Section Env-Wq 708.21 - Hazardous Chemical Handling(a) The materials used for storage, piping, valves, pumping, metering, and splash guards shall be specially selected so as to be compatible with the physical and chemical characteristics of each hazardous or corrosive chemical that will be used at the WWTP.(b) Chemical storage areas shall be enclosed in dikes or curbs that will contain the stored volume until the spilled chemical can be safely transferred to alternative storage or released to the wastewater at controlled rates that will not damage facilities, inhibit the treatment processes, or contribute to stream pollution.(c) Eye wash fountains and deluge showers using potable water shall be: (1) Provided in the laboratory and on each floor or work location involving hazardous or corrosive chemical storage, mixing or slaking, pumping, metering, or transportation loading;(2) As close as practicable to possible chemical exposure sites; and(3) Fully usable during all weather conditions.(d) Eye wash fountains, including self-contained eye wash fountains and eye wash stations, and deluge showers shall be designed in compliance with the ANSI/ISEA Z358.1 standard in effect at the time of the eye-wash fountain or deluge shower specification and available as noted in Appendix D. If the water heater system for the eye wash fountains and deluge showers is not separate from the WWTP hot water supply, mixing valves with scald protection shall be provided to maintain the required water temperature.(e) All piping containing or transporting corrosive or hazardous chemicals shall be identified with labels every 10 feet and with at least 2 labels in each room, closet, or pipe chase. Pipes containing hazardous or corrosive chemicals shall not be located above shoulder level except where continuous drip collection trays and coupling guards will eliminate chemical spray or dripping onto personnel.(f) All pumps, feeders, connections, and couplings for hazardous or corrosive chemicals shall have guards that will effectively prevent spray of chemicals into space occupied by personnel. The splash guards shall be in addition to guards intended to prevent injury from moving or rotating machinery parts.(g) All hazardous waste generated shall be managed in accordance with RSA 147-A and Env-Hw 100-1100.N.H. Code Admin. R. Env-Wq 708.21
Adopted byVolume XXXIV Number 46, Filed November 13, 2014, Proposed by #10693, Effective 10/15/2014, Expires10/15/2024.