Table AC1 - Permissible Exposure LIMITS FOR CHEMICAL CONTAMINANTS

<body BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#800080" ALINK="#FF0000"> <style type="text/css"> </style> <body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> <p align="CENTER">TABLE AC-1 <a href="ac1.pdf" target="_blank">(printable .pdf file 128K)</a><br> PERMISSIBLE EXPOSURE LIMITS FOR CHEMICAL CONTAMINANTS </p> <div align="center"><center> <table width="700" border="0" cellspacing="1" cellpadding="1" align="CENTER"> <tr> <td rowspan="2" align="left" valign="BOTTOM" width="80" height="56"><i>Chemical <br> Abstracts <br> Registry <br> Number </i><sup>(a)</sup> </td> <td rowspan="2" align="CENTER" valign="BOTTOM" nowrap width="40" ><i>Skin</i><sup>(b)</sup></td> <td rowspan="2" colspan = "2" align="center" valign="bottom" nowrap width="300" ><i>Name</i><sup>(c)</sup></td> <td rowspan ="1" colspan="2" align="center" valign="bottom" nowrap width="95" ><i>PEL</i> <sup>(d)</sup><br><hr></td> <td> </td> <td rowspan="1" colspan="2" align="center" valign="bottom" nowrap width="95" ><i>STEL</i> <sup>(o)</sup><br><hr></td> </tr> <tr> <td align="LEFT" valign="bottom" nowrap width="33" height="19"><i>ppm</i><sup>(e)</sup></td> <td align="LEFT" valign="bottom" nowrap width="42" height="19"><i>mg/M</i><sup>3(f)</sup></td> <td align="LEFT" valign="bottom" nowrap width="53" height="19"><i>Ceiling</i><sup>(g)</sup></td> <td align="LEFT" valign="bottom" nowrap width="53" height="19"><i>ppm</i><sup>(e)</sup></td> <td align="LEFT" valign="bottom" nowrap width="42" height="19"><i>mg/M</i><sup>3(f)</sup></td> </tr> <tr> <td colspan="9" align="CENTER" height="5"> <hr> </td> </tr> <tr> <td align="left"> 75070</td> <td> </td> <td colspan="2" align="left" valign="bottom">Acetaldehyde</td> <td>25</td> <td>45</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 64197</td> <td> </td> <td colspan="2" align="left">Acetic acid</td> <td>10</td> <td>25</td> <td>40 ppm</td> <td>15</td> <td>37</td> </tr> <tr> <td align="left"> 108247</td> <td> </td> <td colspan="2" align="left">Acetic Anhydride</td> <td>5</td> <td>20</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 67641</td> <td> </td> <td colspan="2" align="left">Acetone</td> <td>500</td> <td>1200</td> <td>3000 ppm </td> <td>750</td> <td>1780</td> </tr> <tr> <td align="left"> 75868</td> <td> </td> <td colspan="2" align="left">Acetone cyanohydrin as CN</td> <td>4.7</td> <td>5</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75058</td> <td>S</td> <td colspan="2" align="left">Acetonitrile</td> <td>40</td> <td>70</td> <td> </td> <td>60</td> <td>105</td> </tr> <tr> <td align="left"> 98862</td> <td> </td> <td colspan="2" align="left">Acetophenone</td> <td>10</td> <td>49</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 53963</td> <td>S</td> <td colspan="2" align="left">2-Acetylaminofluorene; N-fluoren-2-yl acetamide;</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74862</td> <td> </td> <td colspan="2" align="left">Acetylene</td> <td>(h)</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 540590</td> <td> </td> <td colspan="2" align="left">Acetylene dichloride; see 1,2-Dichloroethylene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 79276</td> <td> </td> <td colspan="2" align="left">Acetylene tetrabromide:1,1,2,2-tetrabromoethane </td> <td>1</td> <td>14</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 79345</td> <td> </td> <td colspan="2" align="left">Acetylene tetrachloride; see 1,1,2,2-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Tetrachloroethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 50782</td> <td> </td> <td colspan="2" align="left">Acetylsalicylic acid (Aspirin) </td> <td> </td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107028</td> <td>S</td> <td colspan="2" align="left">Acrolein</td> <td>0.1</td> <td>0.25</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 79061</td> <td>S</td> <td colspan="2" align="left">Acrylamide</td> <td>--</td> <td>0.03 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 79107</td> <td>S</td> <td colspan="2" align="left">Acrylic acid</td> <td>2</td> <td>5.9</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107131</td> <td>S</td> <td colspan="2" align="left">Acrylonitrile; see Section 5213</td> <td>2</td> <td>4.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 124049</td> <td> </td> <td colspan="2" align="left">Adipic acid</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111693</td> <td>S</td> <td colspan="2" align="left">Adiponitrile</td> <td>2</td> <td>8.8</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 309002</td> <td>S</td> <td colspan="2" align="left">Aldrin; 1,2,3,4,10,10-hexachloro-1,4,4a,5,8,8a-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">hexahydro-endo-1,2-exo-5,8-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> dimethanonaphthalene</td> <td>--</td> <td>0.25</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107186</td> <td>S</td> <td colspan="2" align="left">Allyl alcohol</td> <td>0.5</td> <td>1.25</td> <td> </td> <td>4</td> <td>10</td> </tr> <tr> <td align="left"> 107051</td> <td> </td> <td colspan="2" align="left">Allyl chloride </td> <td>1</td> <td>3</td> <td> </td> <td>2</td> <td>6</td> </tr> <tr> <td align="left"> 106923</td> <td>S</td> <td colspan="2" align="left">Allyl glycidyl ether; AGE</td> <td>5</td> <td>22</td> <td> </td> <td>10</td> <td>44</td> </tr> <tr> <td align="left"> 2179591</td> <td> </td> <td colspan="2" align="left">Allyl propyl disulfide</td> <td>2</td> <td>12</td> <td> </td> <td>3</td> <td>18</td> </tr> <tr> <td align="left"> 1344281</td> <td> </td> <td colspan="2" align="left">Alumina; see Particulates not otherwise regulated </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Aluminum, alkyls (not otherwise classified) </td> <td>--</td> <td>2 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Aluminum soluble salts</td> <td>--</td> <td>2 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Aluminum metal and oxide</td> <td>--</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Total dust</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Respirable fraction<sup>(n)</sup></td> <td>--</td> <td>5<sup>(n)</sup></td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Aluminum pyro powders</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Aluminum welding fumes</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 300925</td> <td> </td> <td colspan="2" align="left">Aluminum distearate</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7047849</td> <td> </td> <td colspan="2" align="left">Aluminum stearate</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 637127</td> <td> </td> <td colspan="2" align="left">Aluminum tristearate</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1300738</td> <td> </td> <td colspan="2" align="left">Aminodimethylbenzene; see Xylidene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 92671</td> <td>S</td> <td colspan="2" align="left">4-Aminodiphenyl; see Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 141435</td> <td> </td> <td colspan="2" align="left">2-Aminoethanol; see Ethanolamine</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 91598</td> <td> </td> <td colspan="2" align="left">2-Aminonapthalene; see beta-Naphthylamine,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 504290</td> <td> </td> <td colspan="2" align="left">2-Aminopyridine</td> <td>0.5</td> <td>2 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 61825</td> <td> </td> <td colspan="2" align="left">Amitrole</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7664417</td> <td> </td> <td colspan="2" align="left">Ammonia</td> <td>25</td> <td>18</td> <td> </td> <td>35</td> <td>27</td> </tr> <tr> <td align="left"> 3825261</td> <td>S</td> <td colspan="2" align="left">Ammonium perfluorooctanoate </td> <td>--</td> <td>00.1 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 12125029</td> <td> </td> <td colspan="2" align="left">Ammonium chloride fume</td> <td>--</td> <td>10</td> <td> </td> <td>--</td> <td>20</td> </tr> <tr> <td align="left"> 1002897</td> <td> </td> <td colspan="2" align="left">Ammonium stearate</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7773060</td> <td> </td> <td colspan="2" align="left">Ammonium sulfamate</td> <td>--</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Total dust</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Respirable fraction<sup>(n)</sup></td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 620111</td> <td> </td> <td colspan="2" align="left">3-Amyl acetate; See Pentyl acetate</td> <td> </td> <td>  </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 628637</td> <td> </td> <td colspan="2" align="left">n-Amyl acetate; See Pentyl acetate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 626380</td> <td> </td> <td colspan="2" align="left">sec-Amyl acetate (all isomers and mixtures); See Pentyl acetate</td> <td> </td> <td>  </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 625161</td> <td> </td> <td colspan="2" align="left">tert-Amyl acetate; See Pentyl acetate</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 62533</td> <td>S</td> <td colspan="2" align="left">Aniline</td> <td>2</td> <td>7.6</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 29191524</td> <td>S</td> <td colspan="2" align="left">Anisidine (ortho and para isomers)</td> <td>0.1</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Antimony and compounds, as Sb</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 86884</td> <td> </td> <td colspan="2" align="left">ANTU; 1-(1-naphthyl)-2-thiourea; Bantu; Rattrack </td> <td>--</td> <td>0.3</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440371</td> <td> </td> <td colspan="2" align="left">Argon</td> <td>(h)</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440382</td> <td> </td> <td colspan="2" align="left">Arsenic and inorganic arsenic compounds; see also</td> <td> </td> <td>0.01</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Section 5214</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Arsenic, organic compounds, as As</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7784421</td> <td> </td> <td colspan="2" align="left">Arsine; AsH<sub>3</sub></td> <td>0.05</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1332-21-4</td> <td> </td> <td colspan="2" align="left">Asbestos (including actinolite, amosite</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">anthophyllite, chrysotile, crocidolite, and tremolite);</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">see Section 5208</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 8052424</td> <td> </td> <td colspan="2" align="left">Asphalt (petroleum) fumes</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1912249</td> <td> </td> <td colspan="2" align="left">Atrazine</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 86500</td> <td>S</td> <td colspan="2" align="left">Azinphos methyl; o,o-dimethyl S-(4-oxo-1,2,3-</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> benzotriazin-3(4H)-ylmethyl) phosphorodithioate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 3333526</td> <td>S</td> <td colspan="2" align="left">2,2'-Azobisisobutyronitrile decomposition product,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see Tetramethyl succinonitrile</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440393</td> <td> </td> <td colspan="2" align="left">Barium, soluble compounds, as Ba</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7727437</td> <td> </td> <td colspan="2" align="left">Barium sulfate; see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 17804352</td> <td> </td> <td colspan="2" align="left">Benomyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Total dust</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Respirable fraction<sup>(n)</sup></td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 71432</td> <td>S</td> <td colspan="2" align="left">Benzene; see also Section 5218</td> <td>1</td> <td> </td> <td> </td> <td>5</td> <td>--</td> </tr> <tr> <td align="left"> 92875</td> <td>S</td> <td colspan="2" align="left">Benzidine; 4,4'-diaminobiphenyl, see Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 71432</td> <td> </td> <td colspan="2" align="left">Benzol; see Benzene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106514</td> <td> </td> <td colspan="2" align="left">D-Benzoquinone; see Quinone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 98884</td> <td> </td> <td colspan="2" align="left">Benzoyl chloride</td> <td>0.2</td> <td>1.1</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 94360</td> <td> </td> <td colspan="2" align="left">Benzoyl peroxide; dibenzoyl peroxide</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 140114</td> <td> </td> <td colspan="2" align="left">Benzyl acetate</td> <td>10</td> <td>61</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 100447</td> <td> </td> <td colspan="2" align="left">benzyl chloride; alpha-chlorotoluene</td> <td>1</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">7440417</td> <td> </td> <td colspan="2" align="left">Beryllium, and beryllium compounds as Be</td> <td>--</td> <td>0.0002</td> <td>0.025mg/M<sup>3</sup></td> <td>--</td> <td> </td> </tr> <tr> <td align="left"> 92524</td> <td> </td> <td colspan="2" align="left">Biphenyl; diphenyl; phenylbenzene</td> <td>0.2</td> <td>1.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 542881</td> <td> </td> <td colspan="2" align="left">Bis(chloromethyl) ether, see bis-Chloromethyl ether,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 3033623</td> <td>S</td> <td colspan="2" align="left">Bis (Dimethylaminoethyl) ether (DMAEE)</td> <td>0.05</td> <td>0.328</td> <td> </td> <td>0.15</td> <td>0.983</td> </tr> <tr> <td align="left"> 1304821</td> <td> </td> <td colspan="2" align="left">Bismuth telluride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Total dust</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Respirable fraction<sup>(n)</sup></td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Bismuth telluride (selenium-doped)</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Borates, tetra, sodium salts</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Anhydrous</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Decahydrate</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Pentahydrate</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1303862</td> <td> </td> <td colspan="2" align="left">Boron oxide</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 10294334</td> <td> </td> <td colspan="2" align="left">Boron tribromide</td> <td>1</td> <td>10</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7637072</td> <td> </td> <td colspan="2" align="left">Boron trifluoride</td> <td>1</td> <td>3</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 314409</td> <td> </td> <td colspan="2" align="left">Bromacil</td> <td>1</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7726956</td> <td> </td> <td colspan="2" align="left">Bromine</td> <td>0.1</td> <td>0.7</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7789302</td> <td> </td> <td colspan="2" align="left">Bromine pentafluoride</td> <td>0.1</td> <td>0.7 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74975</td> <td> </td> <td colspan="2" align="left">Bromochloromethane; see Chlorobromethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74964</td> <td> </td> <td colspan="2" align="left">Bromoethane; see Ethyl bromide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75252</td> <td>S</td> <td colspan="2" align="left">Bromoform; tribromomethane</td> <td>0.5</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74839</td> <td> </td> <td colspan="2" align="left">Bromomethane, see Methyl bromide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75638</td> <td> </td> <td colspan="2" align="left">Bromotrifluoromethane; see Trifluorobromomethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106990</td> <td> </td> <td colspan="2" align="left">1,3-Butadiene (see also section 5201) </td> <td>1</td> <td>2.2</td> <td> </td> <td>5</td> <td>11</td> </tr> <tr> <td align="left"> 106978</td> <td> </td> <td colspan="2" align="left">Butane </td> <td>800</td> <td>1,900</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109795</td> <td> </td> <td colspan="2" align="left">1-Butanethiol; see Butyl mercaptan</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 71363</td> <td> </td> <td colspan="2" align="left">1-Butanol; see n-Butyl alcohol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78933</td> <td> </td> <td colspan="2" align="left">2-Butanone; see Methyl ethyl ketone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111762</td> <td>S</td> <td colspan="2" align="left">2-Butoxyethanol (EGBE)</td> <td>20</td> <td>97</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123864</td> <td> </td> <td colspan="2" align="left">n-Butyl acetate</td> <td>150</td> <td>710</td> <td> </td> <td>200</td> <td>950</td> </tr> <tr> <td align="left"> 105464</td> <td> </td> <td colspan="2" align="left">sec-Butyl acetate</td> <td>200</td> <td>950</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 540885</td> <td> </td> <td colspan="2" align="left">tert-Butyl acetate</td> <td>200</td> <td>950</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 141322</td> <td> </td> <td colspan="2" align="left">Butyl acrylate</td> <td>2</td> <td>11</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 71363</td> <td>S</td> <td colspan="2" align="left">n-Butyl alcohol; 1-butanol</td> <td>50</td> <td>150</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78922</td> <td> </td> <td colspan="2" align="left">sec-Butyl alcohol</td> <td>100</td> <td>305</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75650</td> <td> </td> <td colspan="2" align="left">tert-Butyl alcohol</td> <td>100</td> <td>300</td> <td> </td> <td>150</td> <td>450</td> </tr> <tr> <td align="left"> 109739</td> <td>S</td> <td colspan="2" align="left">Butylamine</td> <td>5</td> <td>15</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1189851</td> <td>S</td> <td colspan="2" align="left">tert-Butyl chromate; di-tert-butyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> chromate, as CrO<sub>3</sub></td> <td>--</td> <td>0.1</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">                 as Cr</td> <td> </td> <td>0.005</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td>  (see also Sections 1532.2, 5206 & 8359)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2426086</td> <td> </td> <td colspan="2" align="left">n-Butyl glycidyl ether; BGE;</td> <td>25</td> <td>135</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1-butoxy-2,3-epoxypropane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 138227</td> <td> </td> <td colspan="2" align="left">n-Butyl lactate</td> <td>5</td> <td>25</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109795</td> <td> </td> <td colspan="2" align="left">n-Butyl mercaptan</td> <td>0.5</td> <td>1.5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 89725</td> <td>S</td> <td colspan="2" align="left">o-sec-Butylphenol</td> <td>5</td> <td>30</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 98511</td> <td> </td> <td colspan="2" align="left">p-tert-Butyltoluene</td> <td>1</td> <td>6.1</td> <td> </td> <td>20</td> <td>120</td> </tr> <tr> <td align="left"> 7440439</td> <td> </td> <td colspan="2" align="left">Cadmium metal dust, as Cd</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> (see also Sections 1532 & 5207)</td> <td>--</td> <td>0.005</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Cadmium, soluble salts, as Cd</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> (see also Sections 1532 & 5207)</td> <td>--</td> <td>0.005</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1306190</td> <td> </td> <td colspan="2" align="left">Cadmium oxide fume, as Cd</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> (see also Sections 1532 & 5207 )</td> <td>--</td> <td>0.005</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7778441</td> <td> </td> <td colspan="2" align="left">Calcium arsenate; see Arsenic,inorganic (see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> also Section 5214)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 471341</td> <td> </td> <td colspan="2" align="left">Calcium carbonate; see Particulates not otherwise regulated</td> <td> </td> <td>-- </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 156627</td> <td> </td> <td colspan="2" align="left">Calcium cyanamide</td> <td>--</td> <td>0.5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1305620</td> <td> </td> <td colspan="2" align="left">Calcium hydroxide</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1305788</td> <td> </td> <td colspan="2" align="left">Calcium oxide</td> <td>--</td> <td>2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Calcium silicate; see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1344952</td> <td> </td> <td colspan="2" align="left">Calcium silicate (synthetic): see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1592230</td> <td> </td> <td colspan="2" align="left">Calcium stearate</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7778189</td> <td> </td> <td colspan="2" align="left">Calcium sulfate; see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76222</td> <td> </td> <td colspan="2" align="left">Camphor (synthetic)</td> <td>--</td> <td>2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 105602</td> <td> </td> <td colspan="2" align="left">Caprolactam dust</td> <td>--</td> <td>1</td> <td> </td> <td>--</td> <td>3</td> </tr> <tr> <td align="left"> 105602</td> <td> </td> <td colspan="2" align="left">Caprolactam vapor</td> <td>5</td> <td>20</td> <td> </td> <td>10</td> <td>40</td> </tr> <tr> <td align="left"> 2425061</td> <td>S</td> <td colspan="2" align="left">Captafol</td> <td>--</td> <td>0.1 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 133062</td> <td> </td> <td colspan="2" align="left">Captan</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 63252</td> <td> </td> <td colspan="2" align="left">Carbaryl; 1-naphthyl N-methylcarbamate</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1563662</td> <td> </td> <td colspan="2" align="left">Carbofuran</td> <td>--</td> <td>0.1 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1333864</td> <td> </td> <td colspan="2" align="left">Carbon black </td> <td>--</td> <td>3.5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 124389</td> <td> </td> <td colspan="2" align="left">Carbon dioxide</td> <td>5,000</td> <td>9,000</td> <td> </td> <td>30,000</td> <td>54,000</td> </tr> <tr> <td align="left"> 75150</td> <td>S</td> <td colspan="2" align="left">Carbon disulfide</td> <td>4</td> <td>12</td> <td>30 ppm</td> <td>12</td> <td>36</td> </tr> <tr> <td align="left"> 630080</td> <td> </td> <td colspan="2" align="left">Carbon monoxide</td> <td>25</td> <td>29</td> <td>200 ppm</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 558134</td> <td> </td> <td colspan="2" align="left">Carbon tetrabromide</td> <td>0.1</td> <td>1.4</td> <td> </td> <td>0.3</td> <td>4</td> </tr> <tr> <td align="left"> 56235</td> <td>S</td> <td colspan="2" align="left">Carbon tetrachloride</td> <td>2</td> <td>12.6</td> <td>200 ppm</td> <td>10</td> <td>63</td> </tr> <tr> <td align="left"> 75445</td> <td> </td> <td colspan="2" align="left">Carbonyl chloride; see Phosgene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 353504</td> <td> </td> <td colspan="2" align="left">Carbonyl fluoride</td> <td>2</td> <td>5</td> <td> </td> <td>5</td> <td>15</td> </tr> <tr> <td align="left"> 120809</td> <td>S</td> <td colspan="2" align="left">Catechol; pyrocatechol</td> <td>5</td> <td>20</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 9004346</td> <td> </td> <td colspan="2" align="left">Cellulose (paper fiber); see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 21351791</td> <td> </td> <td colspan="2" align="left">Cesium hydroxide</td> <td> </td> <td>2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 57749</td> <td>S</td> <td colspan="2" align="left">Chlordane; 1,2,4,5,6,7,8,8-octachloro-3a,4,7,7a-</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> tetrahydro-4,7-methanoindane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 8001352</td> <td>S</td> <td colspan="2" align="left">Chlorinated camphene; toxaphene</td> <td>--</td> <td>0.5</td> <td> </td> <td>--</td> <td>1</td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Chlorinated diphenyl oxide </td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7782505</td> <td> </td> <td colspan="2" align="left">Chlorine</td> <td>0.5</td> <td>1.5</td> <td> </td> <td>1</td> <td>3</td> </tr> <tr> <td align="left"> 10049044</td> <td> </td> <td colspan="2" align="left">Chlorine dioxide</td> <td>0.1</td> <td>0.3</td> <td> </td> <td>0.3</td> <td>0.9</td> </tr> <tr> <td align="left"> 7790912</td> <td> </td> <td colspan="2" align="left">Chlorine trifluoride</td> <td>0.1</td> <td>0.4</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107200</td> <td> </td> <td colspan="2" align="left">Chloroacetaldehyde</td> <td>1</td> <td>3</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78955</td> <td>S</td> <td colspan="2" align="left">Chloroacetone</td> <td>1</td> <td>3.8</td> <td>C </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 532274</td> <td> </td> <td colspan="2" align="left">alpha-Chloroacetophenone;phenacyl chloride</td> <td>0.05</td> <td>0.3 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 79049</td> <td>S</td> <td colspan="2" align="left">Chloroacetyl chloride</td> <td>0.05</td> <td>0.2</td> <td> </td> <td>0.15</td> <td>0.69</td> </tr> <tr> <td align="left"> 108907</td> <td> </td> <td colspan="2" align="left">Chlorobenzene; monochlorobenzene</td> <td>10</td> <td>46</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2698411</td> <td>S</td> <td colspan="2" align="left">o-Chlorobenzylidene malononitrile; OCBM</td> <td>0.05</td> <td>0.4</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74975</td> <td> </td> <td colspan="2" align="left">Chlorobromomethane; bromochloromethane</td> <td>200</td> <td>1,050</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 126998</td> <td>S</td> <td colspan="2" align="left">2-Chloro-1,3-butadiene; see Chloroprene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75456</td> <td> </td> <td colspan="2" align="left">Chlorodifluoromethane; Fluorocarbon 22</td> <td>1,000</td> <td>3,500</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 53469219</td> <td>S</td> <td colspan="2" align="left">Chlorodiphenyl (42% chlorine)</td> <td>--</td> <td>1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 11097691</td> <td>S</td> <td colspan="2" align="left">Chlorodiphenyl (54% chlorine)</td> <td>--</td> <td>0.5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106898</td> <td> </td> <td colspan="2" align="left">1-Chloro-2,3-epoxypropane; see Epichlorohydrin</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75003</td> <td> </td> <td colspan="2" align="left">Chloroethane; see Ethyl chloride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107073</td> <td> </td> <td colspan="2" align="left">2-Chloroethanol; see Ethylene chlorohydrin</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75014</td> <td> </td> <td colspan="2" align="left">Chloroethylene, see Vinyl chloride, Section 5210</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 67663</td> <td> </td> <td colspan="2" align="left">Chloroform; trichloromethane</td> <td>2</td> <td>9.78</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74873</td> <td> </td> <td colspan="2" align="left">Chloromethane, see Methyl chloride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107302</td> <td> </td> <td colspan="2" align="left">Chloromethyl methyl ether; see Methyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> chloromethyl ether, Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 542881</td> <td> </td> <td colspan="2" align="left">bis-Chloromethyl ether, see also Section 5209</td> <td>0.001</td> <td>0.005</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 100005</td> <td> </td> <td colspan="2" align="left">1-Chloro-4-nitrobenzene; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> p-Nitrochlorobenzene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 600259</td> <td> </td> <td colspan="2" align="left">1-Chloro-1-nitropropane</td> <td>2</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76153</td> <td> </td> <td colspan="2" align="left">Chloropentafluoroethane</td> <td>1,000</td> <td>6,320 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76062</td> <td> </td> <td colspan="2" align="left">Chloropicrin; trichloronitromethane</td> <td>0.1</td> <td>0.7</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 126998</td> <td>S</td> <td colspan="2" align="left">Chloroprene; 2-chloro-1,3-butadiene</td> <td>10</td> <td>36 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 598787</td> <td>S</td> <td colspan="2" align="left">2-Chloropropionic acid</td> <td>0.1</td> <td>0.44</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2039874</td> <td> </td> <td colspan="2" align="left">o-Chlorostyrene</td> <td>50</td> <td>285</td> <td> </td> <td>75</td> <td>428</td> </tr> <tr> <td align="left"> 95498</td> <td>S</td> <td colspan="2" align="left">o-Chlorotoluene</td> <td>50</td> <td>250</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1929824</td> <td> </td> <td colspan="2" align="left">2-Chloro-6-(trichloromethyl)pyridine; see Nitrapyrin</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2921882</td> <td>S</td> <td colspan="2" align="left">Chlorpyrifos</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Chromite ore processing (chromate), as Cr</td> <td>--</td> <td>0.005 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td colspan="2" align="left"><td>(see also Sections 1532.2, 5206 & 8359)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440473</td> <td> </td> <td colspan="2" align="left">Chromium metal</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Chromium (II) compounds, as Cr</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Chromium (III) compounds, as Cr</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Chromium (VI) compounds, as Cr</td> <td>--</td> <td>0.005</td> <td>0.1mg/M<sup>3</sup></td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td colspan="2" align="left"><td>(see also Sections 1532.2, 5206 & 8359)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 14977618</td> <td> </td> <td colspan="2" align="left">Chromyl chloride</td> <td>0.025</td> <td>0.15 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2971906</td> <td> </td> <td colspan="2" align="left">Clopidol</td> <td>-- </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Total dust</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td> </td> <td>Respirable fraction</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Coal (Bituminous) dust</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> <5% quartz, respirable fraction<sup>(n)</sup></td> <td>--</td> <td>2 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> >5% quartz, respirable fraction<sup>(n)</sup></td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Coal tar pitch volatiles<sup>(i)</sup></td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440484</td> <td> </td> <td colspan="2" align="left">Cobalt, metal fume and dust, as Co</td> <td>--</td> <td>0.020</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Cobalt carbonyl, as Co</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 16842038</td> <td> </td> <td colspan="2" align="left">Cobalt hydrocarbonyl, as Co</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Coke oven emissions, see Section 5211</td> <td> </td> <td>0.15 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440508</td> <td> </td> <td colspan="2" align="left">Copper metal fume, as Cu</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Copper salts, dusts and mists, as Cu</td> <td>--</td> <td>1 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Corundum, see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Cotton