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Bacteria Rulemaking

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					  Bacteria
 Rulemaking
Inclusion of Bacteria Limits
     in TPDES Permits
EPA Objections
    EPA review
    303d list for bacteria
    February 2007 –July 2008
       Approximately 100 draft
        permits not approved
    EPA Interim Agreement
   303d list
   Bacteria TMDL
   Over 5 MGD
   >100 cfu/100 ml
   New & amended permits
   Oyster water
   Effluent limits
    EPA Long Term Agreement
   Propose rule by July 1, 2009

   Adopt rule by Dec 31, 2009

   Requires limits upon permit issuance

   Objections to any permit without bacteria
    limits after Jan 1, 2010
Rule Timeline
      Proposal – May 20, 2009
      Comment Period
          Jun 5 – Jul 5, 2009
      Adoption – Oct 28, 2009
      Effective – Nov 19, 2009
Implementation
   Next permit action
       New
       Renewal
       Amendment
   EPA agreement allows no
    compliance schedule
   Recommend starting
    evaluations now
    Bacteria Permit Limits
   Notification language in all permits
   E. coli for fresh water
   Enterococcus for salt water
   Limits effective at issuance
       No compliance schedule
       Possible exceptions for small facilities
        E. coli Permit Limits
   Fresh Water
   Numerical limit in rule
            OR
   Refer to WQ Standards
   WQ Standards changing
       126 cfu current
       206 cfu proposed
Enterococcus Permit Limits

   Salt water discharges
   WQ Standards not changing
       Numeric limit = 35 cfu
Large Domestic Facilities
                Interim Sampling
                     Schedule

                >50 MGD – 5/week
                20-50 MGD – 3/week
                5-20 MGD – 1/week
                <5 –no monitoring
    Monitoring Frequencies
   Based on permitted flow
   Ultraviolet vs chlorine
   Increased frequency:
       application screening
       303d segment
       sensitive water body
             Continued Need for
              Chlorine Testing
   Retain
       4.0 mg maximum
       0.1 mg dechlor
   Regular check
    between bacteria
    samples
   Delay in bacteria
    results
Chlorine Contact Chambers

  Recommend    evaluating now
  If undersized or short-circuiting
    Violating current regulations
    No compliance schedule
    Sample Holding Times

   Standard Methods 9221 & 9222
   Holding time – 6 hours
   Travel time issues
   SWQM in-stream variance
       Laboratory Issues
   In-house testing
    without certification
   Contract lab must be
    NELAC certified
   Proximity to plant
   Increased workload
Pond Systems
   21-day retention time
   Recommend evaluating
       Capacities
       Sample Locations
       Wildlife impacts (birds, etc)
   Compliance schedule for new construction
Wet Weather Issues
    Affects a limited number of facilities
    Blending
    Other options for stand-alone
     facilities that can’t meet limits
Industrial Facilities
             Bacteria limits for
              domestic outfalls
             Commingled domestic
              and process outfalls
             Internal outfalls vs
              external outfalls
             Monitoring frequency
Discussion Topics
 Questions


 Suggestions


 Solutions
Contact Us
   Kent Trede
       ktrede@tceq.state.tx.us
       512.239.1747
   Sherry Smith
       shesmith@tceq.state.tx.us
       512.239.0571
   Chris Linendoll
       clinendo@tceq.state.tx.us
       512.239.4515
Fecal vs Residual Chlorine
                                                  Minor municipal facilities
                                                         (114 data points)

                                    4
Fecal coliform (log of #/100 ml)




                                   3.5
                                    3
                                                                                  Fecal Coliform
                                   2.5
                                                                                  (log)
                                    2
                                   1.5                                            Single sample
                                                                                  maximum log
                                    1                                             (2.6)
                                   0.5                                            Geometric
                                                                                  mean log (2.3)
                                    0
                                         0    5        10          15        20
                                             residual chlorine (mg/L)
                        E. coli vs Residual Chlorine
                                               Minor municipal facilities
                                                          (114 data points)

                              5
                            4.5
E. coli (log of #/100 ml)




                              4
                            3.5                                                    E. coli log
                              3
                            2.5
                                                                                   Single sample
                              2
                                                                                   maximum log (2.6)
                            1.5
                              1                                                    Geometric mean log
                            0.5                                                    (2.1)
                              0
                                  0   5             10            15          20
                                          residual chlorine (mg/L)
Possible Limit Scenarios
   EPA national criteria = WQ Stds contact criterion

   A % of EPA/WQS criteria -- safety factor

   Primary contact criteria from WQS at permit
    issuance

   Individual receiving stream criterion
          Current WQ Stds

   Freshwater
   E. coli
   126 cfu/100 mls
                         Saltwater
                         Enterococci
                         35 cfu/100 mls
Proposed WQ Standards
   Freshwater
   E. coli
   206 cfu/100 ml

   Saltwater
   Enterococci
   35 cfu/100 ml
    Daily Maximum Limit
   Current Standard       Proposed Standard
   E coli                 E coli
      394 cfu/100 ml         399 cfu/100 ml
   Enterococci:           Enterococci
      89 cfu/100 ml          104 cfu/100 ml
Alternate Daily Max Method
          Daily max =
          Daily avg x (3.11/1.47) =
          Daily avg x 2.12
            SIP established ratio (pg 57)
Thanks for coming!

				
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