Attachment 9 - Priority Recommendations.pdf

Final Cross-Connection Control Survey Memorandum Report, DMAFB May 2019 Page D-4 Table D-1. Priority Recommendations and Cost Estimates, Davis-Monthan AFB

URS Group, Inc.

Facility Num. Facility Name CC Owner CC ID CC Location Hazard / Cross- Connection

Degree of Hazard

Pipe Size (in)

Isolation or Containment BP Type BP Size

(in.)

Height

(ft) Priority

Category System Type Deficiency Recommendation

74 General James H Doolittle Center CES Utilities 74-A 1st Floor, Mechanical

Room Building Supply Low 3 Containment LFRP_REQ 3 10 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer at an accessible height (1-5 ft) for testing and maintenance. Install drain line to floor drain.

130 Maintenance Operations Facility CES Utilities 130-A

1st Floor, Mechanical Room, S Side of Building

Building Supply Low 3 Containment LFRP_REQ 3 1 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer.

251 SP Kennel CES Utilities 251-A Inside Walkway Ceiling Building Supply High 2 Containment LFRP_REQ 2 8 1 Containment Unprotected building supply line fed from

Building 250 located inside walkway ceiling.

Install an approved LFRP with an upstream wye strainer outside with approved freeze protection.

Install unit at an accessible height (1-5 ft) for testing and maintenance.

400 Hospital FSI 400-A 1st floor, Mechanical Room, Room 105 Building Supply High 4 Containment LFRP_REQ 4 6 1 Containment Unprotected building supply bypass to 400-

2.

Install an approved LFRP with an upstream wye strainer at an accessible height (1-5 ft) for testing and maintenance.

401 355th Medical Group Mechanical Plant FSI 401-A Basement, Next to

Tunnel to Building 400 Building Supply High 4 Containment LFRP_REQ 4 7 1 Containment Unprotected building supply line.

Install an approved LFRP with an upstream wye strainer at an accessible height (1-5 ft) for testing and maintenance.

1540 355th Communications Squadron CES Utilities 1540-A

1st Floor, Mechanical Room, E Side of Building

Building Supply Low 6 Containment LFRP_REQ 6 1 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer.

2446 Shoppette and Auto Center CES Utilities 2446-A

1st floor, Electrical Room, S Side of Building

Building Supply High 2 Containment LFRP_REQ 2 0 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer.

2612 Dorothy H Finley Child Development Center CES Utilities 2612-A

1st Floor, Mechanical Room, E Side of Building

Building Supply High 3 Containment LFRP_REQ 3 0 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer.

355th FSS / Mission Support Group Headquarters

CES Utilities 3200-A Could Not Locate Building Supply Low 2 Containment LFRP_REQ 2 Unknown 1 Containment

Could not locate building water supply line.

Recommendation assumes there is no BFPA on the supply line and provides an estimate of the line size. The facility is considered low hazard due to facility activities;

however, high hazard cross-connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer. It is assumed the unit will need to be installed outside in an insulated enclosure.

3205 Desert Dover Chapel CES Utilities 3205-A Outside, Near Mech Room Building Supply Low 2 Containment LFRP_REQ 2 1 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer outside with approved freeze protection.

3208 Hope Chapel CES Utilities 3208-A 1st Floor, Mechanical Room Building Supply Low 2 Containment LFRP_REQ 2 2 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer.

Facility Information Cross-Connection Information BP Information Backflow Recommendation

Page D-5 Table D-1. Priority Recommendations and Cost Estimates, Davis-Monthan AFB

URS Group, Inc.

Facility Num. Facility Name CC Owner CC ID CC Location Hazard / Cross- Connection

Degree of Hazard

Pipe Size (in)

Isolation or Containment BP Type BP Size

(in.)

Height

(ft) Priority

Category System Type Deficiency Recommendation

Facility Information Cross-Connection Information BP Information Backflow Recommendation

4300 CE SABER CES Utilities 4300-A 1st Floor, Mechanical Room Building Supply Low 4 Containment LFRP_REQ 4 3 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer.

