{"id":4668,"date":"2017-11-01T12:08:16","date_gmt":"2017-11-01T17:08:16","guid":{"rendered":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/?page_id=4668"},"modified":"2023-08-10T15:16:22","modified_gmt":"2023-08-10T20:16:22","slug":"hw-instructions","status":"publish","type":"page","link":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/hw-instructions\/","title":{"rendered":"HW &#8211; How to Collect and Label"},"content":{"rendered":"<div data-modular-content-collection><p style=\"text-align: center;\"><em>Collect Your Waste<\/em><br \/>\n<em>Label Your Waste<\/em><br \/>\n<em>Dispose Your Waste<\/em><\/p>\n<p>Proper collection, identification, and storage of hazardous waste are\u00a0a critical functions\u00a0of operating a safe lab space, whether it be a teaching or research lab. \u00a0Please follow the rules and procedures on this page.<br \/>\nQuestions? \u00a0Contact the <a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/index\/\" target=\"_blank\" rel=\"noopener\">Chemical Hygiene Officer<\/a> or your\u00a0<a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/contact-info-and-labs-supported\/\" target=\"_blank\" rel=\"noopener\">Stockroom Manager<\/a>.<\/p>\n<hr \/>\n<h4 style=\"text-align: center;\">FOR CHEMICAL MIXTURES:<\/h4>\n<h6>BEFORE You Start an Experiment:<\/h6>\n<span class=\"collapseomatic arrowleft\" id=\"id69e3685608e06\"  tabindex=\"0\" title=\"&lt;strong&gt;STEP 1: &lt;\/strong&gt;&lt;strong&gt;Determine if Your Waste will be Hazardous&lt;\/strong&gt;\"    ><strong>STEP 1: <\/strong><strong>Determine if Your Waste will be Hazardous<\/strong><\/span><div id=\"target-id69e3685608e06\" class=\"collapseomatic_content \">\n<ul>\n<li>Go to the University of Minnesota online\u00a0<strong><a href=\"http:\/\/www.dehs.umn.edu\/hazwaste_chemwastereg.htm\" target=\"_blank\" rel=\"noopener noreferrer\">Chemical Waste Registry<\/a>.<\/strong><\/li>\n<li><strong>Type in<\/strong> either the <strong>Chemical Name<\/strong> or <strong>CAS Number<\/strong> (Chemical Abstract Services)\u00a0and click on \u201cSearch.\u201d<\/li>\n<li><strong>Look at DDC #<\/strong>. \u00a0In the Search Results, look\u00a0under the \u201cDDC #\u201d column (for a review of the DDC system <a title=\"HW \u2013 The Drum Designator Code (DDC)\" href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/hw-the-drum-designator-code\/\" target=\"_blank\" rel=\"noopener noreferrer\">look here<\/a>).\n<ul>\n<li><strong>\u201cxxNH\u201d &#8212;\u00a0<\/strong>\u00a0If the DDC contains two numbers followed by the letters \u201cNH\u201d (i.e., 05NH), then the\u00a0substance generally is considered nonhazardous and can be disposed down the sewer or in the trash; however, please first consult with the CHO before placing anything in the trash or sewer.<\/li>\n<li><strong>If the DDC# includes anything except the \u201cxxNH\u201d designation, then assume that the waste<\/strong> <strong>is hazardous waste.<\/strong><\/li>\n<li>If your waste is a mixture of chemicals, and if one of the chemicals does not contain the \u201cxxNH\u201d designation, then assume that the combined substance is hazardous waste unless the CHO states otherwise.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div><br class=\"none\" \/><span class=\"collapseomatic arrowleft\" id=\"id69e3685608ee4\"  tabindex=\"0\" title=\"&lt;strong&gt;STEP 2: &lt;\/strong&gt;&lt;strong&gt;Think about the Consequences of Your Waste (Quantity, Hazards, Compatibility)&lt;\/strong&gt;\"    ><strong>STEP 2: <\/strong><strong>Think about the Consequences of Your Waste (Quantity, Hazards, Compatibility)<\/strong><\/span><div id=\"target-id69e3685608ee4\" class=\"collapseomatic_content \">\n<ul>\n<li>Are you prepared to safely\u00a0handle and store this waste until its removal?