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FROM Richard W Ely . PHONE NO 707 874 3570 0 Jul 29 1999 02 01AM P07 HS-507 Procedures for field investigations at Underground Spills of Gas and other Petroleum Distillate I National Institute for (lir upattonal Safety and Health (NIOS11) approved full- cM Imi face re44)rr11t0r will ntgatlle val)oi cattridgec Respirators must be warn when airborne hydrocat bon action level% are reached or exceeded 2 Saranex rn polyethylene coated Fyvek coverall-; Coated coveralls must be wc�i it what) product clijantines of fuel are encountered and when fuel-saturated boll 1% handled 3 ,safely goggles of glassc c Mtlst be worn when working within 10 feet of ttlmt ating heavy equipment (e g , drill rip, ha(.khoe) Mt1%t be splash-proof when handling f mitenttated fuel produt,t 4 Nitttle of neoprene glove% fat 111 fuck CxcrlYt Inelltartvl wolkers handling rttcthanol nzutit wear butyl glove% Uloves nul%t lxx, wom when handitnl* contaminated soil of walet o) when drtWng of diggutg ul(o cotltanimated ,lel Confirm with your )ISM the applicability est model and brand of glove%+ 4 Neoprene or butyl rtthber safety boot%, calf-length Mutt be worn when walkutr on obvtou%ly (ontaninutc d soil and when working within 10 feat of opor.11111V heavy equipment 6 1 lard hat Must be worn when wotktng within 10 feat 01 aperatU) 11c,1vy cclutlMnt nt 507.9 ORGANIC VAPOR MONITORING 507 9.1 monitoring Instruments Two InStFuntcrit% ate reiltured foi tlu% wcnrk 1) tbTnbw)fl alt: Ga%/O\ygen utdtLator WGI/02) with readout in 111c Lower Lxplo,rve Linin (I t'l.) Mid %02 - 2) Photolonr7;10011 (PID) field survey uistrunirnt ()INU, Thermo Environmental 580A 1'hotova( Mrcroup rat equivalent)*, or, Flame ionization (1-ID) field sutvcy tnetrurncnt (l-oxbnio OVA t)r equivalent) "11113 ne%trumrnt%cannot tcadtly detect methanol, and thrrefnje may NOT be u%cd on %ttc% wlitstc methanol e%or may be e'rtLountered 507.9.2 Toxicity Action Levels The toxicity lection levels given below we tet to e,nrnnly with Occupational Safety and Ilrtlth Administration (OS11A) PeTITdSSible Exposure Levek and AC GIII Threshold Limit Values (71,V) (Insolmc avec age=s approximately I% brn7enc Therefore, for fuel~ which may c ontlttn K-11 IC, the action levels specified below are also hit to comply Willi the pioposed TI,V of 0 1 ppm I hccc action level-, are also adju%ted for the relative respwtse of c oamiott 11113 or FID tn%tr unwah to motor f11e1 vapors Itr%p1r,eto1% must be worn when 111clet readings averaged over 10 minute% equ.11 of cu"d the action level foi upgrade to Level C PPI- W01-1%e)s must be evacuated from the arra whc» cu gawk v.ipi)r e.onerntraliont 0xcrrd"19 lespuatory ptotective; equipment pratr01U11 IAL(01% ate enc attntcrerl OPPRATING PROCEDURE �oaewm�'in miclowll Intprfmf LxpiviY.4 MAIL VIII, ,1 i