01320-4
SAFETY AND HEALTH PLAN
1.4 SITE-SPECIFIC INFORMATION
A. <A copy of the City of Nashua, New Hampshire Wastewater Treatment Facility
Confined Space Entry Program is included in Appendix A of these specifications.
B. Refer to Tables 1, 2 and 3 below.
TABLE 1
NASHUA WASTEWATER TREATMENT FACILITY
CONFINED SPACE LISTING
Confined Space Location
Hazard Description
Influent Channels
Possible lack of oxygen or presence of explosive or
hazardous gases - Hydrogen Sulfide.
Primary Clarifier -
Splitter Structure (while on-line)
Possible lack of oxygen or presence of explosive or
hazardous gases - Hydrogen Sulfide.
Sludge Tanks/Septage Receiving
Tanks /Grit Tank
Possible lack of oxygen or presence of explosive or
hazardous gases - Hydrogen Sulfide.
Chlorine Contact Tanks
Non-permit space with appropriate provisions
Gravity Thickener Tanks
Possible lack of oxygen or presence of explosive or
hazardous gases - Hydrogen Sulfide.
Sodium Hypochlorite Tank
Chemical hazards.
Sodium Bisulfite Tank
Chemical hazards.
Note: This list has been provided by the Owner based upon their knowledge of the site and may
not include all site hazards. Its intent is to aid the Contractor in determining the magnitude of
effort needed to fulfill the safety and health requirements of this Contract.
TABLE 2
NASHUA WASTEWATER TREATMENT FACILITY
ELECTRICAL HAZARD LISTING
Location
Headworks Room and Debris Loading Room
3-foot Envelop Around Surface of Raw Influent
Channels, Primary Clarifiers, Primary Effluent
Channels, Aeration Tanks, and Secondary
Clarifiers
Electrical Classification
Class 1, Division 1
Class 1, Division 1
Note: This list has been provided by the Owner based upon their knowledge of the site and may
not include all site hazards. Its intent is to aid the Contractor in determining the magnitude of
effort needed to fulfill the safety and health requirements of this Contract.
13089K