<\/li>\n<li><a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/hw-stop-can-you-mix-your-wastes\/\" target=\"_blank\" rel=\"noopener\">STOP!! \u00a0Can You Mix Your Wastes? \u00a0Are they compatible?<\/a><\/li>\n<li>Do you know how to respond to a spill?<\/li>\n<li>Can you use\u00a0alternative substances or change your procedure to\u00a0either eliminate the creation (or reduce the amount) of hazardous waste, or create waste that has lower hazardous properties?<\/li>\n<\/ul>\n<\/div><br class=\"none\" \/><span class=\"collapseomatic arrowleft\" id=\"id69e3685608f39\"  tabindex=\"0\" title=\"&lt;strong&gt;STEP 3: &lt;\/strong&gt;&lt;strong&gt;Obtain a HW Container (and Screw-top Lid), HW Sticker, and Log Sheet&lt;\/strong&gt;\"    ><strong>STEP 3: <\/strong><strong>Obtain a HW Container (and Screw-top Lid), HW Sticker, and Log Sheet<\/strong><\/span><div id=\"target-id69e3685608f39\" class=\"collapseomatic_content \">\n<ul>\n<li><strong>HW Containers.<\/strong>\n<ul>\n<li>20L and 4L containers (and screw-top lids) are available in RNS 341, on shelves near the elevator (if you take a container and lid then write this info on the stockroom check-out sheet that is hanging on the door).<\/li>\n<li>Other sizes\u00a0are available from the Stockroom Managers.<\/li>\n<li><strong>HW\u00a0Container Lids <\/strong>\n<ul>\n<li><strong>HW containers must have a screw-top lid<\/strong>; containers with corked lids, stoppers, parafilm, etc. are not acceptable.<\/li>\n<li>If necessary place your corked\/stopper container into a larger screw-top container.<\/li>\n<li><strong>Vented Lids.<\/strong> \u00a0If you suspect even the slightest buildup of gases within your HW container (e.g., you have used nitric acid), then obtain a vented lid from RNS 341. \u00a0There are vented lids for 20L and 4L containers.<\/li>\n<\/ul>\n<\/li>\n<li><strong>IS YOUR HW CONTAINER CLEAN?<\/strong>\u00a0 Be sure that the\u00a0container that you plan to use for your waste has been rinsed completely of any previous substance to avoid the possibility of mixing incompatible chemicals.<\/li>\n<li>Remove or deface (use a Sharpie marker) any old labels that may already be on the container.<\/li>\n<li>Please contact the CHO if you have questions about your HW container.<\/li>\n<\/ul>\n<\/li>\n<li><strong><a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-content\/blogs.dir\/83\/files\/2015\/04\/HW-Waste-Sticker.jpg\" target=\"_blank\" rel=\"noopener noreferrer\">HW Stickers<\/a><\/strong>\u00a0are in RNS 253 or 341; affix it to the front of the HW container.\n<figure id=\"attachment_1202\" aria-describedby=\"caption-attachment-1202\" style=\"width: 150px\" class=\"wp-caption alignright\"><a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Waste-Sticker-e1468258912430.jpg\" target=\"_blank\" rel=\"attachment wp-att-1202 noopener\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1202\" data-permalink=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/hazardous-waste\/hw-waste-sticker\/\" data-orig-file=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Waste-Sticker-e1468258912430.jpg\" data-orig-size=\"400,282\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"HW Waste Sticker\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Stickers are in RNS 253 &amp;#038; 341.&lt;\/p&gt;\n\" data-large-file=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Waste-Sticker-e1468258912430.jpg\" class=\"wp-image-1202\" src=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Waste-Sticker-e1468258912430-300x212.jpg\" alt=\"Stickers are in RNS 253 &amp; 341.\" width=\"150\" height=\"106\" \/><\/a><figcaption id=\"caption-attachment-1202\" class=\"wp-caption-text\">Stickers are in RNS 253 &amp; 341.