Document DDxkz02vrQaQJE35k3Rgq6jQN

1 HCBZ IN BLOOD BY EXPOSURE AND BY YEARS IN PLANT 1. BY EXPOSURE Group Air Exposure,ppb Engineers Hex SOT 15 10 Shift Supervisors 5 O.T's 0.7-2.5 Concentration in Blood,ppb 30 180 395 45 BY TIME IN PLANT Group Years In Plant Shift Supervisors 10-17 O.S. 's 8-13 S.O.T.'s 3-8 O.T.'s 1-3 Engineer 0.2-2 Control 0 Concentration In Blood,ppb 395 335 180 45 30 5 HCBZ concentration in blood is directly related to time in Plant. CYB/db/11-13-75 \ FT5-)F'^t 1 A' r c ( Table 2 -EXPOSURE BY WORK TYPE (ppb) 0. s. HCE HCBd HCBZ Per/Tet 16.1 3.4 0.8 V5/TCP 17.2 . 5.0 1.4 EDO 23.6 4.0 6.2 S . 0. T HCE HCBd HCBZ Per/Tet 23.4 5.1 2.2 K& 00 Hex Area 91.0 16.3 EDO 47.3 7.0 1.2 0. T. HCE HCBd HCBZ SiijjL-rvi sor HCE HCBd HCBZ AHCL 10.0 0.6 1.7 * S. S. 32.7 6.2 5.4 Roundrran 31.7 5.8 0. 7 Engineer 69.8 5.4 14.7 f ^1 CM EDO 20.0 2.5 TLV to oo too too f\V6 A-O 6. 6. / K.lS/db/ll-l -75 00 CONFTnFNTlAI CONCENTRATIONS OF HCBZ IN AIR AREA SAMPLES 1971 1972 1975 CONTROL ROOM HEX AREA 99 ppb (vol) 198 157 74 3.2 43 Absorption of HCBZ by Benzene from air. CYB/db/11-13-75 HALF LIFE OF HCBZ IN BLOOD AFTER EXPOSURE TERMINATED When Leave Plant 300-400e 300-400e 180e HCBZ Concentration, ppb 1 Year 2 Years 424 231 248 162 There is no immediate drop; decay appears to require at least several years. CYB/db/11-13-75 r0NFir>FNT Al lAj~r~ M/ 'S tL -V it'T ' 3AaJT/ -O, ( f y/z s /a' jo/ v'ta rs t ________ 2- //- c Lit, JMiTH PcA^ur i-to /p+ Hi 131,111 L?0 fijiftouiait' 2- t FA htew.iiit CL/ot~ /UH^e /fc2. 7*1 r . *ttcav m*r f AuFtALi Iflth -g J~/o ! T4*Ui rt,* /r + UtJI./C /$(*,'. /V-r ma < M -?**< 'V<T 7A*** l -' * ^. 7?//'- '*<We V .. ---------------------- 1 Atth*itL CAV/P ______ -______ . ............ * -ryf/Bc r X / 'gsrrt oyr Dgcxy " - //CB& //J Bctop 00 07000^ OONF T Or NT T Ai