4809 A-10 Maintenance Dock CES Utilities 4809-A 1st floor, Mechanical Room, Between Bays 3 and 4

Building Supply High 2.5 Containment LFRP_REQ 2.5 1 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer.

4809 A-10 Maintenance Dock CES Utilities 4809-B 1st Floor, Mechanical Room, Between Bays 1 and 2

Building Supply High 2.5 Containment LFRP_REQ 2.5 2 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer. Install drain line to floor drain.

4816 Federal Aviation Administration CES Utilities 4816-A 1st Floor, Mechanical

Room Building Supply Low 2 Containment LFRP_REQ 2 1 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer.

4820 Base Operations CES Utilities 4820-A NE Side of Building Building Supply Low 2 Containment LFRP_REQ 2 2 1 Containment

Unprotected building supply line. The facility is considered low hazard due to facility activities; however, high hazard cross connections are present within the building elevating the overall hazard of the building.

Install an approved LFRP with an upstream wye strainer outside with approved freeze protection.

4844 C-130 Maintenances CES Utilities 4844-A SE Side of Building Building Supply High 2 Containment LFRP_REQ 2 2 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer outside with approved freeze protection.

5245 CMS Propulsion Shop CES Utilities 5245-A 1st Floor, Mechanical Room Building Supply High 2 Containment LFRP_REQ 2 2 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer.

5245 CMS Propulsion Shop CES Utilities 5245-D Bay Area Wash Rack Building Supply High 3 Containment LFRP_REQ 3 1 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer.

5607 355th Weapons Maintenance CES Utilities 5607-B 1st Floor, Mechanical

Room Building Supply High 2.5 Containment LFRP_REQ 2.5 1 1 Containment Unprotected building supply line. Install an approved LFRP with an upstream wye strainer.

400 Hospital FSI 400-F 1st Floor, Room 363 Dental Equipment Low 0.25 Isolation DUAL CHK ATM_REQ 0.25 1 1 Dental Equipment Unprotected supply to water filtration system used for dental chair water containers. Install a dual check with atmospheric vent.

400 Hospital FSI 400-G 1st Floor, Dental Lab Dental Equipment Low 0.38 Isolation DUAL CHK ATM_REQ 0.38 4 1 Dental Equipment Unprotected supply line to dental plaster grinder. Install dual check with atmospheric vent.

1540 355th Communications Squadron CES Utilities 1540-E NE Side of Building Swamp Cooler Supply

Line High 0.75 Isolation RP_REQ 0.75 2 1 Heating and Cooling Systems Unprotected supply line to swamp cooler. Install an approved RP with an upstream wye strainer outside with approved freeze protection.

2446 Shoppette and Auto Center CES Utilities 2446-C S Side of Building, in

Brick Enclosure Swamp Cooler Supply Line High 0.38 Isolation RP_REQ 0.38 1 1 Heating and Cooling

Systems Unprotected supply line to swamp cooler. Install an approved RP with an upstream wye strainer outside with approved freeze protection.

5245 CMS Propulsion Shop CES Utilities 5245-B Bay, N Wall Swamp Cooler Supply Line High 0.5 Isolation RP_REQ 0.5 1 1 Heating and Cooling

Systems Unprotected supply line to eleven swamp coolers.

Install an approved RP with an upstream wye strainer. Install on common supply line. OR Install an approved RP with an upstream wye strainer on supply line to each swamp cooler.

5607 355th Weapons Maintenance CES Utilities 5607-C SE Corner of Building Swamp Cooler Supply

Line High 0.5 Isolation RP_REQ 0.5 3 1 Heating and Cooling Systems Unprotected supply line to swamp cooler. Install an approved RP with an upstream wye strainer outside with approved freeze protection.

5607 355th Weapons Maintenance CES Utilities 5607-D SE Corner of Building Swamp Cooler Supply

Line High 0.5 Isolation RP_REQ 0.5 3 1 Heating and Cooling Systems Unprotected supply line to swamp cooler. Install an approved RP with an upstream wye strainer outside with approved freeze protection.