<\/figcaption><\/figure><\/li>\n<li><a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-content\/blogs.dir\/83\/files\/2015\/04\/STO-Haz-Waste-Log-Sheet.docx\" target=\"_blank\" rel=\"noopener\"><strong>HW Log Sheets<\/strong> can be<\/a><strong> downloaded, <\/strong>or obtain one from RNS 253 or RNS 341 (the Google Doc version of the HW Log Sheet appears onscreen with unusual formatting; the downloaded doc\u00a0will be formatted correctly).<\/li>\n<li><strong>Write the\u00a0following information<\/strong> on both the HW Log Sheet AND the HW Sticker (<em>These are critical steps as it allows us to\u00a0match the container to the proper HW Log)<\/em>:\n<ul>\n<li>Start Date.<\/li>\n<li>RNS room number.<\/li>\n<li>On the HW Log Sheet, indicate the container size (20L, 4L, other) and the waste state (Solid or Liquid)<em>.<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div><br class=\"none\" \/><span class=\"collapseomatic arrowleft\" id=\"id69e3685609000\"  tabindex=\"0\" title=\"&lt;strong&gt;NITRIC AID \u2013 Use a Vented Lid; DO NOT MIX WITH Organic Solvents or Organic Acids&lt;\/strong&gt;\"    ><strong>NITRIC AID \u2013 Use a Vented Lid; DO NOT MIX WITH Organic Solvents or Organic Acids<\/strong><\/span><div id=\"target-id69e3685609000\" class=\"collapseomatic_content \">\n<ul>\n<li><a href=\"https:\/\/vimeo.com\/163014970\" target=\"_blank\" rel=\"noopener noreferrer\">This video explains the hazards of mixing nitric acid with other wastes<\/a>.<\/li>\n<li><a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/hw-stop-can-you-mix-your-wastes\/\" target=\"_blank\" rel=\"noopener\">STOP!! \u00a0Can You Mix Your Wastes? \u00a0Are they compatible?<\/a><\/li>\n<li>Do not mix Nitric Acid Waste with:\n<ul>\n<li>Acetic Acid; Acetic Anhydride; Acetone; Acetonitrile; Acrylonitrile; Alcohols; Aldehydes; Alkali Metals; Ammonia; Cyanides; Powdered Metals; other Organic\u00a0Substances<\/li>\n<\/ul>\n<\/li>\n<li>\u201c\u2026Nitric\u00a0Acid<em> is the common chemical most frequently involved in reactive incidents, and this is a reflection of its exceptional ability to function as an effective oxidant even under fairly dilute conditions (unlike sulfuric acid) or at ambient temperature (unlike perchloric acid). \u00a0Its other notable ability to oxidize most organic compounds to gaseous carbon dioxide, coupled with its own reduction to gaseous \u2018nitrous fume\u2019 has been involved in many incidents in which closed, or nearly closed reaction vessels &#8230;\u00a0have failed from internal gas pressure.\u201d \u00a0<\/em>(Bretherick 1990)<\/li>\n<li><strong>Use a Vented Lid<\/strong><strong>. \u00a0<\/strong><em>If you do have Nitric Acid mixed with other substances, then you must use the vented screw-top lids\u00a0that we have in stock in RNS 341.<\/em>\n<ul>\n<li>Watch\u00a0<a href=\"https:\/\/vimeo.com\/143902401\" target=\"_blank\" rel=\"noopener noreferrer\">this short video demonstration<\/a> on the effectiveness of vented caps.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<h6><br class=\"none\" \/>DURING\u00a0Your Experiment:<\/h6>\n<span class=\"collapseomatic arrowleft\" id=\"id69e3685609047\"  tabindex=\"0\" title=\"&lt;strong&gt;Update the HW Log Sheet &lt;em&gt;every time&lt;\/em&gt; Waste is Added&lt;\/strong&gt;\"    ><strong>Update the HW Log Sheet <em>every time<\/em> Waste is Added<\/strong><\/span><div id=\"target-id69e3685609047\" class=\"collapseomatic_content \">\n<h3><\/h3>\n<table class=\" aligncenter\" width=\"375\">\n<tbody>\n<tr>\n<td>\n<h4>Warning: DO NOT MIX Nitric Acid with Organics!<\/h4>\n<h4>If you have Nitric Acid Waste Then <em><a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/hw-stop-can-you-mix-your-wastes\/\" target=\"_blank\" rel=\"noopener noreferrer\">Read These Procedures<\/a>.