Document QJ3LzmMvprxdGm43Vq3GJ3BRo

' Environmental Protection Department South Charleston Plant October 3. 1977 To: Hr e J * L. Worstell cc: Mr. T. D. Epps Mr. C. E. Fry Mr. W. T. Gray Mr. M. E. Griffith Dr. R. W. Holland, Jr. Mr. R. T. Kramer Mr. D. C. Macauley RECEIVED OCT 4 1977 R. N. WHEELER, JR, Mr. H. L. Wise From: C. C. Armstead H. C. Jackson W. C. Young SubJect: Monthly Ambient Historical subject monitoring data and sampling network plot are attached. 80% of all samples collected this month fall In the "None Detected Category". The remainder border on the limit of reliable detection, i.e., ranging from 0.01 to 0.0b ppmv. /nb Attachment AMBIENT AIR VCM MONITOR!NG 1974 - 1975 Sample Location Type Sample Total Samples NO (None Detected) >ND, ^0.5 ppmv 50.5, wtl .0 ppmv 71.0 ppmv Total Samples ND (None Detected) >ND, <0.5 ppmv >0.5, *1.0 ppmv 91.0 ppmv Fence Line Grab - CT (1) 112 - 31 103 - 25 9-6 None None 1976 (2) 94 62 31 1 None Community Grab - CT 299 - 48 285 - 30 14 - 18 None None 121 94 26 1 None *P1ant Grab - CT 807 - 86 671 - 47 115-36 9- 1 12-2 117 75 42 None None 1977 Total Samples 72 ND (None Detected) 43 >ND, <*0.1 ppmv 26 >0.1, <-5 ppmv 3 >0.5, *1.0 ppmv None >1.0 ppmv * None CT is an abbreviation for charcoal tube. 90 51 33 1 None None 135 60 68 7 None None 1. Charcoal adsorption tube sample duration 4 * 6 hours 2. Grab samples discontinued. *The$e samples are taken around the periphery of those units using VCM, t .e., roadways etc. None Detected - <Method sensitivity Grab sample method sensitivity " ^0.05 ppmv Charcoal tube method sensitivity 70 0.01 ppmv (since mid 1976) WCY 9/30/77 UCC 034100