dust, see also Section 5190</td> <td>--</td> <td>1<sup>(j)</sup></td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1319773</td> <td>S</td> <td colspan="2" align="left">Cresol (all isomers)</td> <td>5</td> <td>22 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123739</td> <td>S</td> <td colspan="2" align="left">Crotonaldehyde; beta-methylacrolein</td> <td> </td> <td> </td> <td>0.3</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 4170303</td> <td> </td> <td colspan="2" align="left"> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 299865</td> <td> </td> <td colspan="2" align="left">Crufomate</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 98828</td> <td>S</td> <td colspan="2" align="left">Cumene; isopropylbenzene</td> <td>50</td> <td>245 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 420042</td> <td> </td> <td colspan="2" align="left">Cyanamide</td> <td>--</td> <td>2 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td>S</td> <td colspan="2" align="left">Cyanide, as CN</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 460195</td> <td> </td> <td colspan="2" align="left">Cyanogen</td> <td>10</td> <td>20 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 506774</td> <td> </td> <td colspan="2" align="left">Cyanogen chloride</td> <td>0.3</td> <td>0.6</td> <td>C </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110827</td> <td> </td> <td colspan="2" align="left">Cyclohexane</td> <td>300</td> <td>1,050 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108930</td> <td>S</td> <td colspan="2" align="left">Cyclohexanol</td> <td>50</td> <td>200</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108941</td> <td>S</td> <td colspan="2" align="left">Cyclohexanone</td> <td>25</td> <td>100</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110838</td> <td> </td> <td colspan="2" align="left">Cyclohexene</td> <td>300</td> <td>1,015</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108918</td> <td>S</td> <td colspan="2" align="left">Cyclohexylamine</td> <td>10</td> <td>40</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 121824</td> <td>S</td> <td colspan="2" align="left">Cyclonite; RDX; cyclotrimethylenetrinitramine</td> <td>--</td> <td>1.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 542927</td> <td> </td> <td colspan="2" align="left">Cyclopentadiene</td> <td>75</td> <td>200</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 287923</td> <td> </td> <td colspan="2" align="left">Cyclopentane</td> <td>600</td> <td>1,720</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 13121705</td> <td> </td> <td colspan="2" align="left">Cyhexatin; tricyclohexyltin hydroxide</td> <td> </td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 94757</td> <td> </td> <td colspan="2" align="left">2,4-D;2,4-dichlorophenoxyacetic acid</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 50293</td> <td>S</td> <td colspan="2" align="left">DDT; 1,1,1-trichloro-2,2-bis-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> (p-chlorophenyl)ethane</td> <td>--</td> <td>1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 62737</td> <td> </td> <td colspan="2" align="left">DDVP, see Dichlorvos</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 17702419</td> <td>S</td> <td colspan="2" align="left">Decaborane</td> <td>0.05</td> <td>0.3</td> <td> </td> <td>0.15</td> <td>0.9</td> </tr> <tr> <td align="left"> 8065483</td> <td>S</td> <td colspan="2" align="left">Demeton; a mixture of o,o-diethyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> o-2(ethylthio)ethyl phosphorothloate and</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> o,o'-diethyl S-2(ethylthio)ethyl phosphorothioate</td> <td>0.01</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123422</td> <td> </td> <td colspan="2" align="left">Diacetone alcohol; 4-hydroxy-4-methyl-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 2-pentanone</td> <td>50</td> <td>240</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107153</td> <td> </td> <td colspan="2" align="left">1,2-Diaminoethane; see Ethylenediamine</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Diatomacous earth; see Silica-amorphous</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 333415</td> <td>S</td> <td colspan="2" align="left">Diazinon; o,o-diethyl o-(2-isopropyl-6-</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> methyl-4-pyrimidinyl) phosphorothioate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 334883</td> <td> </td> <td colspan="2" align="left">Diazomethane</td> <td>0.2</td> <td>0.4</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 94360</td> <td> </td> <td colspan="2" align="left">Dibenzoyl peroxide; see Benzoyl peroxide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 19287457</td> <td> </td> <td colspan="2" align="left">Diborane</td> <td>0.1</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2528361</td> <td>S</td> <td colspan="2" align="left">Dibutyl phenyl phosphate</td> <td>0.3</td> <td>3.5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 96128</td> <td> </td> <td colspan="2" align="left">1,2-Dibromo-3-chloropropane; DBCP;</td> <td>.001</td> <td>.01</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see Section 5212</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75616</td> <td> </td> <td colspan="2" align="left">Dibromodifluoromethane; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Difluorodibromomethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106934</td> <td>S</td> <td colspan="2" align="left">1,2-Dibromomethane; see Ethylene dibromide,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Section 5219</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 102818</td> <td>S</td> <td colspan="2" align="left">2-N-Dibutylaminoethanol</td> <td>2</td> <td>14</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107664</td> <td> </td> <td colspan="2" align="left">Dibutyl phosphate</td> <td>1</td> <td>5</td> <td> </td> <td>2</td> <td>10</td> </tr> <tr> <td align="left"> 84742</td> <td> </td> <td colspan="2" align="left">Dibutyl phthalate</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7572294</td> <td> </td> <td colspan="2" align="left">Dichloroacetylene</td> <td>0.1</td> <td>0.4</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 95501</td> <td>S</td> <td colspan="2" align="left">o-Dichlorobenzene</td> <td>25</td> <td>150</td> <td>50 ppm</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106467</td> <td> </td> <td colspan="2" align="left">p-Dichlorobenzene; 1,4-dichlorobenzene</td> <td>10</td> <td>60</td> <td>200 ppm</td> <td>110</td> <td>675</td> </tr> <tr> <td align="left"> 91941</td> <td>S</td> <td colspan="2" align="left">3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> dichlorobiphenyl; see Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 764410</td> <td>S</td> <td colspan="2" align="left">1,4 -Dichloro-2-butene</td> <td>0.005</td> <td>0.025</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75718</td> <td> </td> <td colspan="2" align="left">Dichlorodifluoromethane</td> <td>1000</td> <td>4950</td> <td>6200 ppm</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 118525</td> <td> </td> <td colspan="2" align="left">1,3-Dichloro-5,5-dimethyl hydantoin</td> <td>--</td> <td>0.2</td> <td> </td> <td>--</td> <td>0.4</td> </tr> <tr> <td align="left"> 75343</td> <td> </td> <td colspan="2" align="left">1,1-Dichloroethane</td> <td>100</td> <td>400</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107062</td> <td> </td> <td colspan="2" align="left">1,2-Dichloroethane, see Ethylene dichloride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75354</td> <td> </td> <td colspan="2" align="left">1,1-Dichloroethylene; see Vinylidene chloride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 540590</td> <td> </td> <td colspan="2" align="left">1,2-Dichloroethylene; acetylene dichloride</td> <td>200 </td> <td>790 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111444</td> <td>S</td> <td colspan="2" align="left">Dichloroethyl ether; bis(2-chloroethyl) ether</td> <td>5 </td> <td>30</td> <td> </td> <td>10</td> <td>60</td> </tr> <tr> <td align="left"> 75434</td> <td> </td> <td colspan="2" align="left">Dichlorofluoromethane; Fluorocarbon 21</td> <td>10</td> <td>42</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75092</td> <td> </td> <td colspan="2" align="left">Dichloromethane; see Methylene chloride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 594729</td> <td> </td> <td colspan="2" align="left">1,1-Dichloro-1-nitroethane</td> <td>2</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78875</td> <td> </td> <td colspan="2" align="left">1,2-Dichloropropane; see Propylene dichloride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 542756</td> <td>S</td> <td colspan="2" align="left">Dichloropropene</td> <td>1</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75990</td> <td> </td> <td colspan="2" align="left">2,2-Dichloropropionic acid</td> <td>1</td> <td>6</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76142</td> <td> </td> <td colspan="2" align="left">1,2-Dichlorotetrafluoroethane; Fluorocarbon 114</td> <td>1,000</td> <td>7,000</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 62737</td> <td>S</td> <td colspan="2" align="left">Dichlorvos (DDVP); 2,2-dichlorovinyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> dimethyl phosphate</td> <td>0.1</td> <td>1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 141662</td> <td>S</td> <td colspan="2" align="left">Dicrotophos</td> <td>--</td> <td>0.25</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 5124301</td> <td> </td> <td colspan="2" align="left">Dicyclohexylmethane-4,4'-diisocyanate;</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see Methylene bis-(4-cyclohexylisocyanate)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 77736</td> <td> </td> <td colspan="2" align="left">Dicyclopentadiene</td> <td>5</td> <td>30</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 102545</td> <td> </td> <td colspan="2" align="left">Dicyclopentadienyl iron</td> <td>--</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Total dust</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Respirable fraction<sup>(n)</sup></td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 60571</td> <td>S</td> <td colspan="2" align="left">Dieldrin; 1,2,3,4,10,10-hexachloro-6,7-epoxy-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-exo-5,8-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> dimethanonaphthalene</td> <td>--</td> <td>0.25</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111422</td> <td>S</td> <td colspan="2" align="left">Diethanolamine </td> <td>0.46</td> <td>2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109897</td> <td>S</td> <td