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<span>NIOSH</span> </div> </a> <ul id="toc-NIOSH-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Chemical_regulation_for_permissible_exposure_limits" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Chemical_regulation_for_permissible_exposure_limits"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Chemical regulation for permissible exposure limits</span> </div> </a> <ul id="toc-Chemical_regulation_for_permissible_exposure_limits-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Noise_Exposure" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Noise_Exposure"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Noise Exposure</span> </div> </a> <ul id="toc-Noise_Exposure-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item 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class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%93%D1%80%D0%B0%D0%BD%D0%B8%D1%87%D0%BD%D0%B0_%D1%81%D1%82%D0%BE%D0%B9%D0%BD%D0%BE%D1%81%D1%82" title="Гранична стойност – Bulgarian" lang="bg" hreflang="bg" data-title="Гранична стойност" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/L%C3%ADmit_d%27exposici%C3%B3_permissible" title="Límit d'exposició permissible – Catalan" lang="ca" hreflang="ca" data-title="Límit d'exposició permissible" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Permissible_exposure_limit" title="Permissible exposure limit – Danish" lang="da" hreflang="da" data-title="Permissible exposure limit" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de badge-Q70894304 mw-list-item" title=""><a href="https://de.wikipedia.org/wiki/Permissible_exposure_limit" title="Permissible exposure limit – German" lang="de" hreflang="de" data-title="Permissible exposure limit" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%8C%CF%81%CE%B9%CE%BF_%CE%B5%CF%80%CE%B9%CF%84%CF%81%CE%B5%CF%80%CF%84%CE%AE%CF%82_%CE%AD%CE%BA%CE%B8%CE%B5%CF%83%CE%B7%CF%82" title="Όριο επιτρεπτής έκθεσης – Greek" lang="el" hreflang="el" data-title="Όριο επιτρεπτής έκθεσης" data-language-autonym="Ελληνικά" data-language-local-name="Greek" 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data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Workplace environmental standard</div> <p>The <b>permissible exposure limit</b> (<b>PEL</b> or <b>OSHA PEL</b>) is a <a href="/wiki/Law" title="Law">legal</a> limit in the <a href="/wiki/United_States" title="United States">United States</a> for exposure of an employee to a <a href="/wiki/Chemical_substance" title="Chemical substance">chemical substance</a> or physical agent such as high level noise. Permissible exposure limits were established by the <a href="/wiki/Occupational_Safety_and_Health_Administration" title="Occupational Safety and Health Administration">Occupational Safety and Health Administration</a> (OSHA). Most of OSHA's PELs were issued shortly after adoption of the Occupational Safety and Health (OSH) Act in 1970.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p><a href="/wiki/Regulation_of_chemicals" title="Regulation of chemicals">Chemical regulation</a> is sometimes<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="The text near this tag may need clarification or removal of jargon. (February 2021)">clarification needed</span></a></i>]</sup> expressed in <a href="/wiki/Parts_per_million" class="mw-redirect" title="Parts per million">parts per million</a> (ppm), but often<sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="The text near this tag may need clarification or removal of jargon. (February 2021)">clarification needed</span></a></i>]</sup> in <a href="/wiki/Milligram" class="mw-redirect" title="Milligram">milligrams</a> per <a href="/wiki/Cubic_meter" class="mw-redirect" title="Cubic meter">cubic meter</a> (mg/m<sup>3</sup>).<sup id="cite_ref-:2_2-0" class="reference"><a href="#cite_note-:2-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Units of measure for physical agents such as <a href="/wiki/Noise" title="Noise">noise</a> are specific to the agent. </p><p>A PEL is usually given as a time-weighted average (TWA), although some are <a href="/wiki/Short-term_exposure_limit" title="Short-term exposure limit">short-term exposure limits</a> (STEL) or ceiling limits. A TWA is the average exposure over a specified period, usually a nominal eight hours. This means that for limited periods a worker may be exposed to concentration excursions higher than the PEL, as long as the TWA is not exceeded and any applicable excursion limit is not exceeded. An excursion limit typically means that "...worker exposure levels may exceed 3 times the PEL-TWA for no more than a total of 30 minutes during a workday, and under no circumstances should they exceed 5 times the PEL-TWA, provided that the PEL-TWA is not exceeded."<sup id="cite_ref-Oregon_Rules_for_Air_Contaminants_437-002-0382_(1)c_3-0" class="reference"><a href="#cite_note-Oregon_Rules_for_Air_Contaminants_437-002-0382_(1)c-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Excursion limits are enforced in some states (for example Oregon) and on the federal level for certain contaminants such as asbestos. </p><p>A short-term exposure limit is one that addresses the average exposure over a 15-30 minute period of maximum exposure during a single work shift. A ceiling limit is one that may not be exceeded for any time, and is applied to irritants and other materials that have immediate effects. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Regulatory_agencies_for_occupational_noise_exposure">Regulatory agencies for occupational noise exposure</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=1" title="Edit section: Regulatory agencies for occupational noise exposure"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="OSHA">OSHA</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=2" title="Edit section: OSHA"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The current PEL for OSHA standards are based on a 5 <a href="/wiki/Decibel" title="Decibel">decibel</a> exchange rate. OSHA's PEL for noise exposure is 90 decibels (dBA) for an 8-hour TWA. Levels of 90-140 dBA are included in the noise dose.