<\/em><\/h4>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li>\u00a0<strong>Fill out the <a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-content\/blogs.dir\/83\/files\/2015\/04\/STO-Haz-Waste-Log-Sheet.docx\" target=\"_blank\" rel=\"noopener noreferrer\">HW Log Sheet<\/a><\/strong>. Use a separate column for each substance added to the container. \u00a0Each and every time that a substance is poured into the waste\n<figure id=\"attachment_1267\" aria-describedby=\"caption-attachment-1267\" style=\"width: 150px\" class=\"wp-caption alignright\"><a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Jar-example.jpg\" rel=\"attachment wp-att-1267\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1267\" data-permalink=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/hazardous-waste\/hw-jar-example\/\" data-orig-file=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Jar-example.jpg\" data-orig-size=\"1913,1966\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"HW Jar &amp;#038; Log Sheet\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Jar-example-996x1024.jpg\" class=\"wp-image-1267\" src=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/files\/2015\/04\/HW-Jar-example-292x300.jpg\" alt=\"HW Jar &amp; Log Sheet\" width=\"150\" height=\"154\" \/><\/a><figcaption id=\"caption-attachment-1267\" class=\"wp-caption-text\">HW Container &amp; Log Sheet<\/figcaption><\/figure>\n<p>container, you MUST print the following information onto the Hazardous Waste Log sheet:<\/p>\n<ul>\n<li>Chemical name (complete spelling, <strong>no abbreviations<\/strong>). \u00a0For \u201cpre-existing\u201d mixtures you can indicate the ratio (e.g., Acetone:Water\/3:1).<\/li>\n<li>Quantity added (in ml or mg).<\/li>\n<li>Your initials (your students must initialize if they pour substances into containers).<\/li>\n<li>The lab section (if appropriate).<\/li>\n<li>Note the presence of any sludge or precipitate.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div><br class=\"none\" \/><span class=\"collapseomatic arrowleft\" id=\"id69e36856090cf\"  tabindex=\"0\" title=\"&lt;strong&gt;Keep Container Closed (And Special Instructions for HPLC\/Analytical Waste Containers)&lt;\/strong&gt;\"    ><strong>Keep Container Closed (And Special Instructions for HPLC\/Analytical Waste Containers)<\/strong><\/span><div id=\"target-id69e36856090cf\" class=\"collapseomatic_content \">\n<ul>\n<li><strong>The container must remain closed at all times, except<\/strong> for those very brief seconds when waste is actually being poured into the container.\n<ul>\n<li>If the container has a screw-on funnel with a close-top lid, then close the lid.<\/li>\n<li>If you use a removable funnel, then you must remove the funnel and screw on the cap.<\/li>\n<\/ul>\n<\/li>\n<li><strong>HPLC and Other Analytical Waste Containers.<\/strong> \u00a0HPLC and other such liquid waste is generated slowly and over an extended period of time when the equipment is used as intended, and it is not practical to open and close the waste container during the analytical process. \u00a0Furthermore, the container cap needs to be vented.\n<ul>\n<li>The container cap must have at least\u00a0two holes in it; one for the HPLC hose and the other to vent the container.\u00a0 The holes should be of such a diameter that the hose fits snugly into the cap and the vent hole is only large enough to prevent pressure build-up while the container is being filled.\u00a0 These vented caps can be transferred to the container being filled and the full container can be capped with an unmodified cover.\n<ul>\n<li>Contact the CHO or StockroomManager to obtain these vented caps.<\/li>\n<\/ul>\n<\/li>\n<li>Practices that ARE NOT acceptable include wrapping hoses with tin foil, tissue, rubber gloves, tape, wax, or other loosely-fitted materials. \u00a0These methods do not meet the regulatory requirements and are considered open containers by the regulatory authorities.