Attachment 20 - 668-16-110_Cross-Connection Inventory Report .pdf

12720 E. Nora Avenue, Suite A Spokane Valley, Washington 99216 Ph. (509) 921-0290 Fax (509) 921.1788 cascade-earth.com

Cross-Connection Inventory Report Mann-Grandstaff Veteran Affairs Medical Center

Spokane, Washington

September 2019

Disclaimer: The contents of this document are confidential to the intended recipient at the location to which it is addressed. The contents may not be changed, edited, and/or deleted. The information contained in this document is only valid on the date indicated on the original project file report retained by CES. By accepting this document, you understand that neither CES nor its parent company, Valmont Industries, Inc. (Valmont) accepts any responsibility for liability resulting from unauthorized changes, edits, and/or deletions to the information in this document.

Cross-Connection Inventory Report Mann-Grandstaff Veteran Affairs Medical Center Spokane, Washington

Prepared For: Mr. William Wilson, AIA William Wilson Architects, PC 1022 SW Salmon Street, Suite 350 Portland, OR 97205

Prepared By: Cascade Earth Sciences 12720 E. Nora Avenue, Suite A Spokane Valley, Washington 99216

(509) 921-0290

Author(s): John Roberts, CCS, Field Technician David Sullivan, Staff Scientist

Reviewed By: Greg L. Thurman, P.E., Principal Engineer

Report Date: September 12, 2018

Project Number: 2018230008

Submitted By:

Greg L. Thurman, P.E., Principal Engineer

GLT

Typewritten text Exp.: 07/03/2018

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CONTENTS

EXECUTIVE SUMMARY ........................................................................................................... iv

1.0 INTRODUCTION

2.0 FACILITY SURVEY

3.0 INVENTORY

4.0 CONCLUSIONS

TABLES

Table 1. Surveyed Buildings

Table 2. Building 1 Floor Service Inventory

FIGURE

Figure 1. Campus Main Water Lines

APPENDICES

Appendix A. Mann-Grandstaff VAMC Campus Map

Appendix B1-2. Plumbing Survey Field Notes

Appendix C. Inventory Summary

Appendix D. Cross-Connection Control Field Tracking Sheets

Appendix E. Building 1 Room Service Inventory

Appendix F. Cross-Connection Inventory

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EXECUTIVE SUMMARY

The proposed installation of a water disinfection system requires the Mann-Grandstaff Veteran

Affairs Medical Center to create a separate Water District to comply with Washington Department of Health cross-connection requirements. Cascade Earth Sciences was contracted by William

Wilson Architects, PC to provide services in order to comply with Department of Health and

Environmental Protection Agency requirements associated with cross-connection control deficiencies. This report contains a description of the Mann-Grandstaff Veteran Affairs Medical

Center Campus buildings and provides a baseline inventory of the domestic water plumbing services and existing potential cross-connections.

The facility survey methodology is discussed in Section 2. Locations throughout the domestic water system requiring backflow prevention assemblies or indirect connections to prevent backflow of contaminants are identified. Additional deficiencies such as dead end lines and required check valves are noted.

An inventory of existing cross-connections and domestic plumbing services is discussed in

Section 3. The inventory consists of surveyed connections to the domestic water system including rooms with equipment connections and all associated plumbing service connections. The domestic plumbing system was analyzed and inventoried separate from equipment connections and compared to existing engineering records.

The majority of cross-connection issues in the Mann-Grandstaff Veterans Affairs Medical Center are associated with equipment. Lack of backflow assemblies account for the majority of issues. The primary cross-connection categories are: water main supplies, fire protection systems, janitor closets, equipment, irrigation connections, and hose bibs.

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1.0 INTRODUCTION

The project location is the Mann-Grandstaff Veteran Affairs Medical Center (MGVAMC) campus located at 4815 N Assembly Street, Spokane, Washington (Site) consisting of over 30 separate buildings. Appendix A provides a reference of campus buildings. The proposed installation of a water disinfection system requires MGVAMC to create a separate Water District to comply with

Washington Department of Health (DOH) cross-connection control requirements. Cascade Earth

Sciences (CES) was contracted by William Wilson Architects, PC (WWA) to provide services in order to comply with DOH and Environmental Protection Agency (EPA) requirements associated with cross-connection control deficiencies. This report contains a description of the CES Site assessment and provides an inventory of the domestic water plumbing and potential cross-connections.

