Siphon Cleaning Services at the Winnipesaukee River Basin

EXHIBIT B
THE SERVICES
SCHEDULED SERVICES
Cleaning of the dual influent channels at the Winnisquam Pump Station located at 202 Water Street in Laconia,
removal of grit from one raw and one degritted septage tank located at the Franklin wastewater treatment
plant, several stormwater catch basins, and two inverted siphons and their associated inlet and outlet chambers
which are located throughout the Winnipesaukee River Basin Program's collection system. The siphons have
either two or three pipes which cross under a river. On either bank of the river, there exists an access chamber
to each inverted siphon to provide access for cleaning. Siphon pipe sizes vary from as small as 6" in diameter to
as large as 12" in diameter. The WRBP will provide one member of its staff to accompany the contractor during
all work.
Semi-annual cleaning
Semi-annual cleaning will typically be performed during the months of May and October. Any alternative
schedule shall be approved by the WRBP prior to work. The contract includes: two cleanings of the two (2)
siphons; removal of grit from one (1) septage receiving and one (1) degritted septage tank; three (3) storm
water catch basins; and the pair of influent channels in fiscal year 2026 (in October of 2026 and May of 2027), in
fiscal year 2026 (in October of 2026 and May of 2027), and in fiscal year 2027 (October 2027 and May 2028).
Note that each siphon cleaning event must include pressure washing of the inside of each siphon chamber on
both ends of the inverted siphons as well as flushing of siphon pipes.
Semi-annual grit removal from one (1) raw septage receiving tank and one (1) degritted septage tank, both tanks
are approximately 17 feet 6 inches in depth with an access opening of 4 feet by 4 feet. A total of approximately 2
yards has been removed each time the grit has been removed from both tanks. Contractor is responsible for
removing all grit regardless of volume. The grit will be deposited on site at the Franklin treatment plant, and the
WRBP will be responsible for its disposal.
There are several storm water catch basins which will have their sumps vactored clean. There are two (2) catch
basins at the Franklin treatment plant and one (1) at the Winnisquam pump station at 202 Water Street in
Laconia, which are subjected to heavier use than the others; therefore, they will be cleaned more frequently on
a scheduled basis. The two (2) in Franklin and the one (1) catch basin in Laconia are to be cleaned semi-annually,
at the same time as the siphon chamber cleanings.
Semi-annual cleaning locations:
1) Franklin area at Senior Haven - under the Winnipesaukee River - 1 barrel at 6 inches in diameter and 1
barrel at 10 inches in diameter approximately 530 feet long.
2) Belmont area at NH Route 140 - under Tioga River - 1 barrel at 6 inches in diameter and 1 barrel at 12
inches in diameter approximately 55 feet long.
3) Franklin Treatment Plant grit removal from 1 raw septage tank and 1 degritted septage tank.
4) Winnisquam pump station at 202 Water Street, Laconia - influent channels - 2 open channels 30 inches
wide and approximately 31 feet long
5) Two (2) catch basins at the Franklin wastewater treatment plant and one (1) at the Winnisquam pump
station
One-time only cleaning:
The ten (10) catch basins at the wastewater treatment facility (WWTF) in Franklin will receive a one-time only
cleaning in October 2026.
Exhibit B Page 1 of 3
Initials __________
Date___________

All work to be completed to the satisfaction of the WRBP staff who will accompany the contractor at the work
locations.
UNSCHEDULED SERVICES
Unscheduled services will be paid under the terms outlined in Exhibit C of this Agreement. Contractor shall
provide services per the regular and overtime per hour rate for a vactor truck including labor (2 men) and the
minimum number of hours or service charge for unscheduled vactor services. Fuel surcharges, travel,
mobilization/demobilization, and any other charges are included in the hourly rates delineated in Exhibit B.
CONTRACTOR RESPONSIBILITIES
The contractor shall provide all labor, materials, services, tools, equipment, transportation, and facilities to
complete the scope of work. It shall be the sole responsibility of the contractor awarded the contract to comply
with all local, state and federal rules and regulations in the commission of the work requested by this proposal.
The material removed from the catch basins, tanks, channels, and siphon chambers will be transported to the
Franklin Wastewater Treatment Plant for disposal. It will be the plant's responsibility to dispose of the material
in accordance with all applicable federal, state and local regulations governing such waste. All work shall be
performed in a neat and workmanlike manner in conformance with best modern trade practices by competent,
experienced workers. All equipment used shall be operated in strict accordance with the manufacturer's
instructions. The contractor will be solely responsible for errors or omissions.
Work must be completed during normal treatment plant working hours of Monday-Friday, 7:00 A.M. to 3:00
P.M. The WRBP facilities are closed on State Holidays.
SAFETY
The WRBP operates an active safety program, with a safety committee and safety manual that augments NHDES
Safety requirements. The selected contractor shall comply with all WRBP safety rules, in addition to all
applicable state and federal worker safety laws and regulations, including those dealing with confined spaces.
The siphon chambers manholes are confined spaces (permit required) as per OSHA definition in 29 CFR Part
1910 and the NH Department of Labor Safety Regulations. Attached is Figure 7.3 taken from the WRBP's
confined space policy which shows expected hazards and required precautions for these confined spaces. Prior
to beginning work, the contractor must provide WRBP with a copy of the confined space program that the
contractor intends to follow or provide details of the contractor's confined space program. Exhibit A of the
contract contains a Certification Statement from the contractor stating compliance with OSHA confined space
regulations. The contractor is responsible for all the safety equipment and procedures required in Figure 7.3,
OSHA, and the contractor's confined space program.
Information contained in the Request for Proposals, dated March 23, 2026, is hereby included in Exhibit B by
reference.
Exhibit B Page 2 of 3
Initials __________
Date___________