Page D-6 Table D-1. Priority Recommendations and Cost Estimates, Davis-Monthan AFB

URS Group, Inc.

Facility Num. Facility Name CC Owner CC ID CC Location Hazard / Cross- Connection

Degree of Hazard

Pipe Size (in)

Isolation or Containment BP Type BP Size

(in.)

Height

(ft) Priority

Category System Type Deficiency Recommendation

Facility Information Cross-Connection Information BP Information Backflow Recommendation

4809 A-10 Maintenance Dock CES Utilities 4809-C 1st Floor, Maintenance Bays 1, 2, 3, and 4 High Hazard Hose Bib High 0.75 Isolation RP_REQ 0.75 3 1 Industrial Water

Usage

Unprotected supply lines to four high hazard hose bibs used to operate portable swamp coolers. Drainage in area where RP is to be installed is insufficient.

Install an approved RP with an upstream wye strainer. Install RP on common supply line. Label hose bibs as "Non-Potable." Install drain line through the exterior wall to drain outside. OR Install an approved RP with an upstream wye strainer on the supply line to each hose bib.

4809 A-10 Maintenance Dock CES Utilities 4809-D Bay 4, Back Wall High Hazard Hose Bib High 0.75 Isolation RP_REQ 0.75 6 1 Industrial Water Usage

Unprotected supply line to high hazard hose bib and filter / POU drinking water system.

Drainage in area where RP is to be installed is insufficient.

Install a dedicated line to the filter system with an approved LFRP and an upstream wye strainer. AND Install another approved RP with an upstream wye strainer downstream of tee for filter system to protect against high hazard hose bib. Install drain line through the exterior wall to drain outside. Label hose bib as "Non-Potable".

4809 A-10 Maintenance Dock CES Utilities 4809-E SE Corner of Building, Back of Bay 4 High Hazard Hose Bib High 0.75 Isolation RP_REQ 0.75 2 1 Industrial Water

Usage Unprotected supply line to two high hazard hose bibs.

Install an approved RP with an upstream wye strainer outside with approved freeze protection.

Install RP on common supply line. Label hose bibs as "Non-Potable".

4844 C-130 Maintenances CES Utilities 4844-B NE Corner of Bay High Hazard Hose Bib High 0.5 Isolation RP_REQ 0.5 1 1 Industrial Water Usage

Unprotected supply line to high hazard hose bib used to fill portable swamp cooler and sink. Hose is currently laying in sink. A domestic water heater is located downstream of the hose bib. No floor drains present.

Install an approved RP with an upstream wye strainer. Disconnect hose from sink when not in use.

Reroute the supply line to the domestic water heater to be upstream of the BFPA. Label hose bib as "Non- Potable." Improve drainage in area where RP is to be installed.

5245 CMS Propulsion Shop CES Utilities 5245-C 1st Floor, Propulsion Shop, Flightline Side of Building

High Hazard Hose Bib High 0.75 Isolation RP_REQ 0.75 4 1 Industrial Water Usage

Unprotected supply line to high hazard hose bib connected to parts washer.

Install an approved RP with an upstream wye strainer. Label hose bib as "Non-Potable."

5245 CMS Propulsion Shop CES Utilities 5245-E Bay Area Wash Rack High Hazard Hose Bib High 0.75 Isolation RP_REQ 0.75 2 1 Industrial Water Usage

Unprotected hot and cold water supply lines to 3 total high hazard hose bibs connected to pressure washers.

Install an approved, hot water rated RP with upstream wye strainer on the hot water supply line.

Install an approved RP with an upstream wye strainer on the cold water supply line. "Label hose bibs as Non-Potable."

5607 355th Weapons Maintenance CES Utilities 5607-A 1st Floor, Maintenance

Bay High Hazard Hose Bib High 0.75 Isolation RP_REQ 0.75 2 1 Industrial Water Usage

Unprotected supply line to high hazard hose bib connected to a port-a-cool. No floor drains present.

Install an approved RP with an upstream wye strainer. Label hose bib as "Non-Potable." Improve drainage in area where RP is to be installed.