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> PEL can also be expressed as 100 percent “dose” for noise exposure. When the noise exposure increases by 5 dB, the exposure time is cut in half.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> According to OSHA, a 95dBA TWA would be a 200 percent dose.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> PEL is exceeded when TWA > 90 dBA. OSHA requires feasible engineering OR <a href="/wiki/Administrative_controls" title="Administrative controls">administrative controls</a>, and mandatory hearing protection when the PEL is exceeded. </p> <div class="mw-heading mw-heading3"><h3 id="MSHA">MSHA</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=3" title="Edit section: MSHA"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Like OSHA, <a href="/wiki/Mine_Safety_and_Health_Administration" title="Mine Safety and Health Administration">Mine Safety and Health Administration</a> (MSHA) also uses the same 5 decibel exchange rate and 90 dBA for an 8-hour TWA for their PEL. Once a miner's noise exposure exceeds the PEL, feasible engineering AND administrative controls must be in place to try to limit the noise exposure of the employees. If a mine operator uses administrative controls, procedures for such controls must be posted on the bulletin board and a copy must be supplied to all affected employees.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="NIOSH">NIOSH</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=4" title="Edit section: NIOSH"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/National_Institute_for_Occupational_Safety_and_Health" title="National Institute for Occupational Safety and Health">National Institute for Occupational Safety and Health</a> (NIOSH) <a href="/wiki/Recommended_Exposure_Limit" class="mw-redirect" title="Recommended Exposure Limit">Recommended Exposure Limit</a> (REL) for noise exposure uses a 3 decibel exchange rate. The recommendation for occupational noise exposure is 85 decibels (dBA) for an 8-hour TWA. For every 3 dB over 85, the exposure time is cut in half. NIOSH reports exposures above this level are considered hazardous. NIOSH uses a hierarchy of control to reduce or remove hazardous noise.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Chemical_regulation_for_permissible_exposure_limits">Chemical regulation for permissible exposure limits</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=5" title="Edit section: Chemical regulation for permissible exposure limits"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Permissible Exposure Limits are regulatory limits for chemical hazards in a workplace set by <a href="/wiki/Occupational_Safety_and_Health_Administration" title="Occupational Safety and Health Administration">OSHA</a>.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-what_10-0" class="reference"><a href="#cite_note-what-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Organizations may implement stricter guidelines for chemical use and exposure, but OSHA guidelines must be followed at the minimum.<sup id="cite_ref-smr_11-0" class="reference"><a href="#cite_note-smr-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-what_10-1" class="reference"><a href="#cite_note-what-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Permissible Exposure Limits are time-weighted average, meaning that a worker may be exposed to higher concentrations of the chemical at different times of the work shift.<sup id="cite_ref-what_10-2" class="reference"><a href="#cite_note-what-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p><p>Many factors contribute in establishing Permissible Exposure Limits. <a href="/wiki/Threshold_limit_value" title="Threshold limit value">Threshold Limit Values</a> (TLVs), often determined by the <a href="/wiki/American_Conference_of_Governmental_Industrial_Hygienists" title="American Conference of Governmental Industrial Hygienists">American Conference of Governmental Industrial Hygienists</a> (ACGHI), is a key component in determining the PEL.<sup id="cite_ref-smr_11-1" class="reference"><a href="#cite_note-smr-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-what_10-3" class="reference"><a href="#cite_note-what-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Other things that contribute to determining the PEL are toxicity and particle size.<sup id="cite_ref-what_10-4" class="reference"><a href="#cite_note-what-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>PELs for chemicals are measured in mg/M<sup>3</sup> (milligrams per cubic meter).<sup id="cite_ref-:2_2-1" class="reference"><a href="#cite_note-:2-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Mg/M<sup>3</sup> is used to measure pollutant’s mass in the air.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> PELs compliance is monitored through direct reading measurement tools, various sampling methods, and measuring biological markers in workers.<sup id="cite_ref-:0_14-0" class="reference"><a href="#cite_note-:0-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-:1_15-0" class="reference"><a href="#cite_note-:1-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup>  Sampling for biological markers may include sampling urine and blood.<sup id="cite_ref-:1_15-1" class="reference"><a href="#cite_note-:1-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> Direct measurement tools, such as Q-Trak, and indirect measurement tools such as <a href="/wiki/Gas_chromatography%E2%80%93mass_spectrometry" title="Gas chromatography–mass spectrometry">gas chromatography</a> can be used for air sampling.<sup id="cite_ref-:0_14-1" class="reference"><a href="#cite_note-:0-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Noise_Exposure">Noise Exposure</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=6" title="Edit section: Noise Exposure"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The Occupational Safety and Health Administration (OSHA) in the United States established the allowed exposure limit for occupational noise at 90 dB and is based on an 8-hour time-weighted average for an 8-hour workday.