Document p0R9rGJJknozbrDL7NZqb3zw

^Tl-1 u h*<v9o"S3Kr f d Er.teroffics Communication to C. E. Gremillion From P. L. Fetzer Date March 9, 1977 Subject Deregulation of the Laboratory Regulated Area The tank car samples are normally analyzed between 08Q0 and 1200 hours each cfay there are shipments. The attached tables I, & II shows the In dividual fixed point monitoring data for the Laboratory during this time period. The four hour, one-hour and highest twenty minute averages are shown for each day that data was available. An asterisk indicates those days when tank cars were leaded. This data shows the higest twenty minute average to be 2.1 ppm, well below the fifteen minute limit of 5.0 ppm. The highest value for any one hour exposure was 1.06 ppm and the four hour value was 0.4-1 ppm. These values indicates t.ne high- exposure previously experienced during the tank car analysis has been corrected. The fixed point monitor hourly summary sheet was examined for January and February. Only six values out of 1416 data points exceed 1 ppm, the highest value being 4.0 ppm. The number of Laboratory dosimeter be ting curing 1976 were tabulated for the time periods, January thru August September thru December and January thru February for 1977. These period correspond to the time Prior end following enclosing-the space above t e vent hood. The data (see table III) shows that no exposures above 1 ppm h s occurred since this corrective step was taken. Based on na evaluation or this reeu1 ate a oo dereculuted. t is ''cccwmonded ,e' Laboratr P. L. Fetzer br cc: u /1u-u L i VVC 000020508 TABLE I LABORATORY FIXED POINT MONITORING DATA VVC 300020509 JuZ (OWOV *--oo NO^tM'-OO CO odceUJ UJ totooiflnoo rmMooOMinuiOinconoa r=d oooomooooooooLrtmmoomooo to ,-- I-- CM*-- >-- OOfsJOJr--^-1-- TABLE I I LABORATORY FIXED POINT MONITOR DATA r-- -- i-- OJ OJ F-- t-- CsJ C\J r--. cn ,-- C\J cc ZOj' CoJ `OoCO UJ o Ijj ooo o oCol f> i-- I-- CO c0oz>01 r-- fl i-- VT oo ro r- c\j CO in i-- *-- <\j o r--.r--.r-. * # * * r-. r-- r-. i-- cj >' * i 'i"iifiNC3i3i-i-- -- i-- -- i-- i-- i j c\j r\i N INI l\l IM <.\J Oj IM ^\J CJ <\J M llj l\J (M M M CM t\J CJ C-J CSJ CM QQ00i51 TABLE III LABORATORY PERSONNEL DOSIMETER DATA \\) a y ,^ :A \A 1976 Jan thru Aug (Before enclosing Hood) -AtKf thru Dec 1977 Jan thru Feb No. Analyzed 20 9 l'1 7 No. Over 1 ppm -------- 3 (1.66 highest 0 4t 3i tO o VVC 000020511