The following features shall be incorporated into the design and construction of WWTPs for the protection of visitors and facility operations staff:

1. (a) Hand rails, guards, safety netting, and barricades around tanks, trenches, pits, stairwells, floor openings, maintenance access areas, and other hazardous structures;
2. (b) Gratings over areas of treatment units where access for maintenance is required;
3. (c) First aid equipment;

4. (d) Appropriately placed warning signs and labels as per the NFPA as incorporated by reference in the state fire code in Saf-C 6000 and NFPA 820, available as noted in Appendix B, and New Hampshire department of labor requirements as specified in Lab 1400 in, but not limited to, the following areas:

   1. (1) Slippery areas;
   2. (2) Non-potable water fixtures;
   3. (3) Low head clearance areas;
   4. (4) Open service manholes;
   5. (5) Hazardous chemical storage areas
   6. (6) Flammable fuel storage areas; and
   7. (7) Confined spaces;

5. (e) Personal protective clothing and equipment as per New Hampshire department of labor requirements as specified in Lab 1400, to include:

   1. (1) Eye, ear, and face protection;
   2. (2) Respiratory protection; and
   3. (3) Head, hand, and foot protection;
6. (f) Gas detectors for use in occupied areas rated under the NEC, as adopted by reference in the state building code pursuant to RSA 155-A:1, IV, as Class 1, Division 1, Group A, B, C, and D locations or areas classified as Class 1 Division 2 through the use of mechanical ventilation per the NFPA as incorporated by reference in the state fire code in Saf-C 6000 and NFPA 820, available as noted in Appendix B;
7. (g) Provisions and equipment for permit-required confined space entry in accordance with New Hampshire department of labor requirements as specified in Lab 1400;
8. (h) Ventilation of enclosures in accordance with the NFPA as incorporated by reference in the state fire code in Saf-C 6000 and NFPA 820, available as noted in Appendix B;
9. (i) Fire protection systems and equipment; and
10. (j) Machinery guards around belts or other moving parts.

Source. (See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06; ss by #10693, eff 10-15-14; ss by #14258, eff 7-1-25, EXPIRES: 7-1-35