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> For worker's safety, OSHA mandates hearing conservation programs when noise levels are higher than 85 decibels.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> This is dependent on the sector, profession, or nation, different restrictions may apply. </p><p>Currently, about 200 million Americans are subject to harmful workplace noise.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> There are many factors, besides in the workplace, to how noise exposure can affect individuals more or less. These factors can include, but are not limited to, ageing, heredity factors, recreational activities, and some illnesses.<sup id="cite_ref-:3_19-0" class="reference"><a href="#cite_note-:3-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </p><p>While there are recommendations that exist for noise levels and noise control in communities, there is a lack of general agreement regarding acceptable exposure limits in non-occupational settings or the general environment. To limit noise exposure levels there are several approaches that can be used. One way to limit noise exposure is by wearing personal protective equipment (PPE) such as earplugs, or earmuffs.<sup id="cite_ref-:3_19-1" class="reference"><a href="#cite_note-:3-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> Another way to limit exposure should be reducing being in environments with heavy amounts of noise exposure.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> With this in mind it is important to keep individuals informed about prolonged noise exposure. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=7" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Mine_Safety_and_Health_Administration" title="Mine Safety and Health Administration">Mine Safety and Health Administration</a></li> <li><a href="/wiki/National_Institute_for_Occupational_Safety_and_Health" title="National Institute for Occupational Safety and Health">National Institute for Occupational Safety and Health</a></li> <li><a href="/wiki/Recommended_exposure_limit" title="Recommended exposure limit">Recommended exposure limit</a></li> <li><a href="/wiki/Respirator_assigned_protection_factors" title="Respirator assigned protection factors">Respirator assigned protection factors</a></li> <li><a href="/wiki/Short-term_exposure_limit" title="Short-term exposure limit">STEL</a></li> <li><a href="/wiki/Threshold_limit_value" title="Threshold limit value">Threshold limit value</a> published by <a href="/wiki/American_Conference_of_Governmental_Industrial_Hygienists" title="American Conference of Governmental Industrial Hygienists">ACGIH</a></li> <li><a href="/wiki/Occupational_exposure_banding" title="Occupational exposure banding">Occupational exposure banding</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=8" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.osha.gov/dsg/annotated-pels/">"OSHA Annotated PELs"</a>. <i>www.osha.gov</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2015-10-25</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.osha.gov&rft.atitle=OSHA+Annotated+PELs&rft_id=https%3A%2F%2Fwww.osha.gov%2Fdsg%2Fannotated-pels%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-:2-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-:2_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:2_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.osha.gov/annotated-pels">"Permissible Exposure Limits"</a>. <i>osha.gov/annotated-pels</i>. October 29, 2023<span class="reference-accessdate">. Retrieved <span class="nowrap">October 29,</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=osha.gov%2Fannotated-pels&rft.atitle=Permissible+Exposure+Limits&rft.date=2023-10-29&rft_id=https%3A%2F%2Fwww.osha.gov%2Fannotated-pels&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-Oregon_Rules_for_Air_Contaminants_437-002-0382_(1)c-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-Oregon_Rules_for_Air_Contaminants_437-002-0382_(1)c_3-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160304000403/http://www.cbs.state.or.us/osha/pdf/rules/division_2/div_2.pdf">"437-002-0382 Oregon Rules for Air Contaminants"</a> <span class="cs1-format">(PDF)</span>. Oregon Occupational Safety and Health Division. Archived from <a rel="nofollow" class="external text" href="http://www.cbs.state.or.us/osha/pdf/rules/division_2/div_2.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 4 March 2016<span class="reference-accessdate">. Retrieved <span class="nowrap">30 January</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=437-002-0382+Oregon+Rules+for+Air+Contaminants&rft.pub=Oregon+Occupational+Safety+and+Health+Division&rft_id=http%3A%2F%2Fwww.cbs.state.or.us%2Fosha%2Fpdf%2Frules%2Fdivision_2%2Fdiv_2.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFRawool2011" class="citation book cs1">Rawool, Vishakha (19 September 2011). <i>Hearing Conservation in Occupation, Education, and Home Settings</i>. New York: Thieme Publishers, Inc. p. 33. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-1604062564" title="Special:BookSources/978-1604062564"><bdi>978-1604062564</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Hearing+Conservation+in+Occupation%2C+Education%2C+and+Home+Settings&rft.place=New+York&rft.pages=33&rft.pub=Thieme+Publishers%2C+Inc.&rft.date=2011-09-19&rft.isbn=978-1604062564&rft.aulast=Rawool&rft.aufirst=Vishakha&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.osha.gov/Publications/laboratory/OSHAfactsheet-laboratory-safety-noise.pdf">"OSHA Fact Sheet"</a> <span class="cs1-format">(PDF)</span>. <i>OSHA</i><span class="reference-accessdate">. Retrieved <span class="nowrap">21 November</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=OSHA&rft.atitle=OSHA+Fact+Sheet&rft_id=https%3A%2F%2Fwww.osha.gov%2FPublications%2Flaboratory%2FOSHAfactsheet-laboratory-safety-noise.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.osha.gov/SLTC/noisehearingconservation/pel.html">"Permissible Noise Exposures"</a>. <i>OSHA</i><span class="reference-accessdate">. Retrieved <span class="nowrap">20 November</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=OSHA&rft.atitle=Permissible+Noise+Exposures&rft_id=https%3A%2F%2Fwww.osha.gov%2FSLTC%2Fnoisehearingconservation%2Fpel.