MIL-HDBK-1003/1
APPENDIX H (Continued)
should be waterproof per NEMA Class 3. ES/EWS alarm systems in hazardous (classified) locations, per National Electric Code, should be listed and labeled for that purpose. Alarm audible signal devices should have a distinct sound, different from other alarms in this and adjacent facilities. Mount alarm audible signal device, silencing switch, and strobe light on wall or ES/EWS column, immediately above the level of the shower head.
Alarms protect people by promptly summoning help, and protect stored materials, equipment, and facilities by indicating or reporting ES/EWS activation, with its attendant waterflow.
3. FLOOR DRAINS - Floor drains for ES/EWS are not required by the International Plumbing Code (IPC) 1997 edition, see Section 411.
a. Owners and occupants prefer floor drains, for housekeeping and for material and facility protection reasons.
The floor drain may become a source of illicit disposal of prohibited substances. Careful supervision will be necessary.
b. Floor drains may be provided. The Environmental Protection Agency regulation, 40 CFR 261, describes " ...the following mixtures of solid wastes and hazardous wastes listed in Subpart D are not hazardous wastes..." "..."de minimis" losses include ..." "...discharges from safety showers and rinsing and cleaning of personal safety equipment;...". Therefore, ES/EWS discharges may be drained to the sanitary sewer system, as they are "de minimis" losses.
c. Floor drains, where provided, should comply with the following:
1) Minimum capacity of 45 gallons per minute water flow, based upon 1.5 times the ANSI Z 358.1 standard water flow minimum requirement.
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