STATE OF WASHINGTON
DEPARTMENT OF HEALTH
NORTHWEST DRINKING WATER REGIONAL OPERATIONS
20425 72nd Avenue South, Suite 310, Kent Washington 98032-2388
June 18, 2013

ROBERT YORK
PORT OF SEATTLE/SEATAC AIRPORT
PO BOX 68727
SEATTLE WA 98168-0727

Subject:       Port of Seattle/SeaTac Airport Water System (ID# 03182D)
King County
2013 Routine Sanitary Survey
Dear Mr. York:
This letter is in follow up to my inspection of the Port ofSeattle/SeaTac water system on June 13,
2013. My inspection was part of the Department's routine sanitary survey program. The purpose of
this program is to inspect water system facilities and their O & M programs to ensure compliance
with drinking water regulations and to help ensure that safe and reliable water is delivered to users.
appreciate the time spent by you, Paul Price, Cody Smullin, Tom Banomi, and Michael Smith
discussing operational practices and showing me the water system. The SeaTac Water System
appears to be very well operated and maintained, keep up the good work.
A copy ofmy inspection summary is enclosed, please check it for accuracy. All ofthe items listed in
the recommendation/directives section ofthe summary should be addressed by the water system.
The Drinking Water Regulations require that all Group A public water systems have a sanitary
survey every 5 years. In order to receive credit for the survey, a sanitary survey fee must be paid.
Enclosed is an invoice for $1020. Please remit your complete payment in the form of a check or
money order within thirty days of the date of this letter to: DOH, Revenue Section, P.O. Box 1099,
Olympia, WA 98507-1099.
Once again thank you for your time, ifyou have any questions please call me in Kent at (253) 395-
6767.
Sincerely,
(!-for
Steve Deem, PE
Regional Engineer
NW Drinking Water Operations
Enclosures
Cc:    King County Health
Paige Igoe, DOH
0

STATE OF WASHINGTON
DEPARTMENT OF HEALTH
NORTHWEST DRINKING WATER REGIONAL OPERATIONS
20425 72nd Avenue South, Suite 310, Kent Washington 98032-2388

MEETING SUMMARY/SYSTEM INSPECTION
June 13, 2013

System:                   Port of Seattle/SeaTac Water System
King County
ID# 03182D

Persons Attending:         Bob York, System Manager
Paul Price, Chief Maintenance Engineer
Cody Smullin, Operating Engineer 2
Tom Banomi, Operating Engineer 2
Michael Smith, Manager Mechanical Systems
Steve Deem, DOH

Purpose:                  Routine Sanitary Survey

System Summary & Findings:

General:

SeaTac water system waslast surveyed in August 2008.  Findings from the survey
included recommendations to document written standard operating procedures (SOPs).
Since the last survey the water system has expanded to serve the new SeaTac rental car
facility.

System Description:

The SeaTac water system provides waterto the airport terminal and all ofthe support
facilities at SeaTac International Airport.  Approximately 35 million passengers use the
airport each year. The 2008 Water System Plan indicates approximately 18,000 employees
work at SeaTac. Total flights including major area air carriers, small commercial and other
flights exceed 350,000 flights per year. Average day demands are approximately 750,000
gallons per day.  Fire flow requirements for the Northwest Service Hanger (18,300 gpm for
1 hour) drives distribution sizing. The fuel farm storage facility has a fire flow
requirement of 5,000 gpm for 4 hours. The system is classified as a Group A non-transient
non community (NTNC) water system. The water system has a green operating permit.
The Port of Seattle owns and operates the SeaTac Water System.

The water system is surrounded by the Highline Water District to the south and east; Water
District 49 on the west, and Water District 125 on the north.

o>

Port of Seattle/SeaTac
June 13, 2013
Page 2

The SeaTac water system provides service to approximately 80 metered and non-metered
service connections throughoutthe airport area. The port meters water supplied to its
tenants but does not meter internal airport operations.  SeaTac purchases all of its water
from the City of Seattle.  SeaTac receives its water from the Cedar River pipeline #4 which
is a 60-inch main. The Seattle main connects to two parallel 24-inch diameter pipelines.
Each 24-inch main is metered with a 20-inch meter. A separate 12-inch main is teed off
the 24 inch mains and metered with a 10-inch meter for domestic flows. The two large
meters are required for fire flows.

The SeaTac water system consists of a booster pump station located adjacent to Air Cargo
Road, a two million gallon steel storage tank, and a looped distribution system including
24-inch water mains on Cargo Road and the main runway, and a new 24-inch main loop
for the 3" runway. The pumpstation has 14 pumps. Two pumps supply water from SPU
service to the reservoir, two pumps provide domestic service and 10 pumps provide fire
flows. One of two 2,100-gpm pumps draws water from the Seattle supply and into the
2MG tank. Two variable speed pumps maximum 2,500 gpm capacity provide all domestic
demands. Operating pressures range from 45 psi in the north service area to approximately
90 psi in the southern extreme. The two 24-inch SPU mains are connected directly to the
pump station and serve as suction headers for the fire flow pumps. The fire flow pumps
are a mix of 2 electric and 8 diesel motors.

SeaTac also owns two wells located on the south end of the Airport. Well #1 is used by
the Tyee golf course for irrigation. A second well (Des Moines Creek mitigation well) is
operated by the Port as mitigation for the 3" runway project. Additional groundwater
withdrawals may be available under the Port's groundwater right permit.