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.ecfr.gov/cgi-bin/text-idx?SID=28741a401b0e74a8d116a4d905dd89b6&mc=true&node=pt30.1.62&rgn=div5#se30.1.62_1130">"62.130 Permissible Exposure Limit"</a>. <i>Government Publishing Office</i><span class="reference-accessdate">. Retrieved <span class="nowrap">20 November</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Government+Publishing+Office&rft.atitle=62.130+Permissible+Exposure+Limit&rft_id=https%3A%2F%2Fwww.ecfr.gov%2Fcgi-bin%2Ftext-idx%3FSID%3D28741a401b0e74a8d116a4d905dd89b6%26mc%3Dtrue%26node%3Dpt30.1.62%26rgn%3Ddiv5%23se30.1.62_1130&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/topics/noisecontrol/default.html">"Controls for Noise Exposure"</a>. <i>Centers for Disease Control and Prevention</i>. 2018-11-09<span class="reference-accessdate">. Retrieved <span class="nowrap">22 November</span> 2018</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Centers+for+Disease+Control+and+Prevention&rft.atitle=Controls+for+Noise+Exposure&rft.date=2018-11-09&rft_id=https%3A%2F%2Fwww.cdc.gov%2Fniosh%2Ftopics%2Fnoisecontrol%2Fdefault.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/pel88/pelstart.html">"1988 OSHA PEL Project Documentation | NIOSH"</a>. <i>www.cdc.gov</i>. 2022-12-14<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-11-28</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.cdc.gov&rft.atitle=1988+OSHA+PEL+Project+Documentation+%7C+NIOSH&rft.date=2022-12-14&rft_id=https%3A%2F%2Fwww.cdc.gov%2Fniosh%2Fpel88%2Fpelstart.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-what-10"><span class="mw-cite-backlink">^ <a href="#cite_ref-what_10-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-what_10-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-what_10-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-what_10-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-what_10-4"><sup><i><b>e</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://safetymanagementgroup.com/blog/what-is-the-pel-and-how-does-it-work/">"What is the PEL and How Does it Work?"</a>. <i>Safety Management Group</i>. 2015-07-30<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-11-28</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Safety+Management+Group&rft.atitle=What+is+the+PEL+and+How+Does+it+Work%3F&rft.date=2015-07-30&rft_id=https%3A%2F%2Fsafetymanagementgroup.com%2Fblog%2Fwhat-is-the-pel-and-how-does-it-work%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-smr-11"><span class="mw-cite-backlink">^ <a href="#cite_ref-smr_11-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-smr_11-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFRappaport1993" class="citation journal cs1">Rappaport, S. M. (May 1993). <a rel="nofollow" class="external text" href="https://onlinelibrary.wiley.com/doi/10.1002/ajim.4700230502">"Threshold limit values, permissible exposure limits, and feasibility: The bases for exposure limits in the United States"</a>. <i>American Journal of Industrial Medicine</i>. <b>23</b> (5): <span class="nowrap">683–</span>694. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2Fajim.4700230502">10.1002/ajim.4700230502</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0271-3586">0271-3586</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=American+Journal+of+Industrial+Medicine&rft.atitle=Threshold+limit+values%2C+permissible+exposure+limits%2C+and+feasibility%3A+The+bases+for+exposure+limits+in+the+United+States&rft.volume=23&rft.issue=5&rft.pages=%3Cspan+class%3D%22nowrap%22%3E683-%3C%2Fspan%3E694&rft.date=1993-05&rft_id=info%3Adoi%2F10.1002%2Fajim.4700230502&rft.issn=0271-3586&rft.aulast=Rappaport&rft.aufirst=S.+M.&rft_id=https%3A%2F%2Fonlinelibrary.wiley.com%2Fdoi%2F10.1002%2Fajim.4700230502&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://response.restoration.noaa.gov/oil-and-chemical-spills/chemical-spills/resources/workplace-exposure-limits.html">"Workplace Exposure Limits"</a>. <i>response.restoration.noaa.gov</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2023-11-28</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=response.restoration.noaa.gov&rft.atitle=Workplace+Exposure+Limits&rft_id=https%3A%2F%2Fresponse.restoration.noaa.gov%2Foil-and-chemical-spills%2Fchemical-spills%2Fresources%2Fworkplace-exposure-limits.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.safeopedia.com/definition/90/milligram-per-cubic-meter-mgm3">"What is Milligram Per Cubic Meter (Mg/M3)? - Definition from Safeopedia"</a>. <i>safeopedia.com</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2023-11-28</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=safeopedia.com&rft.atitle=What+is+Milligram+Per+Cubic+Meter+%28Mg%2FM3%29%3F+-+Definition+from+Safeopedia&rft_id=http%3A%2F%2Fwww.safeopedia.com%2Fdefinition%2F90%2Fmilligram-per-cubic-meter-mgm3&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-:0-14"><span class="mw-cite-backlink">^ <a href="#cite_ref-:0_14-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:0_14-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.osha.gov/direct-reading-instruments">"Direct Reading Instruments"</a>. <i>osha.gov/direct-reading-instruments</i>. November 6, 2023<span class="reference-accessdate">. Retrieved <span class="nowrap">November 6,</span> 2023</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=osha.gov%2Fdirect-reading-instruments&rft.atitle=Direct+Reading+Instruments&rft.date=2023-11-06&rft_id=https%3A%2F%2Fwww.osha.gov%2Fdirect-reading-instruments&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-:1-15"><span class="mw-cite-backlink">^ <a href="#cite_ref-:1_15-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:1_15-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFTustinCannon2022" class="citation journal cs1">Tustin, Aaron W.; Cannon, Dawn L. (February 2022). <a rel="nofollow" class="external text" href="https://onlinelibrary.wiley.com/doi/10.1002/ajim.23317">"Analysis of biomonitoring data to assess employer compliance with OSHA's permissible exposure limits for air contaminants"</a>. <i>American Journal of Industrial Medicine</i>. <b>65</b> (2): <span class="nowrap">81–</span>91. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2Fajim.23317">10.1002/ajim.23317</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0271-3586">0271-3586</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=American+Journal+of+Industrial+Medicine&rft.atitle=Analysis+of+biomonitoring+data+to+assess+employer+compliance+with+OSHA%27s+permissible+exposure+limits+for+air+contaminants&rft.volume=65&rft.issue=2&rft.pages=%3Cspan+class%3D%22nowrap%22%3E81-%3C%2Fspan%3E91&rft.date=2022-02&rft_id=info%3Adoi%2F10.1002%2Fajim.23317&rft.issn=0271-3586&rft.aulast=Tustin&rft.aufirst=Aaron+W.&rft.au=Cannon%2C+Dawn+L.&rft_id=https%3A%2F%2Fonlinelibrary.wiley.com%2Fdoi%2F10.1002%2Fajim.23317&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text">"Occupational noise exposure - overview". <i>Occupational Safety and Health Administration</i>. <a rel="nofollow" class="external free" href="https://www.osha.gov/noise">https://www.osha.gov/noise</a> </span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-17">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.osha.gov/noise/exposure-controls">"Occupational Noise Exposure"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2024-08-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Occupational+Noise+Exposure&rft_id=https%3A%2F%2Fwww.osha.gov%2Fnoise%2Fexposure-controls&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span></span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text">Christa L. Themann, Elizabeth A. Masterson; Occupational noise exposure: A review of its effects, epidemiology, and impact with recommendations for reducing its burden. <i>J. Acoust. Soc. Am.</i> 1 November 2019; 146 (5): 3879–</span> </li> <li id="cite_note-:3-19"><span class="mw-cite-backlink">^ <a href="#cite_ref-:3_19-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:3_19-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://iosh.com/guidance-and-resources">"Guidance and resources"</a>. <i>IOSH</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2024-08-01</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IOSH&rft.atitle=Guidance+and+resources&rft_id=https%3A%2F%2Fiosh.com%2Fguidance-and-resources&rfr_id=info%3Asid%2Fen.wikipedia.org%3APermissible+exposure+limit" class="Z3988"></span> </span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><b><a href="#cite_ref-20">^</a></b></span> <span class="reference-text">Centers for Disease Control and Prevention. (2023, January 23). <i>Noise and hearing loss - noise and occupational hearing loss</i>. Centers for Disease Control and Prevention. <a rel="nofollow" class="external free" href="https://www.cdc.gov/niosh/topics/noise/noise.html">https://www.cdc.gov/niosh/topics/noise/noise.html</a> </span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Permissible_exposure_limit&action=edit&section=9" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.osha.gov/dsg/annotated-pels/index.html">Permissible Exposure Limits – Annotated Tables</a> (Permissible Exposure Limits – Annotated Tables)</li> <li><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/pel88/npelname.html">1988 OSHA PEL Project Documentation: List by Chemical Name</a> Available from NIOSH</li> <li><a rel="nofollow" class="external text" href="http://www.acgih.org">ACGIH website</a> ACGIH website</li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20131229045640/http://www.tera.org/oars/WEEL.html">Workplace Environmental Exposure Limits (WEEL) Values available on-line through The Occupational Alliance for Risk Science - Workplace Environmental Exposure Levels (WEEL)</a></li></ul> <p><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> Related media at Wikimedia Commons: </p> <ul><li><a href="https://commons.wikimedia.org/wiki/File:Statistical_methods_noncompliance_with_occupational_health_standards.pdf" class="extiw" title="commons:File:Statistical methods noncompliance with occupational health standards.pdf">Statistical Methods for the Determination of Noncompliance with Occupational Health Standards (1975)</a></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul 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aria-labelledby="Richard_Nixon1004" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Richard_Nixon" title="Template:Richard Nixon"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Richard_Nixon" title="Template talk:Richard Nixon"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Richard_Nixon" title="Special:EditPage/Template:Richard Nixon"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Richard_Nixon1004" style="font-size:114%;margin:0 4em"><a href="/wiki/Richard_Nixon" title="Richard Nixon">Richard Nixon</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="nowrap"><a href="/wiki/List_of_presidents_of_the_United_States" title="List of presidents of the United States">37th</a> <a href="/wiki/President_of_the_United_States" title="President of the United States">President of the United States</a> (1969–1974)</span></li> <li><span class="nowrap"><a href="/wiki/List_of_vice_presidents_of_the_United_States" title="List of vice presidents of the United States">36th</a> <a href="/wiki/Vice_President_of_the_United_States" title="Vice President of the United States">Vice President of the United States</a> (1953–1961)</span></li> <li><span class="nowrap"><a href="/wiki/United_States_Senate" title="United States Senate">U.S. Senator</a> <a href="/wiki/List_of_United_States_senators_from_California" title="List of United States senators from California">from California</a> (1950–1953)</span></li> <li><span class="nowrap"><a href="/wiki/United_States_House_of_Representatives" title="United States House of Representatives">U.S. Representative</a> for <a href="/wiki/California%27s_12th_congressional_district" title="California's 12th congressional district">CA–12</a> (1947–1950)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Presidency_of_Richard_Nixon" title="Presidency of Richard