colspan="2" align="left">Diethylamine</td> <td>5</td> <td>15</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 112367</td> <td>S</td> <td colspan="2" align="left">Diethylene glycol diethyl ether,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Ethyl diglyme</td> <td>5</td> <td>33 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111966</td> <td>S</td> <td colspan="2" align="left">Diethylene glycol dimethyl ether, Diglyme</td> <td>1</td> <td>5.5</td> <td> </td> <td>5</td> <td>27</td> </tr> <tr> <td align="left"> 100378</td> <td>S</td> <td colspan="2" align="left">2-(Diethylamino) ethanol</td> <td>2</td> <td>9.6</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123911</td> <td> </td> <td colspan="2" align="left">1,4-Diethylene dioxide; see p-Dioxane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111400</td> <td>S</td> <td colspan="2" align="left">Diethylenetriamine</td> <td>1</td> <td>4</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 60297</td> <td> </td> <td colspan="2" align="left">Diethyl ether; see Ethyl ether</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 298044</td> <td> </td> <td colspan="2" align="left">Di-(2-ethylhexyl) phthalate;</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see Di-sec-octyl phthalate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 96220</td> <td> </td> <td colspan="2" align="left">Diethyl ketone</td> <td>200</td> <td>705</td> <td> </td> <td>300</td> <td>1057</td> </tr> <tr> <td align="left"> 84662</td> <td> </td> <td colspan="2" align="left">Diethyl phthalate</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75616</td> <td> </td> <td colspan="2" align="left">Difluorodibromomethane; dibromodifluoromethane</td> <td>100</td> <td>860</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2238075</td> <td> </td> <td colspan="2" align="left">Diglycidyl ether; DGE; bis(2,3-epoxypropyl)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> ether</td> <td>0.1</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123319</td> <td> </td> <td colspan="2" align="left">p-Dihydroxybenzene; see Hydroquinone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108838</td> <td> </td> <td colspan="2" align="left">Diisobutyl ketone; 2,6-dimethyl-4-heptanone</td> <td>25</td> <td>150</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108189</td> <td>S</td> <td colspan="2" align="left">Diisopropylamine</td> <td>5</td> <td>20</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108203</td> <td> </td> <td colspan="2" align="left">Diisopropyl ether; see Isopryl ether</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109875</td> <td> </td> <td colspan="2" align="left">Dimethoxymethane; see Methylal</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 127195</td> <td>S</td> <td colspan="2" align="left">Dimethylacetamide</td> <td>10</td> <td>35</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 124403</td> <td> </td> <td colspan="2" align="left">Dimethylamine</td> <td>5</td> <td>9.2</td> <td> </td> <td>15</td> <td>27.6</td> </tr> <tr> <td align="left"> 60117</td> <td> </td> <td colspan="2" align="left">4-Dimethylaminoazobenzene, see Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1300738</td> <td> </td> <td colspan="2" align="left">Dimethylaminobenzene; see Xylidene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 121697</td> <td>S</td> <td colspan="2" align="left">N,N-Dimethylaniline; dimethylphenylamine</td> <td>5</td> <td>25</td> <td> </td> <td>10</td> <td>50</td> </tr> <tr> <td align="left"> 1330207</td> <td> </td> <td colspan="2" align="left">Dimethylbenzene; see Xylene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108849</td> <td> </td> <td colspan="2" align="left">1,3-Dimethylbutyl acetate; see sec-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Hexyl acetate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 300765</td> <td> </td> <td colspan="2" align="left">o,o-Dimethyl o-(1,2-dibromo-2,2-dichloroethyl)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> phosphate; see Naled</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 14857342</td> <td> </td> <td colspan="2" align="left">Dimethylethoxysilane</td> <td>0.5</td> <td>2.1</td> <td> </td> <td>1.5</td> <td>6.4</td> </tr> <tr> <td align="left"> 68122</td> <td>S</td> <td colspan="2" align="left">Dimethylformamide; DMF</td> <td>10</td> <td>30</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108838</td> <td> </td> <td colspan="2" align="left">2,6-Dimethyl-4-heptanone; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Diisobutyl ketone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 57147</td> <td>S</td> <td colspan="2" align="left">1,1-Dimethylhydrazine</td> <td>0.01</td> <td>0.025</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 67641</td> <td> </td> <td colspan="2" align="left">Dimethyl ketone; see Acetone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 62759</td> <td> </td> <td colspan="2" align="left">N,N-Dimethylnitrosamine; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> N-Nitrosodimethylamine, Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 131113</td> <td> </td> <td colspan="2" align="left">Dimethyl phthalate</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 77781</td> <td>S</td> <td colspan="2" align="left">Dimethyl sulfate; methyl sulfate</td> <td>0.1</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 148016</td> <td> </td> <td colspan="2" align="left">Dinitolmide; 3,5-Dinitro-o-toluamide</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 528290,</td> <td>S</td> <td colspan="2" align="left">Dinitrobenzene (all (isomers)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 99650,</td> <td> </td> <td width="10"></td> <td align="left"> ortho, meta and</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 100254</td> <td> </td> <td width="10"></td> <td align="left"> para isomers</td> <td>0.15</td> <td>1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 534521</td> <td>S</td> <td colspan="2" align="left">4,6-Dinitro-o-cresol; 2-methyl-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 4,6-dinitrophenol</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 25321146</td> <td>S</td> <td colspan="2" align="left">2,4-Dinitrotoluene</td> <td>--</td> <td>0.15</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123911</td> <td>S</td> <td colspan="2" align="left">p-Dioxane, tech. grade;</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,4-dioxacyclohexane;</td> <td>25 </td> <td>90</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,4-diethylene dioxide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78342</td> <td>S</td> <td colspan="2" align="left">Dioxathion</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 92524</td> <td> </td> <td colspan="2" align="left">Diphenyl; see Biphenyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 122394</td> <td> </td> <td colspan="2" align="left">Diphenylamine; N-phenylaniline</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 101688</td> <td> </td> <td colspan="2" align="left">Diphenylmethane diisocyanate; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Methylene bis(phenylisocyanate)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123193</td> <td> </td> <td colspan="2" align="left">Dipropyl ketone</td> <td>50</td> <td>235</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 34590948</td> <td>S</td> <td colspan="2" align="left">Dipropylene glycol methyl ether</td> <td>100</td> <td>600</td> <td> </td> <td>150</td> <td>900</td> </tr> <tr> <td align="left"> 85007</td> <td> </td> <td colspan="2" align="left">Diquat; 1,1'-ethylene-2,2'-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> dipyridinium dibromide</td> <td>--</td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Total dust</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">Respirable fraction<sup>(n)</sup></td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 117817</td> <td> </td> <td colspan="2" align="left">Di-sec-octyl phthalate; bis(2 ethylhexyl) phthalate</td> <td>--</td> <td>5</td> <td> </td> <td>--</td> <td></td> </tr> <tr> <td align="left"> 97778</td> <td> </td> <td colspan="2" align="left">Disulfiram</td> <td>--</td> <td>2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 298044</td> <td>S</td> <td colspan="2" align="left">Disulfoton; o,o-diethyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td> </td> <td align="left">S-2-(ethylthio)ethyl phosphorodithioate</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 128370</td> <td> </td> <td colspan="2" align="left">2,6-Di-tert-butyl-p-cresol</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 330541</td> <td> </td> <td colspan="2" align="left">Diuron</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 68122</td> <td> </td> <td colspan="2" align="left">DMF; see Dimethylformamide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 57147</td> <td> </td> <td colspan="2" align="left">DMH; see 1,1-Dimethylhydrazine</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1321740</td> <td> </td> <td colspan="2" align="left">Divinyl benzene</td> <td>10</td> <td>50</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Dust, nuisance dust and particulates,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 12415348</td> <td> </td> <td colspan="2" align="left">Emery; see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 115297</td> <td>S</td> <td colspan="2" align="left">Endosulfan; 6,7,8,9,10,10-hexachloro-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 3-benzodioxathiepin-3-oxide</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 72208</td> <td>S</td> <td colspan="2" align="left">Endrin; 1,2,3,4,10,10-hexachloro-6,7-epoxy-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-endo-5,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 8-dimethanonaphthalene</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 13838169</td> <td> </td> <td colspan="2" align="left">Enflurane</td> <td>2</td> <td>15</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106898</td> <td>S</td> <td colspan="2" align="left">Epichlorohydrin; 1-chloro-2,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">3-epoxypropane</td> <td>0.05</td> <td>0.19</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 2104645</td> <td>S</td> <td colspan="2" align="left">EPN; o-ethyl o-(p-nitrophenyl)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> phenylphosphonothioate</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75569</td> <td> </td> <td colspan="2" align="left">1,2-Epoxypropane; see Propylene oxide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 556525</td> <td> </td> <td colspan="2" align="left">2,3-Epoxypropanol; see