Water Quality Monitoring:

Coliform Monitoring:

SeaTac is part of the Seattle regional monitoring system and is required to collect 25
coliform samples per month. SeaTac collects 28 samples a month from 7 routine sampling
sites. The routine sampling sites are all dedicated; constant flow sampling taps similar to
the type used by SPU.  SeaTac collects a sample from each of the 7 sites weekly (7 x 4
weeks = 28 samples per month). Operators measure chlorine residual and temperature
whenever any coliform sample is collected. All samples are also analyzed for HPC. The
SPU water quality lab conducts all lab work. The system is in compliance with coliform
monitoring.

In addition to the routine coliform sampling required by DOH, SeaTac conducts additional
water quality monitoring for the jet way water boxes. Jet way water boxes are the
apparatus that are used to provide water to commercial jet airliners. All jet way water box
services are monitored 6 times a year. Jet way water sites are tested for chlorine residual,
temperature, coliform, and HPC. Records are on file. Operators report that typical HPC
levels are 0 for both routine and jet way sample sites.

Port of Seattle/SeaTac
June 13, 2013
Page 3

Source Monitoring:

The water system has no source monitoring requirements since all water is purchased from
SPU.

DBP Monitoring:

Water system collects Disinfection by Product samples. DBP's have been historically very
low consistent with other wholesale customers receiving Cedar River water from SPU.

Pb/Cu Monitoring:

SeaTac conducts distribution lead and copper monitoring and has recently been included in
the Seattle Regional Monitoring Plan. Historic lead and copper samples have been below
the action level.

Facility Approval Status:

The water system obtained approvalfor its July 2008 water system plan.  Plan was
approved in July 2009, water system is considered approved and operates with a green
operating permit.  Water main extension to serve the rental car return facility was approved
and constructed.

Operations and Maintenance:

Port of Seattle operates and maintains a complex mix of facilities that are needed to
support an international airport. The water system is under the jurisdiction of the Aviation
Facilities and Infrastructure department.  System has written SOP's, descriptions of water
system operations, etc.  Staff are aware of key water quality concerns surrounding cross-
connection control, new service installations, routine and preventative maintenance, etc.
Facilities appear to be very well maintained.

Cross Connection Control Program:

System has over 500 backflow prevention devices. System uses a Maximo system for
scheduling services and a separate data base for its cross connection control devices. The
programs do notinterface automatically and must be manually updated. The water system
uses only reduced pressure backflow devices (RPs) for all connections that require
backflow protection.

Coliform Monitoring Plan:

System has a written coliform monitoring plan (CMP). System has 7 routine sites that are
sampled each weekly. System also conducts weekly routine sampling ofjet way water
boxes (provide service to commercial airliners) using a prescribed sampling plan. Five jet
way water box samples are collected weekly.

Port of Seattle/SeaTac
June 13, 2013
Page 4

Recommendations/Directives made to Bob York and Staff:

1.   Please submit a copy of the construction completion report for the car rental facility
submittal #08-0908. (Submitted June 13, 2013)

Please submit a schematic for the system's coliform monitoring plan. (Submitted June
17,2013)

Water System staff monitor the jet way water boxes for water quality parameters, and
conduct documented water flushing operations to insure that the jet way water box
provides potable waterto airliners. Testing results show that potable wateris provided
from these service locations when these standard protocols are followed. Water staff
should develop a standard operating procedure (SOP) (one page) to insure that your
airline customers follow the same practices used by yourstaff when they use the jet
water boxes to service their planes. Key steps for this SOP might include flushing the
jet way water box for 2-3 minutes, measuring chlorine residual and all of the hygiene
practices employed to make sure that the hose does not get contaminated.

All service connections to the SeaTac water system that are not performed directly by
water system staff should be directly supervised / observed by water system staff to
protect the integrity of the water system. Many utilities use standard forms to
documentthat service connections were performed to the utility's standards.

Storage tanks should be protected against unauthorized access. The storage tank hatch
should have an intrusion alarm to notify operators anytime the hatch is opened.

Storage tank facilities including the top of the tank should be inspected on a routine
basis. Key elements of concern are the integrity of air vent screens, overflow structures
and hatch integrity.

Water systems throughout the Puget Sound region continue to plan for emergency
operations including possible scenarios resulting from a large earthquake.  SeaTac
emergency planning should include how water service to the airport would continue if
Seattle's service is interrupted or destroyed. During the survey we discussed the
following areas:

a.   SeaTac should actively create and maintain direct relationships with SPU
management and operational staff. These pre-existing relationships are critical
in an emergency setting.
b.   Since fire flow is such a critical elementfor the water system, seismic valves in
the storage tank that would be activated in an earthquake could help ensure that
sufficient wateris retained even if main waterlines break.

Port of Seattle/SeaTac
June 13, 2013
Page 5

c.   In addition, SeaTac should consider conducting a detailed evaluation of the
pros and cons associated with developing its existing well(s) as an emergency
supply option in the event of loss of service from Seattle. As we discussed,
Department of Health should be contacted and included at the beginning of any
evaluation of the well for emergency supply.

DOH Follow up:

1.       Complete summary, photos were taken.
2.       Send follow up letter.

Port of Seattle/SeaTac
June 18, 2013
Page 6





















Close-up of water box RP device; Routine coliform sample station.