Nixon">Presidency</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Presidential_transition_of_Richard_Nixon" title="Presidential transition of Richard Nixon">Transition</a></li> <li><a href="/wiki/First_inauguration_of_Richard_Nixon" title="First inauguration of Richard Nixon">First inauguration</a></li> <li><a href="/wiki/Second_inauguration_of_Richard_Nixon" title="Second inauguration of Richard Nixon">Second inauguration</a></li> <li><a href="/wiki/Nixon_Doctrine" title="Nixon Doctrine">Nixon Doctrine</a></li> <li>"<a href="/wiki/Bring_Us_Together" title="Bring Us Together">Bring Us Together</a>"</li> <li><a href="/wiki/Nixonomics" title="Nixonomics">Economic policies</a> <ul><li><a href="/wiki/Nixon_shock" title="Nixon shock">Nixon shock</a></li></ul></li> <li><a href="/wiki/Tar_Baby_Option" class="mw-redirect" title="Tar Baby Option">Tar Baby Option</a></li> <li><a href="/wiki/United_States_Environmental_Protection_Agency" title="United States Environmental Protection Agency">Environmental Protection Agency</a> <ul><li><a href="/wiki/Reorganization_Plan_No._3" class="mw-redirect" title="Reorganization Plan No. 3">creation</a></li></ul></li> <li><a href="/wiki/National_Oceanic_and_Atmospheric_Administration" title="National Oceanic and Atmospheric Administration">National Oceanic and Atmospheric Administration</a></li> <li><a href="/wiki/Space_policy_of_the_United_States#Nixon_administration" title="Space policy of the United States">Space exploration</a></li> <li><a href="/wiki/War_on_Cancer" class="mw-redirect" title="War on Cancer">1971 National Cancer Act</a></li> <li><a href="/wiki/Vietnam_War" title="Vietnam War">Vietnam War</a> <ul><li><a href="/wiki/Operation_Menu" title="Operation Menu">Cambodian bombing</a></li> <li><a href="/wiki/Paris_Peace_Accords" title="Paris Peace Accords">Paris Peace Accords</a></li> <li>"<a href="/wiki/Peace_with_Honor" title="Peace with Honor">Peace with Honor</a>"</li> <li><a href="/wiki/Vietnamization" title="Vietnamization">Vietnamization</a></li></ul></li> <li><a href="/wiki/Silent_majority" title="Silent majority">Silent majority</a></li> <li><a href="/wiki/Cold_War_(1962%E2%80%931979)" title="Cold War (1962–1979)">Cold War period</a> <ul><li><a href="/wiki/Linkage_(policy)" title="Linkage (policy)">Linkage policy</a></li></ul></li> <li><a href="/wiki/Comprehensive_Drug_Abuse_Prevention_and_Control_Act_of_1970" title="Comprehensive Drug Abuse Prevention and Control Act of 1970">Drug Abuse Prevention and Control Act</a></li> <li><a href="/wiki/Richard_Nixon%27s_visit_to_the_Lincoln_Memorial" title="Richard Nixon's visit to the Lincoln Memorial">1970 Lincoln Memorial visit</a></li> <li><a href="/wiki/1972_visit_by_Richard_Nixon_to_China" title="1972 visit by Richard Nixon to China">1972 visit to China</a> <ul><li><a href="/wiki/Shanghai_Communiqu%C3%A9" title="Shanghai Communiqué">Shanghai Communiqué</a></li></ul></li> <li><a href="/wiki/D%C3%A9tente" title="Détente">Détente</a> <ul><li><a href="/wiki/Moscow_Summit_(1972)" title="Moscow Summit (1972)">1972 Moscow Summit</a></li> <li><a href="/wiki/Anti-Ballistic_Missile_Treaty" title="Anti-Ballistic Missile Treaty">Anti-Ballistic Missile Treaty</a></li> <li><a href="/wiki/Strategic_Arms_Limitation_Talks" title="Strategic Arms Limitation Talks">SALT I Treaty</a></li> <li><a href="/wiki/Agreement_on_the_Prevention_of_Nuclear_War" title="Agreement on the Prevention of Nuclear War">Prevention of Nuclear War Agreement</a></li> <li><a href="/wiki/Threshold_Test_Ban_Treaty" title="Threshold Test Ban Treaty">Threshold Test Ban Treaty</a></li></ul></li> <li><a href="/wiki/Endangered_Species_Act_of_1973" title="Endangered Species Act of 1973">Endangered Species Act</a></li> <li><a href="/wiki/Shafer_Commission" title="Shafer Commission">National Commission on Marihuana and Drug Abuse</a></li> <li><a href="/wiki/War_on_Drugs" class="mw-redirect" title="War on Drugs">War on Drugs</a> <ul><li><a href="/wiki/Drug_Enforcement_Administration#History_and_mandate" title="Drug Enforcement Administration">Drug Enforcement Administration</a></li> <li><a href="/wiki/Cannabis_policy_of_the_Richard_Nixon_administration" title="Cannabis policy of the Richard Nixon administration">Cannabis policy</a></li></ul></li> <li><a href="/wiki/Nixon%27s_Enemies_List" title="Nixon's Enemies List">Enemies List</a> <ul><li><a href="/wiki/Master_list_of_Nixon%27s_political_opponents" title="Master list of Nixon's political opponents">list of opponents</a></li></ul></li> <li><a href="/wiki/Operation_CHAOS" title="Operation CHAOS">Operation CHAOS</a></li> <li><a href="/wiki/Watergate_scandal" title="Watergate scandal">Watergate</a> <ul><li><a href="/wiki/Timeline_of_the_Watergate_scandal" title="Timeline of the Watergate scandal">timeline</a></li> <li><a href="/wiki/Nixon_White_House_tapes" title="Nixon White House tapes">White House tapes</a></li> <li><i><a href="/wiki/United_States_v._Nixon" title="United States v. Nixon">United States v. Nixon</a></i></li> <li><a href="/wiki/United_States_Senate_Watergate_Committee" title="United States Senate Watergate Committee">Senate Watergate Committee</a></li> <li><a href="/wiki/Impeachment_process_against_Richard_Nixon" title="Impeachment process against Richard Nixon">impeachment process</a></li> <li>"<a href="/wiki/I_am_not_a_crook" class="mw-redirect" title="I am not a crook">I am not a crook</a>"</li></ul></li> <li><a href="/wiki/Watergate_scandal#Resignation" title="Watergate scandal">Resignation</a> <ul><li><a href="/wiki/Richard_Nixon%27s_resignation_speech" title="Richard Nixon's resignation speech">speech</a></li></ul></li> <li><a href="/wiki/Pardon_of_Richard_Nixon" title="Pardon of Richard Nixon">Pardon</a></li> <li><a href="/wiki/State_of_the_Union" title="State of the Union">State of the Union Address</a> <ul><li><a href="/wiki/1970_State_of_the_Union_Address" title="1970 State of the Union Address">1970</a></li> <li><a href="/wiki/1971_State_of_the_Union_Address" title="1971 State of the Union Address">1971</a></li> <li><a href="/wiki/1972_State_of_the_Union_Address" title="1972 State of the Union Address">1972</a></li> <li><a href="/wiki/1973_State_of_the_Union_Address" title="1973 State of the Union