SOW_EP_Solid_Waste_LS_Upgrade.pdf

E X P E R I E N C E Y O U R A M E R I C A The National Park Service cares for special places saved by the American people so that all may experience our heritage.

El Portal Utilities Upgrade Controls El Portal Solid Waste (Main) Lift Station

Yosemite National Park

Objective National Park Service Yosemite desires to solicit a request for quote to qualified vendors to overhaul and upgrade control components in main lift station in El Portal, California.

Background El Portal Wastewater Treatment Plant (EPWWTP) has the capacity to treat up to 1 million gallons of sewage per day. High flows are between May thru October, flows are at their lowest between January and February. Weather can range from mid-teens in the winter months and exceed 120 degrees F in summer months.

There are 5 lift stations leading to the wastewater treatment plant. The El Portal Solid Waste Lift Station pumps the most flows throughout the year. The lift station is located near storm drains and the Merced Wild and Scenic River.

The current control board was installed in 1985 and has ceased functioning. Relays for float control have failed rendering the pumps fully on or fully off, no intermittent pumping is occurring. In 1998, contactors, breakers and control boxes were replaced, but main control board was not upgraded at this time. Summer of 2021, issues with overheating the main breaker occurred and was replaced.

Project Description The contractor will be responsible for removal of old control panel and installation of a new lift station control panel. Contractor to provide all tools, materials and equipment to replace old controller and install a new Solid state multi-pump controller with adjustable set points, such as MPE SC1000 or equal.

New controls and components shall be installed to full functionality and connected to the existing “High/Low Flow” alarm set point. The contractor will interconnect as needed with existing circuitry and test operation of all the equipment

The Contractor shall furnish and install a control panel suitable for the horsepower and voltage specified for the lift station. The panel stand shall be large enough to also mount the disconnect switch, the meter base, and remote monitor.

• The panel shall be a rain-tight stainless steel NEMA 4 460v 3 phase duplex

Yosemite National Park Utilities Branch

P.O. Box 700-W El Portal, CA 95318 209-379-1055

National Park Service U.S. Department of the Interior

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

• The panel shall be supported on stainless steel (for stainless steel panels) supports.

• The door shall be hinged and have a blank face with provisions for locking with a padlock. D

• The electrical components, switches, relays, timers, and other circuitry shall be located inside the control panel.

• The panel shall be UL listed.

• Terminal boards for connection of power, pumps, alarms and level sensors shall be provided.

• All controls shall be located above ground.

• A transformer to provide 120-volt, 24 volt and/or 4-20 milliamp power for control panel pilot circuitry, control and alarms circuits shall be provided and installed.

• Panel Air Conditioner shall be included (panel A/C shall meet the size of new control panel)

• The contractor shall furnish park a one-year warranty of parts and labor upon acceptance.

• Additional parts to include but not limited to: Enclosure 36”x30”x12” 304 SS, Dead front inner door, Three-point latch, Nema motor starters, Solid state overloads, Control breaker, 5 extra single pole breakers, Motor breaker, Receptacle, MPE Controller SC1000, 2 Floats for back up, pressure transducer for primary station control. Alarm Horn, Alarm light, Alarm Silence, AMMeter W/CT’S ETM, Grd fault recept, Heater/ thermostat 50watt strip, Intrinsic Barrier, Intrinsic relays, MPE PMR2, Level lights, Nema HOA, Nema 4 pilot lights, Phase monitor, Resets, Run Lights, surge arrestor, Thermal terminals, TD Relays, T3000D1 3 KVA, There are two (2) Flygt pumps at approximately 15 feet below grade. Each of these pumps are 10HP and are not to be replaced with this contract.

The system shall not be shut down for longer than twelve hours. If the contractor requires longer than a twelve-hour shutdown to perform the work, the contractor shall install a sewer bypass to divert the flow and maintain uninterrupted services to the sewage line during the ongoing repair activities. If required, National Park Service (NPS) employees can be on standby with a pumper truck.

Contractor will be responsible for removal and proper disposal of all old equipment. Any gaskets, adhesives, lubricants, or incidental parts will be furnished by the contractor.

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

Delivery It is anticipated that the controls can be built off site and work shall be completed no later than August 15th, 2022.

Contact: Attn: George Harders, El Portal Utilities Supervisor 5083 Foresta Road El Portal, CA 95318 209-379-1828

Additional Contact: Katie Bablitch, Facility Operations Specialist, 209-628-6254

ON-SITE WORK HOURS: Work shall be generally performed during normal business working hours of 8 a.m. to 5 p.m., Monday through Friday, except when otherwise indicated. No holiday will be allowed.

BEAR/ ANIMAL SAFETY: Bears and other animals are active in Yosemite and surrounding areas. It is necessary for all visitors to practice bear and animal safety. Food items are not to be left in work trucks or anywhere else. The NPS provides bear boxes in campgrounds for food storage. Bear incidents are a ticketable offense in Yosemite.

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

Control Board

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

Contactors and Breakers

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

Main Breaker

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

Site of Panel

Replacement of 460v 3 phase duplex control panel. New panel shall be compatible with existing lift station equipment. New controls and components shall be installed to full functionality and connected to the existing “High/Low Flow” alarm set

With key components