Glycidol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74840</td> <td> </td> <td colspan="2" align="left">Ethane</td> <td>(h)</td> <td>--</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75081</td> <td> </td> <td colspan="2" align="left">Ethanethiol; see Ethyl mercaptan</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 64175</td> <td> </td> <td colspan="2" align="left">Ethanol; see Ethyl alcohol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 141435</td> <td> </td> <td colspan="2" align="left">Ethanolamine; 2-aminoethanol</td> <td>3</td> <td>8</td> <td> </td> <td>6</td> <td>15</td> </tr> <tr> <td align="left"> 563122</td> <td>S</td> <td colspan="2" align="left">Ethion</td> <td>--</td> <td>0.4</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110805</td> <td>S</td> <td colspan="2" align="left">2-Ethoxyethanol</td> <td>5</td> <td>18</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111159</td> <td>S</td> <td colspan="2" align="left">2-Ethoxyethyl acetate</td> <td>5</td> <td>27</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 141786</td> <td> </td> <td colspan="2" align="left">Ethyl acetate</td> <td>400</td> <td>1,400</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 140885</td> <td>S</td> <td colspan="2" align="left">Ethyl acrylate</td> <td>5</td> <td>20</td> <td> </td> <td>25</td> <td>100</td> </tr> <tr> <td align="left"> 64175</td> <td> </td> <td colspan="2" align="left">Ethyl alcohol; ethanol</td> <td>1,000</td> <td>1,900</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75047</td> <td>S</td> <td colspan="2" align="left">Ethylamine</td> <td>5</td> <td>9.2</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 541855</td> <td> </td> <td colspan="2" align="left">Ethyl sec-amyl ketone; 5-methyl-3-heptanone</td> <td>25</td> <td>130</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 100414</td> <td> </td> <td colspan="2" align="left">Ethylbenzene</td> <td>100</td> <td>435</td> <td> </td> <td>125</td> <td>545</td> </tr> <tr> <td align="left"> 74964</td> <td>S</td> <td colspan="2" align="left">Ethyl bromide</td> <td>5</td> <td>22</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106354</td> <td> </td> <td colspan="2" align="left">Ethyl butyl ketone; 3-heptanone</td> <td>50</td> <td>230</td> <td> </td> <td>75</td> <td>345</td> </tr> <tr> <td align="left"> 75003</td> <td>S</td> <td colspan="2" align="left">Ethyl chloride; chloroethane</td> <td>100</td> <td>264</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7085850</td> <td></td> <td colspan="2" align="left">Ethyl cyanoacrylate</td> <td>0.2</td> <td>1.02</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 673923</td> <td></td> <td colspan="2" align="left">Ethyl tert-butyl ether</td> <td>5</td> <td>21</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74851</td> <td> </td> <td colspan="2" align="left">Ethylene</td> <td>(h)</td> <td>--</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107073</td> <td>S</td> <td colspan="2" align="left">Ethylene chlorohydrin; 2-chloroethanol</td> <td>1</td> <td>3</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107153</td> <td> </td> <td colspan="2" align="left">Ethylenediamine; 1,2-diaminoethane</td> <td>10</td> <td>25</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 106934</td> <td>S</td> <td colspan="2" align="left">Ethylene dibromide; 1,2-dibromoethane,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see Section 5219</td> <td>0.13</td> <td>1</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107062</td> <td> </td> <td colspan="2" align="left">Ethylene dichloride; 1,2-dichloroethane</td> <td>1</td> <td>4</td> <td>200 ppm</td> <td>2</td> <td>8</td> </tr> <tr> <td align="left"> 107211</td> <td> </td> <td colspan="2" align="left">Ethylene glycol (vapor)</td> <td>40</td> <td>100</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 629141</td> <td>S</td> <td colspan="2" align="left">Ethylene glycol diethyl ether, 1,2-diethoxyethane</td> <td>5</td> <td>24</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110714</td> <td>S</td> <td colspan="2" align="left">Ethylene glycol dimethyl ether,</td> <td>1</td> <td>3.7</td> <td> </td> <td>5</td> <td>18</td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,2-dimethoxyethane, Glyme</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 628966</td> <td>S</td> <td colspan="2" align="left">Ethylene glycol dinitrate</td> <td> </td> <td>(k)</td> <td> </td> <td>--</td> <td>0.1</td> </tr> <tr> <td align="left"> 110805</td> <td>S</td> <td colspan="2" align="left">Ethylene glycol monoethyl ether, see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 2-Ethoxyethanol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109864</td> <td>S</td> <td colspan="2" align="left">Ethylene glycol monomethyl ether, see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 2-Methoxyethanol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110496</td> <td>S</td> <td colspan="2" align="left">Ethylene glycol monomethyl ether acetate;</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> see 2-Methoxyethyl acetate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 151564</td> <td>S</td> <td colspan="2" align="left">Ethyleneimine; see also Section 5209</td> <td>0.5</td> <td>1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75218</td> <td> </td> <td colspan="2" align="left">Ethylene oxide; see Section 5220</td> <td>1</td> <td>2</td> <td> </td> <td>5</td> <td> </td> </tr> <tr> <td align="left"> 60297</td> <td> </td> <td colspan="2" align="left">Ethyl ether </td> <td>400</td> <td>1,200</td> <td> </td> <td>500</td> <td>1500</td> </tr> <tr> <td align="left"> 109944</td> <td> </td> <td colspan="2" align="left">Ethyl formate</td> <td>100</td> <td>300</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75343</td> <td> </td> <td colspan="2" align="left">Ethylidene chloride; see 1,1-Dichloroethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 16219753</td> <td> </td> <td colspan="2" align="left">Ethylidene norbornene</td> <td>5 </td> <td>25 </td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75081</td> <td> </td> <td colspan="2" align="left">Ethyl mercaptan; ethanethiol</td> <td>0.5</td> <td>1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78933</td> <td> </td> <td colspan="2" align="left">Ethyl methyl ketone; see Methyl ethyl ketone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 100743</td> <td>S</td> <td colspan="2" align="left">N-Ethylmorpholine; 4-ethyl-1,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td> </td> <td>4-tetrahydrooxazine</td> <td>5</td> <td>23</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78104</td> <td> </td> <td colspan="2" align="left">Ethyl silicate; tetraethyl silicate</td> <td>10</td> <td>85</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 22224926</td> <td>S</td> <td colspan="2" align="left">Fenamiphos</td> <td> </td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 115902</td> <td> </td> <td colspan="2" align="left">Fensulfothion</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 55389</td> <td>S</td> <td colspan="2" align="left">Fenthion</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 14484641</td> <td> </td> <td colspan="2" align="left">Ferbam; ferric N,N-dimethylthiocarbamate</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 12604589</td> <td> </td> <td colspan="2" align="left">Ferrovanadium dust</td> <td>--</td> <td>1</td> <td> </td> <td>--</td> <td>3</td> </tr> <tr> <td align="left"> 14808607</td> <td> </td> <td colspan="2" align="left">Fibrous glass, see Glass</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Flour dust</td> <td> </td> <td>0.5<sup>(s)</sup></td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Fluorides, as F</td> <td>--</td> <td>2.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7782414</td> <td> </td> <td colspan="2" align="left">Fluorine</td> <td>0.1</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75694</td> <td> </td> <td colspan="2" align="left">Fluorocarbon 11; see Trichlorofluoromethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75718</td> <td> </td> <td colspan="2" align="left">Fluorocarbon 12; see Dichlorodifluoromethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75434</td> <td> </td> <td colspan="2" align="left">Fluorocarbon 21; see Dichlorofluoromethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75456</td> <td> </td> <td colspan="2" align="left">Fluorocarbon 22; see Chlorodifluoromethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76120</td> <td> </td> <td colspan="2" align="left">Fluorocarbon 112; see 1,1,2,2-Tetrachloro-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,2-difluoroethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76131</td> <td> </td> <td colspan="2" align="left">Fluorocarbon 113; see 1,1,2-Trichloro-1,2,2-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> trifluoroethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Fluorocarbon 114; see 1,2-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Dichlorotetrafluoroethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75694</td> <td> </td> <td colspan="2" align="left">Fluorotrichloromethane; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Trichlorofluoromethane</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 944229</td> <td>S</td> <td colspan="2" align="left">Fonofos</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 50000</td> <td> </td> <td colspan="2" align="left">Formaldehyde, see Section 5217</td> <td>0.75</td> <td>--</td> <td> </td> <td>2</td> <td>--</td> </tr> <tr> <td align="left"> 75127</td> <td>S</td> <td colspan="2" align="left">Formamide</td> <td>10</td> <td>18</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 64186</td> <td> </td> <td colspan="2" align="left">Formic acid</td> <td>5</td> <td>9</td> <td> </td> <td>10</td> <td>19</td> </tr> <tr> <td align="left"> 98011</td> <td>S</td> <td colspan="2" align="left">Furfural</td> <td>2</td> <td>8</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 98000</td> <td>S</td> <td colspan="2" align="left">Furfuryl alcohol</td> <td>10</td> <td>40</td> <td> </td> <td>15</td> <td>60</td> </tr> <tr> <td align="left"> 8006619</td> <td> </td> <td colspan="2" align="left">Gasoline</td> <td>300</td> <td>900</td> <td> </td> <td>500</td> <td>1500</td> </tr> <tr> <td align="left"> 7782652</td> <td> </td> <td colspan="2" align="left">Germanium tetrahydride</td> <td>0.2</td> <td>0.6</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Glass, fibrous</td> <td>1.0 f/cc<sub>(q)</sub></td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111308</td> <td> </td> <td colspan="2" align="left">Glutaraldehyde <sup>(t)</sup></td> <td>0.05</td> <td>0.2</td> <td>C<sup>(u)</sup></td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 56815</td> <td> </td> <td colspan="2" align="left">Glycerin mist; see Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123944</td> <td> </td> <td colspan="2" align="left">Glyceryl stearate</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 556525</td> <td> </td> <td colspan="2" align="left">Glycidol; 2,3-epoxy-1-propanol</td> <td>2</td> <td>6.