Address">1973</a></li> <li><a href="/wiki/1974_State_of_the_Union_Address" title="1974 State of the Union Address">1974</a></li></ul></li> <li><a href="/wiki/Wilson_desk" title="Wilson desk">Wilson desk</a></li> <li><a href="/wiki/List_of_federal_judges_appointed_by_Richard_Nixon" title="List of federal judges appointed by Richard Nixon">Judicial appointments</a> <ul><li><a href="/wiki/Richard_Nixon_Supreme_Court_candidates" title="Richard Nixon Supreme Court candidates">Supreme Court</a></li> <li><a href="/wiki/Richard_Nixon_judicial_appointment_controversies" title="Richard Nixon judicial appointment controversies">controversies</a></li></ul></li> <li><a href="https://en.wikisource.org/wiki/Author:Richard_Milhous_Nixon/Executive_orders" class="extiw" title="wikisource:Author:Richard Milhous Nixon/Executive orders">Executive Orders</a></li> <li><a href="https://en.wikisource.org/wiki/Author:Richard_Milhous_Nixon/Presidential_Proclamations" class="extiw" title="wikisource:Author:Richard Milhous Nixon/Presidential Proclamations">Presidential Proclamations</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Life and<br />politics</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Richard_Nixon_Foundation" title="Richard Nixon Foundation">Richard Nixon Foundation</a></li> <li><a href="/wiki/Richard_Nixon_Presidential_Library_and_Museum" title="Richard Nixon Presidential Library and Museum">Presidential Library and Museum</a></li> <li><a href="/wiki/Birthplace_of_Richard_Nixon" title="Birthplace of Richard Nixon">Birthplace and boyhood home</a></li> <li><a href="/wiki/Checkers_speech" title="Checkers speech">Checkers speech</a></li> <li><a href="/wiki/Attack_on_Richard_Nixon%27s_motorcade" title="Attack on Richard Nixon's motorcade">1958 motorcade attack</a></li> <li><a href="/wiki/Kitchen_Debate" title="Kitchen Debate">Kitchen Debate</a></li> <li><a href="/wiki/Operation_40" title="Operation 40">Operation 40</a></li> <li><a href="/wiki/Richard_Nixon%27s_November_1962_press_conference" title="Richard Nixon's November 1962 press conference">"Last press conference"</a></li> <li><a href="/wiki/Florida_White_House" class="mw-redirect" title="Florida White House">Florida White House</a></li> <li>"<a href="/wiki/La_Casa_Pacifica" title="La Casa Pacifica">La Casa Pacifica</a>"</li> <li><a href="/wiki/Center_for_the_National_Interest" title="Center for the National Interest">Nixon Center</a></li> <li><i><a href="/wiki/Nixon_v._General_Services_Administration" title="Nixon v. General Services Administration">Nixon v. General Services Administration</a></i></li> <li><a href="/wiki/Death_and_state_funeral_of_Richard_Nixon" title="Death and state funeral of Richard Nixon">Death and state funeral</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Books</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Six_Crises" title="Six Crises"><i>Six Crises</i> (1962)</a></li> <li><a href="/wiki/Bibliography_of_Richard_Nixon" title="Bibliography of Richard Nixon">Bibliography</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Electoral_history_of_Richard_Nixon" title="Electoral history of Richard Nixon">Elections</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>U.S. House of Representatives: <a href="/wiki/1946_California%27s_12th_congressional_district_election" title="1946 California's 12th congressional district election">1946</a></li> <li><a href="/wiki/1948_United_States_House_of_Representatives_elections" title="1948 United States House of Representatives elections">1948</a></li> <li>U.S. Senate: <a href="/wiki/1950_United_States_Senate_election_in_California" title="1950 United States Senate election in California">1950</a></li> <li>California gubernatorial election: <a href="/wiki/1962_California_gubernatorial_election" title="1962 California gubernatorial election">1962</a></li> <li>GOP presidential primaries: <a href="/wiki/1960_Republican_Party_presidential_primaries" title="1960 Republican Party presidential primaries">1960</a></li> <li><a href="/wiki/1964_Republican_Party_presidential_primaries" title="1964 Republican Party presidential primaries">1964</a></li> <li><a href="/wiki/1968_Republican_Party_presidential_primaries" title="1968 Republican Party presidential primaries">1968</a></li> <li><a href="/wiki/1972_Republican_Party_presidential_primaries" title="1972 Republican Party presidential primaries">1972</a></li> <li>GOP national conventions: <a href="/wiki/1952_Republican_National_Convention" title="1952 Republican National Convention">1952</a></li> <li><a href="/wiki/1956_Republican_National_Convention" title="1956 Republican National Convention">1956</a></li> <li><a href="/wiki/1960_Republican_National_Convention" title="1960 Republican National Convention">1960</a> <ul><li><a href="/wiki/Richard_Nixon_1960_presidential_campaign" title="Richard Nixon 1960 presidential campaign">campaign</a></li></ul></li> <li><a href="/wiki/1968_Republican_National_Convention" title="1968 Republican National Convention">1968</a> <ul><li><a href="/wiki/Richard_Nixon_1968_presidential_campaign" title="Richard Nixon 1968 presidential campaign">campaign</a></li></ul></li> <li><a href="/wiki/1972_Republican_National_Convention" title="1972 Republican National Convention">1972</a> <ul><li><a href="/wiki/Richard_Nixon_1972_presidential_campaign" title="Richard Nixon 1972 presidential campaign">campaign</a></li></ul></li> <li>Presidential elections: <a href="/wiki/1952_United_States_presidential_election" title="1952 United States presidential election">1952</a> <ul><li><a href="/wiki/Presidential_transition_of_Dwight_D._Eisenhower" title="Presidential transition of Dwight D. Eisenhower">transition</a></li></ul></li> <li><a href="/wiki/1956_United_States_presidential_election" title="1956 United States presidential election">1956</a></li> <li><a href="/wiki/1960_United_States_presidential_election" title="1960 United States presidential election">1960</a> <ul><li><a href="/wiki/1960_United_States_presidential_debates" title="1960 United States presidential debates">debates</a></li> <li><a href="/wiki/Presidential_transition_of_John_F._Kennedy" title="Presidential transition of John