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Page 3 <br /> The TDLH level represents a maximum concentration from whic : <br /> one could escape within 30 minutes of respirator failure <br /> without experiencing escape-impairment or irreversible hcwitt� <br /> dawaGe^ IDLH values are not listed for substances that are <br /> potential human carcinogens. <br /> EXPOSURE TABLE <br /> WMaw M21act Koot CtiliLlg Ljoit IDLzH <br /> Benzene 0. 1 ppm (8 hrs) 1 ppm ( 15 min) Carcinogen <br /> Toluene 100 ppm ( 10 hrs) 200 ppm ( 10 min) 2000 ppin <br /> Xylene 100 ppm (8 hrs) 200 ppm ( 10 min) 1000 ppm <br /> Ethyl Benzene 100 ppm (8 hrs) N/A 2000 ppm <br /> Tetraethyl <br /> lead 0^ 0067 ppm N/A 3. 6 pp� <br /> prolonged exposures to conc­ntrations above the limits noted <br /> may affect the central nervous system, cardiovascular sMem, <br /> respiratory system, eyes , skin , kidneys, bones and bone <br /> narrow" Research has shown that benrece is a carc^ rcgen. <br /> � <br /> i <br /> Immediate sy�:p|�cms� of over-exposure i nclpa: eye irrtaOlcn , <br /> nose irritation , Lhrost irritation , neavacke ` nausea , <br /> dizziness, weakness , confusion , ruphoria , nxcitzaent , <br /> staygercd gait7 abnormal pain , resp"rat:ry di0ic"lties , <br /> muscle fatigue` and coma. <br /> In crder to protect against nver-expusure t: these conpount s , <br /> Lhe ^�.�iient air wi � l be �ith a olo*er explosion <br /> jicit/czV]nn content meter and/chandled photo ionizing <br /> detector (PIC) . As sozr as .a.cr concentrations apprccch 75� <br /> cf the exposure limit value, wark will cease until all on- <br /> site personnel have d:rnpd p/'ptscti;e clothing and suitable <br /> 'aspiratory devices. <br /> Pqrsonne) .. pos.rcs to oxcossive job-ralated nazards ar� <br /> expocted On be minims? WsinS these safeguards. <br /> Ii s -nZ `! be :n+el that su.mertim, haat mey initiate weather <br /> ��ress-rc!a�e� prnb!ens an� dccrmase prctuctivity an the job <br /> 90 `e4 apc- S:*e, Co:strucKcns enpervencz with <br /> p:tent ; aly jaswinz cc:taminated soil ari_� <br /> °"� .`r � cverec�rsure :f pprsconeL to gasoline vapor is <br /> urlikely, <br />