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Alpha Analytical Laboratories Inc. • 860 Waugh Lane, H-1, Ukiah, California 95.482 <br /> (707) 468-0401 <br /> Page 2 <br /> Quality ;Control Report <br /> Method Matrix Duplicate <br /> Blank Spike Spike <br /> l Recovery Recovery . Recovery RPD <br /> o <br /> Chloroform ND 107 112 4 .57 <br /> Chloromethane ND 85 . 3 85 .4 . 117 <br /> Chlorotoluene ND 92 . 5 98 . 7 6 . 49 <br /> Dibromochloromethane - ND ill 124 11. 1 <br /> 1, 1-Dichloroethylene ND 109 111 1. 82 <br /> trans-1, 2-Dichloroethylene ND 98 . 5 101. 2 . 51 <br /> cis-1, 2-Dichloroethylene ND 103 107 3 . 81 <br /> Dichlorodifluoromethane ND 60 . 9 63 . 2 3 . 71 <br /> 1, 1-Dichloroethane ND 102 106 3 . 85 <br /> 1, 2-Dichloroethane ND 113 124 9 . 28 <br /> 1, 2-Dichlorobenzene ND 88 . 9 98 . 1 9 . 84 <br /> 1, 3-Dichlorobenzene ND 86 . 8 94 . 5 8 .49 <br /> 1, 4-Dichlorobenzene ND 87 . 0 96 . 5 10. 4 <br /> 1, 2-Dichloropropane ND 104 114 9. 17 <br /> cis-1, 3-Dichloropropylene ND 103 111 7 . 48 <br /> trans-1, 3-Dichloropropylene ND 109 118 7 . 93 <br /> Methylene Chloride ND 91 . 5 97 . 9 6. 76 <br /> 1, 1, 2, 2-Tetrachloroethane ND 115 . 132 13 . 8 <br /> Tetrachloroethylene ND 113 111 1 . 79 <br /> 1, 1, 1-Trichloroethane ND 113 120 6 . 01 <br /> 1, 1, 2-Trichloroethane ND 112 126 11 . 8 <br /> Trichloroethylene ND 112. 120 6 . 9 <br /> Trichlorofluoromethane ND 106 107 . 939 <br /> Vinyl Chloride ND 89 . 2 91 . 7 2 . 76 <br />' a <br />! This Batch passes method quality control acceptance criteria. <br /> ND = none detected <br /> i <br /> { Bruce L. Gove u� -��- <br /> I <br /> Laboratory Director Date Printed: 2/04/99 <br /> 4 <br />