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 111762</td> <td> </td> <td colspan="2" align="left">Glycol monobutyl ether; see 2-Butoxyethanol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110805</td> <td> </td> <td colspan="2" align="left">Glycol monoethyl ether; see 2-Ethoxyethanol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109864</td> <td> </td> <td colspan="2" align="left">Glycol monoethyl ether; see 2-Methoxyethanol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Grain dust (oat, wheat, barley)</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7782425</td> <td> </td> <td colspan="2" align="left">Graphite, natural respirable dust</td> <td> </td> <td>2.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Graphite, synthetic</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Total dust</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Respirable fraction<sup>(n)</sup></td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 13397245</td> <td> </td> <td colspan="2" align="left">Gypsum; Calcium sulfate dihydrate; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440586</td> <td> </td> <td colspan="2" align="left">Hafnium</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 151677</td> <td> </td> <td colspan="2" align="left">Halothane</td> <td>2</td> <td>16</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 822060</td> <td> </td> <td colspan="2" align="left">HDI; see Hexamethylene diisocyanate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440597</td> <td> </td> <td colspan="2" align="left">Helium</td> <td>(h)</td> <td>--</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76448</td> <td>S</td> <td colspan="2" align="left">Heptachlor; 1,4,5,6,7,8,8-hepta-chloro-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 3a,4,7,7a-tetrahydro-4,7-methanoindene</td> <td>--</td> <td>0.05</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 142825</td> <td> </td> <td colspan="2" align="left">n-Heptane</td> <td>400</td> <td>1,600</td> <td> </td> <td>500</td> <td>2000</td> </tr> <tr> <td align="left"> 118741</td> <td>S</td> <td colspan="2" align="left">Hexachlorobenzene</td> <td>--</td> <td>0.002</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 87683</td> <td>S</td> <td colspan="2" align="left">Hexachlorobutadiene</td> <td>0.02</td> <td>0.24 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 77474</td> <td> </td> <td colspan="2" align="left">Hexachlorocyclopentadiene</td> <td>0.01</td> <td>0.11 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 67721</td> <td>S</td> <td colspan="2" align="left">Hexachloroethane; perchloroethane</td> <td>1</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1335871</td> <td>S</td> <td colspan="2" align="left">Hexachloronaphthalene</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 684162</td> <td>S</td> <td colspan="2" align="left">Hexafluoroacetone; 1,1,1,3,3,3-hexafluoro-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 2-propanone</td> <td>0.1</td> <td>0.7</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 822060</td> <td> </td> <td colspan="2" align="left">Hexamethylene diisocyanate; HDI</td> <td>0.005</td> <td>0.034</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110543</td> <td>S</td> <td colspan="2" align="left">n-Hexane</td> <td>50</td> <td>180 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Hexane, other isomers</td> <td>500</td> <td>1800</td> <td> </td> <td>1000</td> <td>3600</td> </tr> <tr> <td align="left"> 124094</td> <td> </td> <td colspan="2" align="left">1,6-Hexanediamine</td> <td>0.5</td> <td>2.3</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 591786</td> <td> </td> <td colspan="2" align="left">2-Hexanone; see Methyl butyl ketone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 592416</td> <td> </td> <td colspan="2" align="left">1-Hexene</td> <td>50</td> <td>180</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108101</td> <td> </td> <td colspan="2" align="left">Hexone; see Methyl isobutyl ketone</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108849</td> <td> </td> <td colspan="2" align="left">sec-Hexyl acetate; 4-methyl-2-pentyl acetate;</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,3-dimethyl-butyl acetate</td> <td>50</td> <td>300</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 107415</td> <td> </td> <td colspan="2" align="left">Hexylene glycol</td> <td>25</td> <td>125</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 302012</td> <td>S</td> <td colspan="2" align="left">Hydrazine</td> <td>0.01</td> <td>0.013</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 10035106</td> <td> </td> <td colspan="2" align="left">Hydrobromic acid; see Hydrogen bromide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7647010</td> <td> </td> <td colspan="2" align="left">Hydrochloric acid; see Hydrogen chloride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74908</td> <td> </td> <td colspan="2" align="left">Hydrocyanic acid; see Hydrogen cyanide</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7664393</td> <td> </td> <td colspan="2" align="left">Hydrofluoric acid; see Hydrogen fluoride</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1333740</td> <td> </td> <td colspan="2" align="left">Hydrogen</td> <td>(h)</td> <td>-- </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 61788327</td> <td> </td> <td colspan="2" align="left">Hydrogenated terphenyls</td> <td>0.5</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 10035106</td> <td> </td> <td colspan="2" align="left">Hydrogen bromide</td> <td>3</td> <td>10</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7647010</td> <td> </td> <td colspan="2" align="left">Hydrogen chloride; muriatic acid</td> <td>5</td> <td>7</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74908</td> <td>S</td> <td colspan="2" align="left">Hydrogen cyanide</td> <td>4.7</td> <td>5</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7664393</td> <td> </td> <td colspan="2" align="left">Hydrogen fluoride, as F</td> <td>3</td> <td>2.5</td> <td> </td> <td>6</td> <td>--</td> </tr> <tr> <td align="left"> 7722841</td> <td> </td> <td colspan="2" align="left">Hydrogen peroxide, as H<sub>2</sub>O<sub>2</sub></td> <td>1</td> <td>1.4</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7783075</td> <td> </td> <td colspan="2" align="left">Hydrogen selenide, as Se</td> <td>0.05</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7783064</td> <td> </td> <td colspan="2" align="left">Hydrogen sulfide</td> <td>10</td> <td>14</td> <td>50 ppm</td> <td>15</td> <td>21</td> </tr> <tr> <td align="left"> 123319</td> <td> </td> <td colspan="2" align="left">Hydroquinone; 1,4-benezendiol</td> <td>--</td> <td>2 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 999611</td> <td>S</td> <td colspan="2" align="left">2-Hydroxypropyl acrylate</td> <td>0.5</td> <td>3</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 95136</td> <td> </td> <td colspan="2" align="left">Indene</td> <td>10</td> <td>48 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7440746</td> <td> </td> <td colspan="2" align="left">Indium</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Indium compounds</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7553562</td> <td> </td> <td colspan="2" align="left">Iodine</td> <td>0.1</td> <td>1</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75478</td> <td> </td> <td colspan="2" align="left">Iodoform</td> <td>0.6</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 4098719</td> <td> </td> <td colspan="2" align="left">IPDI; see Isophorone diisocyanate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1309371</td> <td> </td> <td colspan="2" align="left">Iron oxide fume</td> <td>--</td> <td>5 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 13463406</td> <td> </td> <td colspan="2" align="left">Iron pentacarbonyl, as Fe</td> <td>0.1</td> <td>0.8</td> <td> </td> <td>0.2</td> <td>1.6</td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Iron salts, soluble, as Fe</td> <td>--</td> <td>1 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123922</td> <td> </td> <td colspan="2" align="left">Isoamyl acetate; 3-methylbutyl acetate; see Pentyl acetate </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 123513</td> <td> </td> <td colspan="2" align="left">Isoamyl alcohol; 3-methylbutanol</td> <td>100</td> <td>360</td> <td> </td> <td>125</td> <td>450</td> </tr> <tr> <td align="left"> 110190</td> <td> </td> <td colspan="2" align="left">Isobutyl acetate; 2-methylpropyl acetate</td> <td>150</td> <td>700 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78831</td> <td> </td> <td colspan="2" align="left">Isobutyl alcohol; 2-methylpropanol</td> <td>50</td> <td>150 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 26675467</td> <td> </td> <td colspan="2" align="left">Isoflurane</td> <td>2</td> <td>15 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 26952216</td> <td>S</td> <td colspan="2" align="left">Isooctyl alcohol</td> <td>50</td> <td>270 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78591</td> <td> </td> <td colspan="2" align="left">Isophorone; 3,5,5-trimethyl-2-cyclohexene-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1-one</td> <td>4</td> <td>23</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 4098719</td> <td>S</td> <td colspan="2" align="left">Isophorone diisocyanate; IPDI</td> <td>0.005</td> <td>0.045</td> <td> </td> <td>0.02</td> <td>--</td> </tr> <tr> <td align="left"> 109591</td> <td> </td> <td colspan="2" align="left">Isopropoxyethanol</td> <td>25</td> <td>105 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108214</td> <td> </td> <td colspan="2" align="left">Isopropyl acetate</td> <td>250</td> <td>950</td> <td> </td> <td>310</td> <td>1185 </td> </tr> <tr> <td align="left"> 67630</td> <td> </td> <td colspan="2" align="left">Isopropyl alcohol</td> <td>400</td> <td>980</td> <td> </td> <td>500</td> <td>1225 </td> </tr> <tr> <td align="left"> 75310</td> <td> </td> <td colspan="2" align="left">Isopropylamine</td> <td>5</td> <td>12</td> <td> </td> <td>10</td> <td>24 </td> </tr> <tr> <td align="left"> 768525</td> <td>S</td> <td colspan="2" align="left">N-isopropylaniline</td> <td>2</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108203</td> <td> </td> <td colspan="2" align="left">Isopropyl ether; diisopropyl ether</td> <td>250</td> <td>1,050 