Document zo95geedGDE0Q4Rp2QqgYLa83

(ccnceo) Interoffice Communication to C. E. Greminion From p. L. Fetzer Date March 9, 1977 subject Deregulation of the Laboratory Regulated Area OZrt/t *//7 7 The tank car samples are normally analyzed between 0800 and 1200 hours each c'ay 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 loaded. 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 0.41 ppm. These values indicates the 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 testing during 1975 were tabulated for the time periods, January thru August, September thru December and January thru February for 1977. These periods correspond to the time prior and following enclosing the space above the vent hood. The data (see table III) shows that no exposures above 1 ppm has occurred since this corrective step was taken. Based on the evaluation of this data, it is recommended that the Laboratory regulated area be deregulated. Mr*** n\ / P. L. Fetzer br cc: JAD-GLF vvc 000020516 r-Wr-OOOr'lDWinulflOOt'JI'Unnonr-r r-^Ti r-- <\J ^ i" -- -- -- CM CM -- CM i-- !-- CVJCO^-r-- CO =j- CM TABLE I IS) * * * +: * * Ht * -K +c CvjntfunDl^CDaiO'-MfOVuVJDNCO^Op'h-LU cvjn'S'LniONCoO'i-- n--i-- ,-- ,-- .-- cm cm cm cm cm cm cm cm cm cm cm m c I<I<IIIIIII{II I II I II I I III |1!I| o, VVC 000020517 r-- O O O -NO^W^OO cocooincooorococoooorMuOLnoincOf'OOO OOOOiOOOCTOOOOOUOUfirJOOioOOO *-- CVJ ^ r* CNJ CNJ CsJ r-- -- p- C'J N r-- tf> CO C'J p- TABLE I I OJ &a CO ;O 2 rfCNvh., o11 I a_ >- Q cTc Ul =3 x ce *-> as coH=cCoOC=Orc l 1 1q ooo CM ooCOT> CM CNJ CO I-- r-- CO CO CM *-- Lfl oo 1-- co 1-- a- cn oooI CO .-- -- CM oCO Lf! t-- -- CM CM -- 1-- K * + -le * *** * * * * 1---rN-rN.r~.(*-^fN-rN.r.r-.c^. r-.f--.c-. 1 1 f~ f-, f~~ I--- 1-^ r-^ r-. r~- r-. r-^ r- r-^ r- r-. r- i--, r-- r^- r~- CO r~- r~- 1-- i~- r-.r-.r-.r-.r-t 1 1 1 1 1 1 1 1 1 l_i_j 1 1 1 1 1 1 1 IO.-- cm ro d- to co P"- CO Ci O I-- CM <QtI-- '-- CM (0 -3- iniSrNOJWt-r-r-f-r-r-t-,-^^ CM CM CM II I I < I 1 I II I I I I 1 II CM CM CM CM CMCNJCNJCMCMCMCMCNJCMCMCNJCNJCMCMCM CM CM CM VVC 000020518 TABLE III LABORATORY PERSONNEL DOSIMETER DATA 1976 Jan thru Aug (Before enclosing Hood) thru Dec 1977 Jan thru Feb No. Analyzed 2,, n')'"**' 9 &&) 4 a) No. Over ) ppm ^*3^ ^0.66 highest vaU X / ^. 4 VVC 000020519