2612 Dorothy H Finley Child Development Center CES Utilities 2612-C 1st Floor, Kitchen Dishwasher, Commercial High 0.5 Isolation RP_REQ 0.5 0 1 Kitchen Equipment Unprotected supply line to commercial dishwasher.

Install an approved, hot water rated RP with an upstream wye strainer.

2612 Dorothy H Finley Child Development Center CES Utilities 2612-D 1st Floor, Kitchen, E

Wall Food Grinder High 0.5 Isolation RP_REQ 0.5 2 1 Kitchen Equipment Unprotected supply line to food grinder. Install an approved, hot water RP with an upstream wye strainer.

400 Hospital FSI 400-C 1st Floor, Laboratory Medical Equipment High 0.38 Isolation RP_REQ 0.38 4 1 Medical Equipment Unprotected supply line to water softener, which feeds a blood analytical machine.

Install an approved RP with an upstream wye strainer.

400 Hospital FSI 400-14 Room 38C Unknown High 0.5 Isolation DC 0.5 1 1 Miscellaneous

No access to equipment that is connected to BFPA. Existing unit is protecting an unknown hazard. Existing unit does not have an upstream wye strainer. Due to limited access, the recommendation assumes the hazard is considered high.

Determine hazard the unit is protecting. If high hazard, install an approved RP with an upstream wye strainer. If low hazard, keep existing unit and install an upstream wye strainer.

2446 Shoppette and Auto Center Vendor 2446-7

1st Floor, Employees Only Store Room, Under Counter to Right of Beverage Dispenser

Carbonator High 0.5 Isolation DC 0.5 3 2 Carbonated Beverage Dispensers

Existing unit provides insufficient protection for carbonated beverage dispensers. Existing unit is installed behind the counter and is not readily accessible for testing and repair.

Replace existing unit with an approved stainless steel RP with an upstream wye strainer. Install unit in an accessible location with sufficient clearance around the unit for testing and maintenance.

Page D-7 Table D-1. Priority Recommendations and Cost Estimates, Davis-Monthan AFB

URS Group, Inc.

Facility Num. Facility Name CC Owner CC ID CC Location Hazard / Cross- Connection

Degree of Hazard

Pipe Size (in)

Isolation or Containment BP Type BP Size

(in.)

Height

(ft) Priority

Category System Type Deficiency Recommendation

Facility Information Cross-Connection Information BP Information Backflow Recommendation

2446 Shoppette and Auto Center CES Utilities 2446-D N Side of building, Right of Entrance Glacier Water Filler Low 0.38 Isolation DUAL CHK ATM 0.38 4 2 Domestic Water Usage

Supply line fed from hose bib. Existing unit provides insufficient protection for Glacier Water Filler.

Create a supply line off of the main supply line.

Replace existing unit with an approved LFDC with an upstream wye strainer outside with approved freeze protection.

3205 Desert Dover Chapel CES Utilities 3205-1 1st Floor, Mechanical Room, E Side of Building

Boiler and Chiller, Make-Up High 1 Isolation RP 1 4 2 Heating and Cooling

Systems RP relief valve is leaking. Existing unit does not have an upstream wye strainer.

Test RP. Repair or replace unit, as necessary. When existing unit is repaired or replaced, install an upstream wye strainer.

5607 355th Weapons Maintenance CES Utilities 5607-2 1st Floor, Mechanical

Room Boiler and Chiller, Make-Up High 0.75 Isolation RP 0.75 4 2 Heating and Cooling

Systems

RP relief valve is leaking. Insufficient air gap between relief valve and drain line.

Existing unit does not have an upstream wye strainer.

Test RP. Repair or replace unit, as necessary.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is repaired or replaced, install an upstream wye strainer.

3205 Desert Dover Chapel CES Utilities 3205-2 1st Floor, Mechanical Room, SE Corner of Building

Irrigation High 3 Isolation DC 3 2 2 Irrigation

Existing unit provides insufficient protection for high hazard applications. Existing unit does not have adequate freeze protection.

Existing unit does not have an upstream wye strainer.

