WFHS-Section F-Technical Specification 6 of 7.pdf

SECTION F

TECHNICAL SPECIFICATIONS

WILDLAND FIREFIGHTING

HELITANKER STATION PROJECT

FOR

SAN BERNARDINO COUNTY

SAN BERNARDINO, CALIFORNIA

PROJECT NO.: 1378.0185

Technical Specifications for District Projects - 2

TECHNICAL SPECIFICATIONS FOR

SAN BERNARDINO COUNTY

WILDLAND FIREFIGHTING HELITANKER STATION

1.1 General Requirements

The County requires an aerial refilling cistern for aviation firefighting units to refill internal and external tanks.

1.2 Cistern

1.2.1 Cistern to be a permanent, open-top, metal tank. The tank must hold between 3,000 and 5,000 gallons, with an automated refill of 6-10 minutes. The available flow rate at the hot tap location is 800 GPM. Conduct flow testing to ensure the entire system is engineered to meet the performance criteria.

1.2.2 Tank built to withstand high winds sustained in excess of 65 MPH.

1.2.3 Snag-free design, built with an air-gap spillway to prevent damage to snorkels or buckets.

1.2.4 Installation of dechlorination system capable of removing total residual chlorine (TRC) from treated effluent prior to discharge or reuse. System to treat 175 to 250 GPM at discharge and at a minimum of 100 feet away from county water service well No. 5. Sample system attached in bidding documents.

1.2.5 Redundant solar-powered system, including dual sets of batteries and solar panels to ensure functionality during grid power failures.

1.2.6 Standard components include high-performance control valves (e.g., Cla-Val) and float assemblies for unattended refilling.

1.2.7 Solution must support Bambi-bucket and snorkel hose refilling.

1.2.8 Interior Coating: It is imperative to ensure that the interior coating of the water storage facility conforms to the NSF/ANSI Standard 61 certification for epoxy or glass-fused lining. This certification is essential for maintaining the purity of potable and retardant water.

1.2.9 Solar-powered LED lighting interior and exterior of tank.

1.2.10 RF remote activation, low water level communications, and water level control float valve. Manual activation to be included for both fill-up and discharge at tank site.

1.2.11 Submit shop drawings for tank and ancillary system as needed for approval.

1.2.12 Shore power to be pulled from pump house panel, available 120V 50amp.

Include code-compliant electrical connection to tank site for all project systems.

Technical Specifications for District Projects - 3

1.3 Water Connection and Flow Controls

1.3.1 Hot Tap 12” Class 150 AC pipe per County Standard Plans and Specifications.

1.3.2 All work shall comply with San Bernardino County Department of Public Works Standard Plans and Specifications.

1.3.3 Manifold Body: Ductile iron or stainless steel, epoxy-coated interior/exterior per County Standard Plan. Pressure rating: 150 psi minimum.

1.3.4 Fabrication and installation of full backflow prevention system. If an external backflow system is selected, include a concrete pad and bollard perimeter for protection in accordance with County standards within Section G.

1.3.5 Isolation Valve: Resilient-seated gate valve, mechanical joint, County Standard Plan enclosed in Section G.

1.3.6 Service line from tank to water main to be 6-inch ductile iron pipe (DI), Class

350. See Section G, Drawings, for the water line location and tie-in point.

1.3.7 Fittings: Mechanical joint, County Standard Plan enclosed in Section G.

1.3.8 Thrust Blocks: Concrete per County Standard Plan enclosed in Section G.

1.3.9 Submit shop drawings for manifold, valves, fittings, and connection.

1.4 Pads and Compaction

1.4.1 Grade 200’ x 200’ area pad for cistern location and safety area fencing.

1.4.2 Install black woven weed fabric and underlayment.

1.4.3 Fill graded area with 3/4 inch to 1 inch gravel rock within cistern footprint. 3” or larger rock to be used beyond the cistern footprint up to the fence line for dust control and rotor wash. Fence to be used as edging confinement.

1.4.4 95% Compaction of rock pad.

1.4.5 If required by tank system, concrete pad is to be installed in lieu of rock pad.

Concrete foundation to be submitted via stamped shop drawings. See Section A Itemized Bid Proposal Additive. If a concrete pad is not required for the selected tank system, please add a “$0” cost under the additive line item.

1.4.6 Perimeter Chain Link Fencing and 20’ Double Entry Gate to be 2” opening 9 Gauge mesh fabric at 6 ft tall per County Standard. No slats required.

Technical Specifications for District Projects - 4

1.5 Aviation Wind Cone System

1.5.1 Requirement of permanent solar-powered LED wind cone. Required to have a 10-foot mast, quick-detach electrical plugs, and a manual on/off 3-way switch. To include guy wires and multi-stakes. Wind cone to conform to FAA

AC 150/5340-30J.

1.5.2 System to have 18”x6’ orange and white fabric sock, internally lighted LED flood and LED obstruction light 12VDXC with steel hinged pole.

1.5.3 Energy control system to include solar panel backup, 100 Ahr battery, Charge Controller, quick-detach charging system, and mounting bracket.

1.5.4 LED luminaire includes Solar L810 OB Light and mounting plate.

END OF TECHNICAL SPECIFICATIONS