans-1,3-Dichloropropylene ND 97.8 94.6 3.33 <br /> Methylene Chloride ND 109 106 2.79 <br /> 1,1, 2,2-Tetrachloroethane ND Ile 115 2.58 <br /> Tetrachloroethylene ND 108 105 2.82 <br /> 1,1,1-Trichloroethane ND 108 103 4.74 <br /> 1, 1,2-Trichloroethane NO 111 107 3 .67 <br /> Trichloroethylene ND 110 105 4 .65 <br /> Trichlorofluoromethane ND 99.8 95.9 3 .99 <br /> Vinyl Chloride ND 99.8 97.4 2.43 <br /> This Batch passes method quality control acceptance criteria. <br /> ND none detected <br /> ezuce z. Gw• 1 rza.L,Ley-�/�7 df/`S' <br /> LtEeratery Di+peter Date ikznted: a/ts/fe-� <br />