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div><br class=\"none\" \/><span class=\"collapseomatic arrowleft\" id=\"id69e368560910c\"  tabindex=\"0\" title=\"&lt;strong&gt;Neutralize the Mixture, if Possible&lt;\/strong&gt;\"    ><strong>Neutralize the Mixture, if Possible<\/strong><\/span><div id=\"target-id69e368560910c\" class=\"collapseomatic_content \">\n<ul>\n<li><strong>Neutralize the Mixture, if Possible \u2013 It Saves Us Money<\/strong>. Disposal of corrosive wastes are substantially more expensive than the neutralized version of the same wastes; therefore, please neutralize your waste if it is feasible. \u00a0In fact, once neutralization has been completed, the substance may not qualify as waste and it might be permissible to pour it down the sink. \u00a0Please check first with\u00a0the CHO.\u00a0\u00a0&#8220;<strong>Neutralize<\/strong>&#8221; in this case means a <strong>pH between 5-9<\/strong>; the pH does not need to be 7.<\/li>\n<\/ul>\n<\/div>\n<h6><br class=\"none\" \/>AFTER\u00a0Your Experiment (or when the Container is Ready\u00a0for Removal):<\/h6>\n<span class=\"collapseomatic arrowleft\" id=\"id69e3685609148\"  tabindex=\"0\" title=\"&lt;strong&gt;TEACHING LABS&lt;\/strong&gt;\"    ><strong>TEACHING LABS<\/strong><\/span><div id=\"target-id69e3685609148\" class=\"collapseomatic_content \">\n<ul>\n<li><strong>Inform your Stockroom Manager and the CHO<\/strong>, who will remove the container.<\/li>\n<li>IMPORTANT: If you will need a new container then please\u00a0<strong>inform the Stockroom Manager BEFORE your waste container is completely full (ideally the day before). \u00a0<\/strong>This will\u00a0ensure that a new container is brought to the lab in time.<\/li>\n<\/ul>\n<\/div><br class=\"none\" \/><span class=\"collapseomatic arrowleft\" id=\"id69e3685609183\"  tabindex=\"0\" title=\"&lt;strong&gt;RESEARCH LABS&lt;\/strong&gt;\"    ><strong>RESEARCH LABS<\/strong><\/span><div id=\"target-id69e3685609183\" class=\"collapseomatic_content \">\n<ul>\n<li><strong>Neutralize the Mixture, if Possible \u2013 It Saves Us Money<\/strong>. Disposal of corrosive wastes are substantially more expensive than the neutralized version of the same wastes; therefore, please neutralize your waste if it is feasible. \u00a0In fact, once neutralization has been completed, the substance may not qualify as waste and it might be permissible to pour it down the sink. \u00a0Please check first with the CHO.\n<ul>\n<li><strong>Option 1:<\/strong> Neutralize the waste before pouring it into the waste container.<\/li>\n<li><strong>Option 2:<\/strong> Neutralize the mixture in the container on a set interval (e.g., at the end of each lab period, or after adding <em>x<\/em>-amount of waste to the container). \u00a0Be alert to the generation of heat.<\/li>\n<li><strong>Option 3:<\/strong> Neutralize\u00a0the final mixture in the container once the container is full\/no longer being filled. \u00a0Be alert to the generation of heat.<\/li>\n<li>&#8220;<strong>Neutralize<\/strong>&#8221; in this case means a <strong>pH between 5-9<\/strong>; the pH does not need to be 7. \u00a0Be alert to the generation of heat.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Record\u00a0the final container pH<\/strong> on the Hazardous Waste <a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-content\/blogs.dir\/83\/files\/2015\/04\/STO-Haz-Waste-Log-Sheet.docx\" target=\"_blank\" rel=\"noopener noreferrer\">Log Sheet<\/a>.<\/li>\n<li><strong>Record the total quantity<\/strong> (ml or mg) of each waste constituent in the container (sum the columns).<\/li>\n<li><strong>Removal of Container from Your Lab. \u00a0<\/strong>\n<ul>\n<li>Inform the CHO, who will remove the container, or<\/li>\n<li>You may bring your waste container and HW Log Sheet to RNS 253, 341, or 441. \u00a0\u00a0There are designated locations for different types of waste (liquids, solids, sharps, electronics, batteries):\n<ul>\n<li>RNS 341: shelves\u00a0near the elevator.