F. Kennedy">Kennedy transition</a></li></ul></li> <li><a href="/wiki/1968_United_States_presidential_election" title="1968 United States presidential election">1968</a></li> <li><a href="/wiki/1972_United_States_presidential_election" title="1972 United States presidential election">1972</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Cultural_depictions_of_Richard_Nixon" title="Cultural depictions of Richard Nixon">Popular<br />culture</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>"<a href="/wiki/Nixon_goes_to_China" title="Nixon goes to China">Nixon goes to China</a>"</li> <li><a href="/wiki/Millhouse_(film)" title="Millhouse (film)"><i>Millhouse</i> (1971 film)</a></li> <li><i><a href="/wiki/An_Evening_with_Richard_Nixon" title="An Evening with Richard Nixon">An Evening with Richard Nixon</a></i> (1972 play)</li> <li><i><a href="/wiki/Richard_(film)" title="Richard (film)">Richard</a></i> (1972 film)</li> <li><i><a href="/wiki/Another_Nice_Mess" title="Another Nice Mess">Another Nice Mess</a></i> (1972 film)</li> <li><a href="/wiki/Four_More_Years" title="Four More Years"><i>Four More Years</i> (1972 film)</a></li> <li><a href="/wiki/Impeach_the_President" title="Impeach the President"><i>Impeach the President</i> (1973 song)</a></li> <li><i><a href="/wiki/The_Werewolf_of_Washington" title="The Werewolf of Washington">The Werewolf of Washington</a></i> (1973 film)</li> <li><a href="/wiki/White_House_Madness" title="White House Madness"><i>White House Madness</i> (1975 film)</a></li> <li><a href="/wiki/All_the_President%27s_Men_(film)" title="All the President's Men (film)"><i>All the President's Men</i> (1976 film)</a></li> <li><i><a href="/wiki/The_Public_Burning" title="The Public Burning">The Public Burning</a></i> (1977 novel)</li> <li><i><a href="/wiki/Washington:_Behind_Closed_Doors" title="Washington: Behind Closed Doors">Washington: Behind Closed Doors</a></i> (1977 miniseries)</li> <li><a href="/wiki/Secret_Honor" title="Secret Honor"><i>Secret Honor</i> (1984 film)</a></li> <li><a href="/wiki/Nixon_in_China" title="Nixon in China"><i>Nixon in China</i> (1987 opera)</a></li> <li><i><a href="/wiki/The_Final_Days_(1989_film)" title="The Final Days (1989 film)">The Final Days</a></i> (1989 film)</li> <li><a href="/wiki/Nixon_(film)" title="Nixon (film)"><i>Nixon</i> (1995 film)</a></li> <li><a href="/wiki/Elvis_Meets_Nixon" title="Elvis Meets Nixon"><i>Elvis Meets Nixon</i> (1997 film)</a></li> <li><i><a href="/wiki/List_of_Futurama_characters#Richard_Nixon" title="List of Futurama characters">Futurama</a></i> (1999 TV series)</li> <li><a href="/wiki/Dick_(film)" title="Dick (film)"><i>Dick</i> (1999 film)</a></li> <li><i><a href="/wiki/Nixon%27s_China_Game" title="Nixon's China Game">Nixon's China Game</a></i> (2000 film)</li> <li><i><a href="/wiki/Dark_Side_of_the_Moon_(2002_film)" title="Dark Side of the Moon (2002 film)">Dark Side of the Moon</a></i> (2002 film)</li> <li><i><a href="/wiki/The_Assassination_of_Richard_Nixon" title="The Assassination of Richard Nixon">The Assassination of Richard Nixon</a></i> (2004 film)</li> <li><a href="/wiki/Nixon_interviews" title="Nixon interviews">Frost–Nixon interviews</a> (<a href="/wiki/Frost/Nixon_(play)" title="Frost/Nixon (play)">2006 play</a>, <a href="/wiki/Frost/Nixon_(film)" title="Frost/Nixon (film)">2008 film</a>)</li> <li><i><a href="/wiki/Black_Dynamite" title="Black Dynamite">Black Dynamite</a></i> (2009 film)</li> <li>"<a href="/wiki/The_Impossible_Astronaut" title="The Impossible Astronaut">The Impossible Astronaut</a>" (2011 TV episode)</li> <li><a href="/wiki/Our_Nixon" title="Our Nixon"><i>Our Nixon</i> (2013 film)</a></li> <li><i><a href="/wiki/X-Men:_Days_of_Future_Past" title="X-Men: Days of Future Past">X-Men: Days of Future Past</a></i> (2014 film)</li> <li><i><a href="/wiki/Crooked_(novel)" title="Crooked (novel)">Crooked</a></i> (2015 novel)</li> <li><a href="/wiki/Elvis_%26_Nixon" title="Elvis & Nixon"><i>Elvis & Nixon</i> (2016 film)</a></li> <li><i><a href="/wiki/The_Post_(film)" title="The Post (film)">The Post</a></i> (2017 film)</li> <li><i><a href="/wiki/Watergate_(board_game)" title="Watergate (board game)">Watergate</a></i> (2019 board game)</li> <li><a href="/wiki/Presidents_of_the_United_States_on_U.S._postage_stamps#Richard_M._Nixon" title="Presidents of the United States on U.S. postage stamps">U.S. postage stamp</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Presidential_Recordings_and_Materials_Preservation_Act" title="Presidential Recordings and Materials Preservation Act">Presidential Recordings and Materials Preservation Act</a></li> <li><a href="/wiki/Presidential_Townhouse" title="Presidential Townhouse">Presidential Townhouse</a></li> <li><a href="/wiki/Richard_Nixon_mask" title="Richard Nixon mask">Richard Nixon mask</a></li> <li><a href="/wiki/Nixon_diamond" title="Nixon diamond">Nixon diamond</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Staff</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Jack_Brennan" title="Jack Brennan">Jack Brennan</a> (aide de camp)</li> <li><a href="/wiki/Murray_Chotiner" title="Murray Chotiner">Murray Chotiner</a> (early campaign manager)</li> <li><a href="/wiki/Manolo_Sanchez_(Nixon_staff_member)" class="mw-redirect" title="Manolo Sanchez (Nixon staff member)">Manolo Sanchez</a> (valet)</li> <li><a href="/wiki/Rose_Mary_Woods" title="Rose Mary Woods">Rose Mary Woods</a> (secretary)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Family</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pat_Nixon" title="Pat Nixon">Thelma "Pat" Ryan Nixon</a> (wife)</li> <li><a href="/wiki/Tricia_Nixon_Cox" title="Tricia Nixon Cox">Tricia Nixon Cox</a> (daughter)</li> <li><a href="/wiki/Julie_Nixon_Eisenhower" title="Julie Nixon Eisenhower">Julie Nixon Eisenhower</a> (daughter)</li> <li><a href="/wiki/Christopher_Nixon_Cox" title="Christopher Nixon Cox">Christopher Nixon Cox</a> (grandson)</li> <li><a href="/wiki/Jennie_Eisenhower" title="Jennie Eisenhower">Jennie Eisenhower</a> (granddaughter)</li> <li><a href="/wiki/Francis_A._Nixon" title="Francis A. 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