7.0 Section F - Technical Specifications REV 2.0.pdf

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Attached to
Wildland Firefighting Helitanker Station_REBID
Solicitation number
SPD126-SPDAD-6422
Issued by
San Bernardino County, California

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This is a technical specifications document for the San Bernardino County Wildland Firefighting Helitanker Station Project, prepared by the San Bernardino County Department of Public Works - Special Districts. The project requires the installation of a permanent, open-top metal aerial refilling cistern with a capacity between 3,000 to 5,000 gallons, designed to support aviation firefighting units for internal and external tank refilling with an automated refill cycle of 6 to 10 minutes. The cistern must be engineered to withstand sustained winds exceeding 65 miles per hour and feature a snag-free design with an air-gap spillway to prevent damage to snorkels or buckets. Additionally, the project includes installation of a dechlorination system capable of treating 175 to 250 gallons per minute, a redundant solar-powered system with dual battery and solar panel sets, high-performance control valves, SCADA and cellular communication capabilities for remote activation and monitoring, and solar-powered LED lighting. The specifications also require a 12-inch Class 150 AC pipe hot tap water connection with a full backflow prevention system, a 6-inch ductile iron service line from the tank to the water main, and compliance with NFPA 24, AWWA C111/C153, and San Bernardino County Department of Public Works standards.

The project scope further includes site preparation consisting of a graded 25-foot by 25-foot pad with black woven weed fabric underlayment, ground contact edging confinement, and 3/4-inch to 1-inch gravel rock compacted to 95 percent density, or alternatively a concrete foundation if required by the tank system specifications. A permanent solar-powered LED aviation wind cone system is required, featuring a 10-foot mast with quick-detach electrical connections, an 18-inch by 6-foot orange and white fabric sock with internal LED flood and obstruction lighting, a 100-amp-hour battery backup system with charge controller, and associated mounting hardware. All contractors must submit shop drawings for approval, including stamped foundation drawings if a concrete pad is required, and conduct disinfection and fire flow testing per AWWA C651 and NFPA 291 standards before service activation.

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SECTION F

TECHNICAL SPECIFICATIONS

SAN BERNARDINO COUNTY

WILDLAND FIREFIGHTING HELITANKER STATION PROJECT

FOR

SAN BERNARDINO, CALIFORNIA

PROJECT NO.: 1378.0185

DEPARTMENT OF PUBLIC WORKS – SPECIAL DISTRICTS

SECTION F

CRITERIA AND PLAN PREPARATION

TABLE OF CONTENTS

SECTION

1.1 General Requirements

1.2 Cistern

1.3 Water Connection

1.4 Pads and Compaction

1.5 Aviation Wind Cone System

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. Tank must hold between 3,000 to 5,000 gallons, with automated refill of 6-10 minutes.

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

1.2.3 Snag-free design, built with air-gap spillway to prevent damage to snorkels or buckets. 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. 3.

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

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

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

1.2.7 Solar powered LED lighting interior and exterior of tank.

1.2.8 SCADA, Cellular, and/or RF capabilities for remote activation, low water level communications, and water level control float valve.

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

1.3 Water Connection

1.3.1 Hot Tap 12” Class 150 AC pipe with x.

1.3.2 System to have meter connection per County Standards.

1.3.3 All work shall comply with: NFPA 24 – Installation of Private Fire Service Mains and Appurtenances, AWWA C111/C153 – Ductile Iron Fittings and Joints, and

San Bernardino County Department of Public Works Standard Specifications.

1.3.4 Manifold Body: Ductile iron or stainless steel, epoxy-coated interior/exterior per

AWWA C550. Pressure rating: 150 psi minimum.

1.3.5 Fabrication and installation of full backflow prevention system. Backflow to include concrete pad and bollard perimeter for protection in accordance with

County standards within Section G.

1.3.6 Isolation Valve: Resilient-seated gate valve, mechanical joint, AWWA C509/C515 and County Standard Plan enclosed in Section G.

1.3.7 Service line from tank to water main to be 6-inch ductile iron pipe (DI), Class 350, AWWA C151.

1.3.8 Fittings: Mechanical joint, AWWA C111 and County Standard Plan enclosed in

Section G.

1.3.9 Thrust Blocks: Concrete per AWWA M41 and County Standard Plan enclosed in

Section G.

1.3.10 Disinfection per AWWA C651 before service

1.3.11 Conduct fire flow test per NFPA 291 after installation

1.3.12 Submit shop drawings for manifold, valves, and fittings,

1.3.13 Manufacturer certifications for compliance with AWWA/ NFPA standards

1.4 Pads and Compaction

1.4.1 Grade 25’ x 25’ area pad for cistern location.

1.4.2 Install black woven weed fabric and underlayment.

1.4.3 Install ground contact edging confinement system.

1.4.4 Fill graded area with 3/4 inch to 1 inch gravel rock.

1.4.5 95% Compaction of rock pad.

1.4.6 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.

1.5 Aviation Wind Cone System

1.5.1 Requirement of permanent Solar powered LED wind cone. Required to have 10-foot mast, quick detach electrical plugs, manual on/off 3-way switch. To include guy wires and multistakes.

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.

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