Replace existing unit with an approved RP with upstream wye strainer. Install approved freeze protection.

2612 Dorothy H Finley Child Development Center CES Utilities 2612-B 1st Floor, Kitchen Food Grinder High 0.5 Isolation AVB 0.5 2 2 Kitchen Equipment Existing AVB provides insufficient protection for a food grinder.

Replace existing device with an approved, hot water rated RP with an upstream wye strainer.

400 Hospital FSI 400-11 1st Floor, Room 207 Building Supply High 2 Containment RP 2 2 3 Containment

Staining on relief valve indicates past discharges. Insufficent air gap between relief valve and drain line. Existing unit is not lead free. Existing unit does not have an upstream wye strainer.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is replaced, install an approved LFRP with an upstream wye strainer.

400 Hospital FSI 400-10 1st Floor, Room 62 Dental Equipment High 0.75 Isolation RP 0.75 3 3 Dental Equipment Insufficient air gap between relief valve to drain line. Existing unit does not have an upstream wye strainer.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is repaired or replaced, install an upstream wye strainer.

401 355th Medical Group Mechanical Plant FSI 401-1 Basement, Behind

Water Softener Water, Softening System High 2 Isolation RP 2 4 3 Domestic Water

Usage

Insufficient air gap between relief valve and drain line. Existing unit does not have an upstream wye strainer.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is repaired or replaced, install an upstream wye strainer.

4844 C-130 Maintenances CES Utilities 4844-3 Base of FSS Tank 4844-1

Fire Suppression System Tank High 3 Isolation LFRP 3 2 3 Fire Suppression

System Tank Existing unit does not have adequate freeze protection. Install approved freeze protection.

4844 C-130 Maintenances CES Utilities 4844-4 Base of FSS Tank 4844-2

Fire Suppression System Tank High 3 Isolation LFRP 3 2 3 Fire Suppression

System Tank Existing unit does not have adequate freeze protection. Install approved freeze protection.

1540 355th Communications Squadron CES Utilities 1540-5

1st Floor, Mechanical Room, E Side of Building

Fire Suppression System W/ FDC High 6 Isolation LFDC 6 1 3 Fire Suppression

System W/ FDC Existing unit is missing test cock #1.

Install test cock #1 and test the unit. An approved RP is recommended; however, AFI 32-1067 only requires an approved DC for this cross-connection.

2612 Dorothy H Finley Child Development Center CES Utilities 2612-3

1st Floor, Mechanical Room, E Side of Building

Fire Suppression System W/ FDC High 4 Isolation LFDC 4 5 3 Fire Suppression

System W/ FDC Missing shutoff valve.

Install the missing shutoff valve and test the unit. An approved RP is recommended; however, AFI 32- 1067 only requires an approved DC for this cross-connection.

4820 Base Operations CES Utilities 4820-3 NE Side of Building Fire Suppression System W/ FDC High 4 Isolation DC 4 2 3,7 Fire Suppression

System W/ FDC Existing unit does not have adequate freeze protection.

Install approved freeze protection. An approved RP is recommended; however, AFI 32-1067 only requires an approved DC for this cross-connection.

5607 355th Weapons Maintenance CES Utilities 5607-3 1st Floor, Mechanical

Room Fire Suppression System W/ FDC High 4 Isolation LFDC 4 5 3 Fire Suppression

System W/ FDC Existing unit is missing test cock #1.

Install test cock #1 and test the unit. An approved RP is recommended; however, AFI 32-1067 only requires an approved DC for this cross-connection.

74 General James H Doolittle Center CES Utilities 74-2

Gated Mechanical/HVAC Yard

Swamp Cooler Supply Line High 2 Isolation RP 2 6 3 Heating and Cooling

Systems

Test cock #1 has calcified, which suggests it is damaged. Existing unit does not have adequate freeze protection. Existing unit does not have an upstream wye strainer.

Replace test cock #1 and test the unit. Install approved freeze protection. When existing unit is repaired or replaced, install an upstream wye strainer.