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 4016142</td> <td> </td> <td colspan="2" align="left">Isopropyl glycidyl ether; IGE;</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 1,2-epoxy-3-isopropoxypropane</td> <td>50</td> <td>240</td> <td> </td> <td>75</td> <td>360</td> </tr> <tr> <td align="left"> 1332587</td> <td> </td> <td colspan="2" align="left">Kaolin; (respirable dust containing no</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> asbestos and <1% crystaline silica)</td> <td>--</td> <td>2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 463514</td> <td> </td> <td colspan="2" align="left">Ketene; ethenone</td> <td>0.5</td> <td>0.9</td> <td> </td> <td>1.5</td> <td>3 </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Lead arsenate, see Sections 5214 and 5198</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7758976</td> <td> </td> <td colspan="2" align="left">Lead chromate, as Pb</td> <td>--</td> <td>0.02</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> as Cr</td> <td>--</td> <td>0.005 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> (see also Section 5198, 1532.1, 1532.2, 5206 & 8359)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Lead (metallic) and inorganic compounds, dust</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> and fume, as Pb (see also Section 5198 )</td> <td>--</td> <td>0.05</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 78002</td> <td> </td> <td colspan="2" align="left">Lead tetraethyl, see Tetraethyl lead</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75741</td> <td> </td> <td colspan="2" align="left">Lead tetramethyl, see Tetramethyl lead</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1317653</td> <td> </td> <td colspan="2" align="left">Limestone; calcium carbonate; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 58899</td> <td>S</td> <td colspan="2" align="left">Lindane; 1,2,3,4,5,6-hexachlorocyclohexane,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left">gamma isomer</td> <td>--</td> <td>0.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7580678</td> <td> </td> <td colspan="2" align="left">Lithium hydride</td> <td>--</td> <td>0.025</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">L.P.G.; liquefied petroleum gas</td> <td>1,000 </td> <td>1,800</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 4485125</td> <td> </td> <td colspan="2" align="left">Lithium stearate</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 13717005</td> <td> </td> <td colspan="2" align="left">Magnesite; magnesium carbonate; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 1309484</td> <td> </td> <td colspan="2" align="left">Magnesium oxide fume, as Mg</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 557040</td> <td> </td> <td colspan="2" align="left">Magnesium stearate</td> <td>--</td> <td>10 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 121755</td> <td>S</td> <td colspan="2" align="left">Malathion; o,o-dimethyl S-1(1,2-</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> dicarboethyoxyethyl) phosphorodithioate</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108316</td> <td> </td> <td colspan="2" align="left">Maleic anhydride; cis-butenedioic anhydride</td> <td>0.1</td> <td>0.4</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Manganese and compounds, as Mn</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7439965</td> <td> </td> <td colspan="2" align="left">Manganese fume, as Mn</td> <td>--</td> <td>0.2</td> <td> </td> <td>--</td> <td>3 </td> </tr> <tr> <td align="left"> 12079651</td> <td>S</td> <td colspan="2" align="left">Manganese, cyclopentadienyl-tricarbonyl,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> as Mn</td> <td>--</td> <td>0.1</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Manganese tetroxide</td> <td>--</td> <td>0.2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Marble; calcium carbonate; see</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> Particulates not otherwise regulated</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 101779</td> <td>S</td> <td colspan="2" align="left">MDA; see 4,4'-Methylene dianiline</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 101688</td> <td> </td> <td colspan="2" align="left">MDI; see Methylene bis(phenylisocyanate)</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7439976</td> <td>S</td> <td colspan="2" align="left">Mercury alkyls, as Hg</td> <td>--</td> <td>0.01 </td> <td>0.04 mg/M<sup>3</sup></td> <td>--</td> <td>0.03</td> </tr> <tr> <td align="left"> 7439976</td> <td>S</td> <td colspan="2" align="left">Mercury, metallic and inorganic compounds as Hg</td> <td>--</td> <td>0.025</td> <td>0.1 mg/M<sup>3</sup></td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 7439976</td> <td>S</td> <td colspan="2" align="left">Mercury aryl compounds as Hg</td> <td>--</td> <td>0.01</td> <td>C</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 108678</td> <td> </td> <td colspan="2" align="left">Mesitylene; see 1,3,5-Trimethylbenzene</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 141797</td> <td> </td> <td colspan="2" align="left">Mesityl oxide; 4-methyl-3-pentene-2-one</td> <td>15</td> <td>60</td> <td> </td> <td>25</td> <td>100 </td> </tr> <tr> <td align="left"> 79414</td> <td>S</td> <td colspan="2" align="left">Methacrylic acid</td> <td>20</td> <td>70 </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74828</td> <td> </td> <td colspan="2" align="left">Methane</td> <td>(h)</td> <td>-- </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74931</td> <td> </td> <td colspan="2" align="left">Methanethiol; see Methyl mercaptan</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 67561</td> <td> </td> <td colspan="2" align="left">Methanol; see Methyl alcohol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 16752775</td> <td>S</td> <td colspan="2" align="left">Methomyl</td> <td>--</td> <td>2.5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 72435</td> <td> </td> <td colspan="2" align="left">Methoxychlor; 1,1,1-trichloro-2,</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> 2-bis(p-methoxyphenyl)ethane</td> <td>--</td> <td>10</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109864</td> <td>S</td> <td colspan="2" align="left">2-Methoxyethanol</td> <td>5</td> <td>16</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110496</td> <td> </td> <td colspan="2" align="left">2-Methoxyethyl acetate</td> <td>5</td> <td>24</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 76380</td> <td> </td> <td colspan="2" align="left">Methoxyflurane</td> <td>2</td> <td>13</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 150765</td> <td> </td> <td colspan="2" align="left">4-Methoxyphenol</td> <td>--</td> <td>5</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 79209</td> <td> </td> <td colspan="2" align="left">Methyl acetate</td> <td>200</td> <td>610</td> <td> </td> <td>250</td> <td>760</td> </tr> <tr> <td align="left"> 74997</td> <td> </td> <td colspan="2" align="left">Methyl acetylene; propyne</td> <td>1,000</td> <td>1,650</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td colspan="2" align="left">Methyl acetylene-propadiene mixture; MAPP</td> <td>1,000</td> <td>1,800</td> <td> </td> <td>1250</td> <td>2250</td> </tr> <tr> <td align="left"> 96333</td> <td>S</td> <td colspan="2" align="left">Methyl acrylate</td> <td>10</td> <td>35</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 126987</td> <td>S</td> <td colspan="2" align="left">alpha-Methylacrylonitrile</td> <td>1</td> <td>3</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 624419</td> <td></td> <td colspan="2" align="left">2-Methylbutyl acetate; see Pentyl acetate</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 109875</td> <td> </td> <td colspan="2" align="left">Methylal; dimethoxymethane</td> <td>1,000</td> <td>3,100</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 67561</td> <td>S</td> <td colspan="2" align="left">Methyl alcohol; methanol </td> <td>200</td> <td>260</td> <td>1000 ppm</td> <td>250</td> <td>325</td> </tr> <tr> <td align="left"> 74895</td> <td> </td> <td colspan="2" align="left">Methylamine </td> <td>5</td> <td>6.4</td> <td> </td> <td>15</td> <td>19 </td> </tr> <tr> <td align="left"> 108112</td> <td> </td> <td colspan="2" align="left">Methyl amyl alcohol; see Methyl</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> isobutyl carbinol</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 110430</td> <td> </td> <td colspan="2" align="left">Methyl n-amyl ketone; 2-heptanone</td> <td>50</td> <td>235</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 100618</td> <td>S</td> <td colspan="2" align="left">N-Methylaniline; monomethylaniline</td> <td>0.5</td> <td>2</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 95534</td> <td> </td> <td colspan="2" align="left">o-Methylaniline; see o-Toluidine</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74839</td> <td>S</td> <td colspan="2" align="left">Methyl bromide</td> <td>1</td> <td>3.88</td> <td>20 ppm</td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 591786</td> <td>S</td> <td colspan="2" align="left">Methyl butyl ketone; 2-hexanone</td> <td>5</td> <td>20</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 74873</td> <td> </td> <td colspan="2" align="left">Methyl chloride</td> <td>5</td> <td>105</td> <td>300 ppm</td> <td>100</td> <td>210</td> </tr> <tr> <td align="left"> 71556</td> <td> </td> <td colspan="2" align="left">Methyl chloroform; 1,1,1-trichloroethane</td> <td>350</td> <td>1900</td> <td>800 ppm</td> <td>450</td> <td>2450</td> </tr> <tr> <td align="left"> 107302</td> <td> </td> <td colspan="2" align="left">Methyl chloromethyl ether; see Section 5209</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 75058</td> <td> </td> <td colspan="2" align="left">Methyl cyanide; see Acetonitrile</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 137053</td> <td> </td> <td colspan="2" align="left">Methyl 2-cyanoacrylate</td> <td>0.2</td> <td>0.908</td> <td> </td> <td>4</td> <td> </td> </tr> <tr> <td align="left"> 108872</td> <td> </td> <td colspan="2" align="left">Methylcyclohexane</td> <td>400</td> <td>1,600</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 25639423</td> <td> </td> <td colspan="2" align="left">Methylcyclohexanol (meta- and</td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left">  </td> <td> </td> <td width="10"></td> <td align="left"> para-isomer mixture)</td> <td>50</td> <td>235</td> <td> </td> <td> </td> <td> </td> </tr> <tr> <td align="left"> 583608</td> <td>S</td> <td colspan="2" align="left">o-Methylcyclohexanone</td> <td>50</td> <td>230</td> <td> </td> <td>75</td> <td>345</td> </tr> <tr> <td align="left