2.0 FACILITY SURVEY

CES conducted a visual survey (survey) of the water supply connections within the MGVAMC.

The buildings surveyed are listed in Table 1. The Survey included buildings 1, 2, 3, 12, 14, 25, 26, 27, 30, 37, 40, and 41. Buildings 14A, 16, 38, and 39 had no domestic water service. Portions of buildings 4, 5, 6, 6A, 7, 31, 32, and 33 were not mapped due to the location of domestic plumbing lines in confined spaces. The survey was limited to a walk-through visual inspection of all fittings and connections accessible through access ports and doors. CES identified all sources of backflow, air gaps, or other potential contamination based on these connections. Connections that required physical intrusion of walls, floors, ceilings, confined spaces, or other building structures were outside the scope of this project, and therefore not surveyed.

When required, CES personnel were accompanied by Greg Baggarley or Jeremy Kasprak of the

MGVAMC Facility Maintenance Department. Mr. Baggarley and Mr. Kasprak were relied upon, as needed, to direct CES personnel to equipment locations, drain locations, cross-connections between domestic water and non-potable systems, and fire and domestic water building service entrances.

Site main lines were surveyed, where possible, for comparison to engineering records provided by

MGVAMC. Figure 1 provides the location of current Site main and irrigation lines. Domestic water plumbing was surveyed within each building and compared to the existing plan drawings provided by MGVAMC. Appendix B provides plumbing survey field notes of traced domestic cold, hot, hot recirculation, and drinking water lines throughout the Site. Stack connections were located and plumbing services were traced for each floor and room connection when possible. Each stack service was evaluated for plumbing cross-connections involving the domestic hot, recirculation, and cold water systems.

3.0 INVENTORY

A baseline inventory was created of surveyed connections to the domestic water system including rooms with equipment connections and associated plumbing connections. A summary of all identified cross-connections, organized by building and floor is presented in Appendix C. Tracking sheets were created for individual equipment connection locations and are presented in Appendix D.

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The tracking sheets are identified by building, floor, room number (from posted numbers or design plans), and an associated ID number assigned to each cross-connection.

Example tracking sheet identification code: 1-001-C406-001

Where:

1 = Building

001 = Floor

C406 = Room Number

001 = Cross-Connection ID number

The domestic plumbing system for Building 1 was analyzed separately and an inventory of the domestic plumbing service for each floor and room is presented in Table 2 and Appendix E, respectively. Identified dead end lines are noted for each floor in Table 2.

The primary cross-connection categories identified during the inventory were the water main supplies, fire protection systems, janitor closets, equipment, irrigation connections, and hose bibs.

An inventory of all cross-connections (both hazardous and non-hazardous) is provided in

Appendix F. Appendix F includes identified cross-connections regardless if a backflow prevention assembly was installed. Hazards are noted within Appendix F for individual cross-connections.

4.0 CONCLUSIONS

A baseline inventory was created of surveyed connections to the domestic water system including rooms with equipment connections and all associated plumbing service connections. The domestic plumbing system was analyzed and inventoried separate from equipment connections and compared to existing engineering records. The majority of cross-connection issues at the Site are associated with equipment connections. Lack of backflow assemblies account for the majority of identified issues. Primary cross-connection categories are water main supplies, fire protection systems, janitor closets, equipment, irrigation connections, and hose bibs.

This Cross-Connection Inventory Report is to be used in conjunction with the accompanying CES

Corrective Action Report and Cross-Connection Control Plan to address cross-connection control deficiencies. As cross-connection deficiencies are corrected throughout the Site, this Cross-

Connection Inventory can be used as an ongoing record by MGVAMC staff to track cross-connection corrections.