Page D-8 Table D-1. Priority Recommendations and Cost Estimates, Davis-Monthan AFB

URS Group, Inc.

Facility Num. Facility Name CC Owner CC ID CC Location Hazard / Cross- Connection

Degree of Hazard

Pipe Size (in)

Isolation or Containment BP Type BP Size

(in.)

Height

(ft) Priority

Category System Type Deficiency Recommendation

Facility Information Cross-Connection Information BP Information Backflow Recommendation

74 General James H Doolittle Center CES Utilities 74-5

Gated Mechanical/HVAC Yard

Chiller, Make-Up High 1 Isolation RP 1 5 3 Heating and Cooling Systems

Existing unit does not have adequate freeze protection. Existing unit does not have an upstream wye strainer. This unit may be redudant (see CCID: 74-2) with the supply line to the swamp coolers / chiller make-up line and may not be needed.

Recommendation assumes the unit is not necessary.

Determine the hazard the unit is protecting. If the unit is not needed, remove the device. If the unit is necessary, install approved freeze protection. When existing unit is repaired or replaced, install an upstream wye strainer.

401 355th Medical Group Mechanical Plant FSI 401-2 1st Floor, Mechanical

Room, Next to Boiler Boiler, Make-Up High 0.75 Isolation RP 0.75 13 3 Heating and Cooling Systems

Existing unit is installed 13 feet above the ground. The unit is not readily accessible for testing and repair. Existing unit does not have an upstream wye strainer.

Relocate existing unit to an accessible height (1-5 ft) for testing and maintenance. When existing unit is repaired or replaced, install an upstream wye strainer.

401 355th Medical Group Mechanical Plant FSI 401-3

1st Floor, Back Corner Near Backflow Testing Training Area

Chiller, Make-Up High 0.75 Isolation RP 0.75 3 3 Heating and Cooling Systems

Insufficient air gap between relief valve and drain line. Existing unit does not have an upstream wye strainer.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is repaired or replaced, install an upstream wye strainer.

1540 355th Communications Squadron CES Utilities 1540-4 S Side of Building Chiller, Make-Up High 0.5 Isolation RP 0.5 1 3 Heating and Cooling

Systems

Existing unit does not have adequate freeze protection. Existing unit does not have an upstream wye strainer.

Install approved freeze protection. When existing unit is repaired or replaced, install an upstream wye strainer.

3208 Hope Chapel CES Utilities 3208-1 1st Floor, Mechanical Room, N Side of Building

Chiller, Make-Up High 0.75 Isolation RP 0.75 6 3 Heating and Cooling Systems

Existing unit is installed 6 feet above the ground. The unit is not readily accessible for testing and repair. Existing unit does not have an upstream wye strainer.

Relocate unit to an accessible height (1-5 ft) for testing and maintenance. When existing unit is repaired or replaced, install an upstream wye strainer.

4300 CE SABER CES Utilities 4300-1 1st Floor, Mechanical Room

Boiler and Chiller, Make-Up High 0.75 Isolation RP 0.75 5 3 Heating and Cooling

Systems

Existing unit is not rated for hot water applications. Existing unit does not have an upstream wye strainer.

Replace existing unit with an approved, hot water rated RP with an upstream wye strainer.

4809 A-10 Maintenance Dock CES Utilities 4809-1 1st Floor, Mechanical Room, Between Bays 3 and 4

Boiler, Make-Up High 0.75 Isolation RP 0.75 4 3 Heating and Cooling Systems

Existing unit is not rated for hot water applications. Wye strainer is not installed properly. Wye strainer is installed downstream of unit.

Replace existing unit with an approved, hot water rated RP, and move wye strainer so that it is immediately upstream of unit.

4816 Federal Aviation Administration CES Utilities 4816-1 1st Floor, Mechanical

Room Boiler and Chiller, Make-Up High 1 Isolation RP 1 3 3 Heating and Cooling

Systems

Insufficient air gap between relief valve and drain line. Existing unit does not have an upstream wye strainer.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is repaired or replaced, install an upstream wye strainer.

