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STATE OF WASHINGTON
DEPARTMENT OF HEALTH
SOUTHWEST DRINKING WATER OPERATIONS
2411 Pacific Ave. • P.O. Box 47823 • Olympia, Washington 98504-7823
(360)664-0768 • FAX(360)664-8058
TDD Relay Service: 1-800-833-6388
June 3, 1999
Attn Commissioner Paul Jensen
Mason County Fire Protection Dist 3
PO Box 129
Grapeview WA 98546
Subject: Mason County Fire Protection Dist 3 Water System, ID #071055,
Mason County, Monitoring Requirements for a New Group A TNC
Dear Commissioner Jensen:
Your water system has been classified as a Group A Transient Non-Community
(TNC) system based on information recently provided to our department. A Group
A TNC system is one which serves either: 1) 15 or more connections less than
180 days per year; 2) 25 or more different non-residents for 60 or more days per
year; 3) 25 or more of the same non-residents for between 60 and 180 days per
year; or 4) 25 or more residents for between 60 and 180 days per year. The above
ID number is unique to your system. Please refer to it in all correspondence and/or
phone messages.
Group A TNC systems are required to conduct comprehensive monitoring. The
following is a summary of water quality monitoring requirements for Group A TNC
systems:
1) Coliform Bacteria -
All Group A water systems serving a population of less than 1000 people are
required to submit one routine water sample per month to test bacteriological
water quality.
During months when the total population served is less than twenty-five,
routine sample collection is not required when: 1) only protected ground
water sources are used, and 2) no coliform were detected in samples during
the previous month. If conditions one and two are met and when the
population is less than twenty-five, sampling is only required quarterly. For
example, after two months without sampling, a system must take one
sample the third month.
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Mason County Fire Protection Dist 3
June 3, 1999
Page 3 of 3
We understand that the regulations are sometimes confusing. If you have
questions, feel free to contact any of the following individuals at the Southwest
• Regional Office:
• Sandy Brentlinger Coliform monitoring (360) 753-5090
Chlorine residual monitoring
• Main Desk Surface Water Treatment (360) 664-0768
Rule
• Judy Passey Water Facility Inventory (360) 664-9280
(WFI) form
• Belle Fuchs Inorganic (IOC) monitoring (360) 586-5179
Besides new water quality monitoring responsibilities, there are additional components
to the drinking water program, which include engineering and operating permits. All
Group A public water systems are required to submit documentation for an approval.
Your file will be reviewed to determine if the system has an approval. Also, within the
next year you will receive an application for an operating permit and the permit itself.
If you would like to speak with the regional engineer for your county, please call the
main desk at (360) 664-0768 to be referred to the correct person. I also have
enclosed a copy of the Washington State Board of Health Drinking Water
Regulations that includes the Code of Federal Regulations (CFR) to assist you.
Sincerely,
udith E. Passey
Enclosures
cc: Laura Benefield, Mason County Health Department
Sandy Brentlinger, DOH Water Quality
John Ryding, P.E., DOH
Sean Orr, DOH Planner
Vinnie Wright, Sanitary Surveys