<\/li>\n<li>RNS 253\/441: in the fume hood.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Remove all waste containers<\/strong> from your lab at least <strong>once per year<\/strong>, even if the container is not full.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<hr \/>\n<h4 style=\"text-align: center;\">FOR PURE, COMMERCIAL, OR UNKNOWN CHEMICALS:<\/h4>\n<span class=\"collapseomatic arrowleft\" id=\"id69e36856091bd\"  tabindex=\"0\" title=\"&lt;b&gt;Pure Chemicals or a Commercial Product&lt;\/b&gt;\"    ><b>Pure Chemicals or a Commercial Product<\/b><\/span><div id=\"target-id69e36856091bd\" class=\"collapseomatic_content \">\n<p>Pure Chemicals are\u00a0outdated or excess chemicals\u00a0that you no longer need. \u00a0Commercial Chemicals include\u00a0old paints, aerosols, glues,\u00a0etc., that you might purchase from Menards or other such suppliers (online or in person).<\/p>\n<ul>\n<li>Write\u00a0the following information on the <a href=\"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-content\/blogs.dir\/83\/files\/2015\/04\/STO-Haz-Waste-Log-Sheet.docx\" target=\"_blank\" rel=\"noopener noreferrer\">HW Log<\/a>:\n<ul>\n<li>On the &#8220;Room Location&#8221; line; include the Room Number &amp; Faculty member&#8217;s name.<\/li>\n<li>End Date.<\/li>\n<li>pH (if applicable).<\/li>\n<li>For a Pure Chemical: write down the substance name and (if applicable) concentration in the first column.<\/li>\n<li>For a Commercial Chemical: please provide the product name and manufacturer information (company name &amp; address, etc.). \u00a0You can write this information in the empty column headings or along the bottom of the sheet.<\/li>\n<li>Amount.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div><br class=\"none\" \/><span class=\"collapseomatic arrowleft\" id=\"id69e36856091f7\"  tabindex=\"0\" title=\"&lt;b&gt;If You Have a True Unknown Chemical&lt;\/b&gt;\"    ><b>If You Have a True Unknown Chemical<\/b><\/span><div id=\"target-id69e36856091f7\" class=\"collapseomatic_content \">\n<ul>\n<li>Download\u00a0the \u201cProcedures for Unknowns\u201d worksheet and perform as many steps as feasible.<\/li>\n<li>Bring\u00a0the completed worksheet and container to RNS 341.\n<ul>\n<li>The substance will be handled as an unknown or \u201climited known\u201d and labeled accordingly by the CHO.<\/li>\n<li>Disposal costs will surely be higher than if we had a known\u00a0list of ingredients; therefore, it is imperative that faculty always keep track of their containers and eliminate the production of \u201cunknowns.\u201d<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<p><!-- begin-migrated-from-panel-builder --><!-- end-migrated-from-panel-builder --><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Collect Your Waste Label Your Waste Dispose Your Waste Proper collection, identification, and storage of hazardous waste are\u00a0a critical functions\u00a0of operating a safe lab space, whether it be a teaching [&hellip;]<\/p>\n","protected":false},"author":156,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-4668","page","type-page","status-publish","hentry"],"acf":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/pages\/4668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/users\/156"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/comments?post=4668"}],"version-history":[{"count":18,"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/pages\/4668\/revisions"}],"predecessor-version":[{"id":5678,"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/pages\/4668\/revisions\/5678"}],"wp:attachment":[{"href":"https:\/\/wp.stolaf.edu\/chemical-hygiene\/wp-json\/wp\/v2\/media?parent=4668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}