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■ <br /> 9A <br /> ■ <br /> a■■. <br /> ■ <br /> American Association <br /> of Chemistry Teachers <br /> Chemistry Solutions <br /> MAY 20151 NUTS&BOLTS <br /> Managing Chemical Wastes in the High School Lab <br /> By.;ennifer Panther Bishoff <br /> When it's time to dispose of chemicals in the laboratory, high school teachers have many sources for <br /> proper disposal guidelines... perhaps too many sources, if you ask me. While researching disposal <br /> issues for my own lab, I discovered that many colleges and universities have their own carefully <br /> designed protocols—and some even have people specifically tasked with overseeing the process and <br /> answering related questions. <br /> Unfortunately, many high school teachers do not have such helpful guidance and resources. If your <br /> school's or district's Chemical Hygiene Plan (CHP) does not clearly outline disposal procedures (or if it <br /> doesn't have a formal CHP to begin with), you may face a lengthy and frustrating process for finding <br /> the information you need to clean up your lab. This is especially true for teachers who don't have a <br /> chemistry degree;vague recommendations to "weed out oxidizers" or "look up hazardous chemicals" <br /> don't mean much if you can't remember the necessary terminology or don't have a strong chemistry <br /> background. <br /> Some reasons to dispose of a chemical <br /> 1. It is expired. Many companies now print expiration or purchase dates on their chemicals. Fisher <br /> Scientific recommends disposal after five years. <br /> 2. Its condition has degraded. For exampie, if a hygroscopic chemical has taken on water, or a <br /> container was not sealed properly, disposal is recommended. <br /> 3. You don't use/need it. Keep track of the chemicals you use in demonstrations and labs, and <br /> dispose of those no longer required. <br /> 4 It rnrriPc hn7nrrlc to vniir Inhnrntnni inctnirtinn that ntitwPinh the hPn,-fitc <br />