&EPA
         United States
         Environmental Protection!
         Agency
                    Ground Water  Rule Compliance Monitoring  Requirements
                    Systems Providing  4-log Treatment of Viruses with Chemical Disinfection
MONITORING REQUIREMENTS
 System Size
                  Monitor What, Where & When
    >3,300
    People
    <3,300
    People
Footnot
              L. Notify your state that you provide 4-log
               treatment of viruses and wish to conduct
               compliance monitoring.
              2.Contact your state to determine the minimum
               disinfectant residual concentration and record
               here:
              3. Monitor disinfectant residual concentration
                continuously at or before the first customer.
              4. Record the lowest disinfectant residual
                concentration each day that water from the
                ground water source is served to the public.
              1. Notify your state that you provide 4-log
               treatment of viruses and wish to conduct
               compliance monitoring.
              2.Contact your state to determine the minimum
               disinfectant residual concentration and record
               here:
3. Monitor disinfectant residual concentration at
  or before the first customer.
4.Take grab samples on a daily basis during peak
  flow (or at another time specified by the state).
5. If you choose to monitor continuously you
  must meet all the monitoring requirements for
  systems serving >3,300 people.
                                            If continuous monitoring
                                            equipment fails:
                                            I.You must conduct grab
                                             sampling every 4 hours
                                             until the continuous
                                             monitoring equipment
                                             is returned to service.
                                            2.You must resume
                                             continuous disinfectant
                                             residual monitoring
                                             within 14 days.
  If any daily grab sample
  is less than the minimum
  disinfectant residual
  concentration:
  I.You must take samples
   every 4 hours until
   the residual meets or
   exceeds the minimum
   disinfectant residual
   concentration.
                            Public Notification
                         1. Failure to monitor is a
                           monitoring violation
                           and you must notify
                           the public with a Tier 3
                           Public Notice (PIM).1
                         2. Failure to meet the
                           minimum disinfectant
                           residual concentration for
                           more than 4 hours (i.e.,
                           2 samples 4 hours apart)
                           is a treatment technique
                           violation and you must
                           notify the public with a
                           Tier 2 PIM.2
1. Failure to monitor is a
  monitoring violation
  and you must notify the
  public with a Tier 3 PN.1
2. Failure to meet the
  minimum disinfectant
  residual concentration for
  more than 4 hours (i.e.,
  2 samples 4 hours apart)
  is a treatment technique
  violation and you must
  notify the public with a
  Tier 2 PIM.2
                            CORRECTIVE ACTION

                            If the state identifies a significant deficiency
                            your system, take corrective action.
• A significant deficiency may be identified
  during a sanitary survey or at any other time.
• You are required to provide the state with
  information requested to complete a sanitary
  survey.
Within 30 days of notification:
• You must consult with your state to
  determine a corrective action unless the
  state specifies a corrective action.
Within 120 days of notification:
• You must complete corrective action; or,
• You must be in compliance with state-
  approved corrective action plan and
  schedule.
If you fail to take corrective action, you will
incur a treatment technique violation and must
notify the public with a Tier 2 PN.3
• Community water systems: If you have not
  corrected the significant deficiency before
  the end of the calendar year, you must notify
  the public with a Special Notice in your next
  CCR and repeat annually until the significant
  deficiency has been addressed.
• Noncommunity water systems: If you have
  not corrected the significant deficiency within
  12  months, you must notify the public with a
  Special Notice and repeat annually until the
  significant deficiency has been addressed.
       tion you must notify the state within 48
hours of the violation and provide a Tier 3 PN to the public within 1 year (potentially in CCR).
Footnote 2: For this violation you must notify the state as soon as possible but no later than the end of the next business day of the violation and provide a Tier 2 PN to the
           public within 30 days.

Footnote 3: For this violation you must notify the state within 48 hours of the violation and provide a Tier 2 PN to the public within 30 days.

The term "state" is used to refer to all types of primacy agencies including states, U.S. territories, Indian tribes, and EPA.
If your system decides to discontinue 4-log treatment of viruses, you must get state approval and meet triggered source water monitoring requirements. These requirements
are covered in a separate placard.
State/Primacy Agency Contact (name and phone number):.
                                                              Office of Water (4606M)  EPA 816-F-10-060   www.epa.gov/safewater  April 2010

-------