TABLES

Building # Number of

Floors Building Usage

Cross-Connections

Surveyed 1 Plumbing Survey

1 10 Hospital YES YES

2 1 Boiler / Chilling / Laundry YES YES

3 1 EMS / Garage / Maintenance YES YES

4 1 Fiscal / DSS YES YES

5 1 Engineering YES YES

6 1 Human Resources YES YES

6A 1 Veterans Service YES Hard Ceiling

7 1 Substance Abuse Treatment YES Confined Space

10 1 Mechanical YES YES

12 2 Long Term Care YES YES

14 2 Warehouse YES YES

14A 1 Engineering Storage No Water Service No Water Service

16 1 Warehouse Storage No Water Service No Water Service

25 / 26 / 27 2 Specialty Care YES YES

30 1 Eye Clinic YES YES

31 1 Physical Therapy YES Confined Space

32 1 Not Occupied YES Confined Space

33 1 Dental Clinic YES Confined Space

37 1 Native American Sweat Lodge YES YES

38 1 Electrical Switch Gear No Water Service No Water Service

39 1 Electrical Backup Generators No Water Service No Water Service

40 3 Out Patient Mental Health YES YES

41 1 Audiology YES YES

Campus 1 Campus Landscaping and Irrigation YES YES

NOTES

Survey performed between May and August 2018 by a CES Cross-Connection Control Specialist.

Abbreviations: EMS = Emergency Medical Services, DSS = Department of Social Services.

1 The buildings not connected to water are noted as "No Water Service".

2 Buildings marked as "Confined Space", "Hard Ceiling", or "No Water Service" were not surveyed for plumbing.

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Basement 1 2 3 4 5 6 7 8 9

1 Hall HC/D HC C HC - - - - - C

2 007 HCR/D - HCR HC HC

2A A007 C

2B * C

3 C002 HCR - -

3A C002 HC(2)R - - - HCR

4 C004 HCR HC H

C

5 C003 HCR - H

CR HCR HCR HCR HCR HCR HC

6 C005 HCR

7 C005 HCR HC - HCR HCR HC HC HC

15 C005 HCR HC -

16 C005 HCR - - HC

HCR HC HC HC

17 C005 HCR HCR HC

22A Stack 22 HCR HCR HCR HCR HCR HC

22 C003A HCR - HCR HCR

22B Stack 22 HCR HCR HCR HC

23 D008A HC HCR

24 C001 HCR - HC HC HCR HCR HCR HC

25 Hall D D D - - - - D D

26 A008 HCR HC - H HCR -

HC HC HC

27 A002 HCR HCR HCR - HCR HCR HCR - HC

28 A007 HCRD HCRD - - - HCR HC H

C

C

29 A003 HCR - C

HCR HCR HC HC HC HCR HCR

30 A004C HCR - CR - HC HC HCR HC HC

31 A004A/ CS HCR HCR

32 B008 HCR HC HC - HCR - HC

33 B008 HC - HC - - - - HC HC

34 B0012 HCR HC - - HCR -

HC -

35 B014 HC HC

36 Hallway *

37 B016 HC

38 End of Hall HCR

38A B018 HC

39 B005E HCR HC -

40 B005F HCR HC D - HCR HC HCR HC

42 B005A HCR - - - HCR - H

43 Hall Corner HCD D

D - - - - - D

44 Hall HCR - H C

HC - - -

45 Hall HCR - C

HC HCR *

HC HCR

46 B0012 HCR HCRD

HCR HC - - C HC - C

47 A007 HCRD - - HCR HC HC HC HC HC

48 A007 HCRD HCRD

HC HCR - HC

49 A007 HCR - HCR

NOTES:

Abbreviations: - = indicates no stack service, * = indicates service was unable to be assessed, C = domestic cold water, D = domestic drinking water line, H = domestic hot water, R = domestic hot water return line.

1 The Hot water line from Stacks 4 and 5 are connected.

2 Water lines pass through the 2nd Floor in Stack 15 with no service. The 2nd Floor service is provided from room C109 on 1st Floor.

3 Two cold Lines come out of Stack 16.

4 Stacks 22A and 22B originate from Stack 22. The connection occurs on the 3rd Floor.

5 Dead end lines.

6 Drinking water line from Stack 43 runs through Stack 40 up to the 2nd Floor.

7 If a stack connection exists, it is likely tied to the line originating from Stack 28.

8 All lines in Stacks 46 and 48 are connected.

FloorBeginning

Location Stack #

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FIGURE

Figure 1. Campus Main Water Lines

CASCADE EARTH SCIENCES

APPENDICES

Appendix A. Mann-Grandstaff VAMC Campus Map

Appendix B1-2. Plumbing Survey Field Notes

Appendix C. Inventory Summary

Appendix D. Cross-Connection Control Field Tracking Sheets

Appendix E. Building 1 Room Service Inventory

Appendix F. Cross-Connection Inventory

FIGURE