4820 Base Operations CES Utilities 4820-1 2nd Floor, Mechanical Room

Boiler and Chiller, Make-Up High 1 Isolation RP 1 2 3 Heating and Cooling

Systems

Existing unit is not rated for hot water applications. Insufficient air gap between relief valve and drain line. Test cock #1 is damaged. Existing unit does not have an upstream wye strainer.

Replace existing unit with an approved, hot water rated RP with an upstream wye strainer.

4844 C-130 Maintenances CES Utilities 4844-2 1st Floor, Mechanical Room, E Side of Building

Boiler and Chiller, Make-Up High 0.75 Isolation RP 0.75 5 3 Heating and Cooling

Systems

Insufficient air gap between relief valve and drain line. Existing unit does not have an upstream wye strainer.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is repaired or replaced, install an upstream wye strainer.

4844 C-130 Maintenances CES Utilities 4844-5 NE Corner of Building Chiller, Make-Up High 0.5 Isolation LFRP 0.5 2 3 Heating and Cooling Systems

Existing unit does not have adequate freeze protection. Existing unit does not have an upstream wye strainer.

Install approved freeze protection. When existing unit is repaired or replaced, install an upstream wye strainer.

4844 C-130 Maintenances CES Utilities 4844-6 NW Corner of Building Chiller, Make-Up High 0.5 Isolation LFRP 0.5 2 3 Heating and Cooling

Systems

Existing unit does not have adequate freeze protection. Existing unit does not have an upstream wye strainer.

Install approved freeze protection. When existing unit is repaired or replaced, install an upstream wye strainer.

400 Hospital FSI 400-13 S Side of Building Irrigation High 1.5 Isolation RP 1.5 3 3 Irrigation

Water supply to existing unit is shut off.

Existing unit does not have adequate freeze protection. Existing unit does not have an upstream wye strainer.

Install approved freeze protection. When existing unit is repaired or replaced, install an upstream wye strainer. OR If unit is to remain inactive, remove existing unit and cap the lines.

400 Hospital FSI 400-7 W Side of Building, Near Hospital Entrance Irrigation High 3 Isolation RP 3 1 3 Irrigation Hazard associated with this unit has been removed.

Remove unit and cap line. If existing unit is not removed, it must be tested as an active unit and an upstream wye strainer and approved freeze protection must be installed.

Page D-9 Table D-1. Priority Recommendations and Cost Estimates, Davis-Monthan AFB

URS Group, Inc.

Facility Num. Facility Name CC Owner CC ID CC Location Hazard / Cross- Connection

Degree of Hazard

Pipe Size (in)

Isolation or Containment BP Type BP Size

(in.)

Height

(ft) Priority

Category System Type Deficiency Recommendation

Facility Information Cross-Connection Information BP Information Backflow Recommendation

2612 Dorothy H Finley Child Development Center CES Utilities 2612-4 W Side of Building, on

Perimeter Irrigation High 2 Isolation RP 2 1 3 Irrigation Existing unit does not have adequate freeze protection. Existing unit does not have an upstream wye strainer.

Install approved freeze protection. When existing unit is repaired or replaced, install an upstream wye strainer.

400 Hospital FSI 400-12 1st Floor, Room 61A, Back Closet Sterilizer High 2 Isolation RP 2 2 3 Medical Equipment

Insufficient air gap between relief valve and drain line. Existing unit does not have an upstream wye strainer.

Increase air gap on drain line from RP relief valve to meet UPC standards. When existing unit is repaired or replaced, install an upstream wye strainer.

400 Hospital FSI 400-B

1st Floor, Mechanical Room, Room 355, Access Through Dental X-Ray Room

Fire Suppression System W/ FDC High 4 Isolation BFPA_REQ 4 4 4 Fire Suppression

System W/ FDC Unprotected fire suppression system supply line with fire department connections.

An approved RP is recommended; however, AFI 32- 1067 only requires an approved DC for this cross-connection.

Note: Table D-1 is sorted by priority category. Bold lines indicate divisions between priority category groupings. Within each priority category, recommendations are sorted by system type then building number.