2000 TOWER ST ARTS AND SCIENCES BLDG 2018-01-02 MF Import

.C) Leave the hood "on" when it is not in active use if toxic substances are stored in it or if .., is uncertain whether adequate general laboratory ventilation will be maintained when it is "off' (200). (DD) Vigilance: Be alert to unsafe conditions and see that they are corrected when detected (22). (EE) Waste disposal: Assure that the plan for each laboratory operation includes plans and training for waste disposal (230). (FF) Deposit chemical waste in appropriately labeled receptacles and follow all other waste disposal procedures of the chemical hygiene plan (22, 24). (GG) Do not discharge to the sewer concentrated acids or bases (231); highly toxic, malodorous, or lachrymatory substances (231); or any substances which might interfere with the biological activity of waste water treatment plants, create fire or explosion hazards, cause structural damage, or obstruct flow (242). (HH) Working alone: Avoid working alone in a building; do not work alone in a laboratory if the procedures being conducted are hazardous (28). Vorking with allergens and embryotoxins. (A) Allergens (examples: Diazomethane, isocyanates, bichromates): Wear suitable gloves to prevent hand contact with allergens or substa, ces of unknown allergenic activity (35). (B) Embryotoxins (34-5) (examples: Organomercurials, lead compounds, formamide): Women of childbearing age shall handle these substances only in a hood whose satisfactory performance has been confirmed, using appropriate protective apparel (especially gloves) to prevent skin contact. (C) Review each use of these materials with the research supervisor and review continuing usr . annually or whenever a procedural change is made. (D) Store these substances, properly labeled, in an adequately ventilated area in an unbreakable secondary container. (E) Notify supervisors of all incidents of exposure or spills; consult a qualified physician when appropriate. (iii) Work with chemicals of moderate chronic or high acute toxicity. Examples: diisopropyl!lurophosphate (41), hydrofluoric acid (43), hydrogen cyanide (45). (iv) Supplemental rule: to be followed in addition to those mentioned above (Procedure B of "prudent practices," pp. 39-41): (A) Aim: To minimize exposure to these toxic substances by any route using all reasonable precautions (39). (R) Applicability: These precautions are appropriate for substances with moderate chronic or high acute toxicity used in significant quantities (39). (C) Location: Use and store these substances only in areas of restricted access with special waming signs (40, 229). (D) Always use a hood (previously evaluated to confirm adequate performance with a face velocity of at least 60 linear feet per minute) (40) or other containment device for procedures which may result in the generation of aerosols or vapors containing the substance (39); trap released vapors to prevent their discharge with the hood exhaust (40). Chemical Hygiene Plan for Everett Community College, page 18 (E) Personal protection: Always avoid skin contact by use of gloves and long sleeves (and other protective apparel as appropriate) (39). Always wash hands and arms immediately after working with these materials (40). 18