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TRANSCRIPT
Long Term 2 Enhanced Surface Water Treatment Rule
& Ground Water Rule Updates for Oklahoma
Water Systems
June 2014
October 1, 2013 • Administra5on of three Drinking Water Rules transferred from EPA to Oklahoma DEQ:
– Stage 2 Disinfectants and Disinfec5on Byproducts Rule (Stage 2 DBP)
– Long Term 2 Enhanced Surface Water Treatment Rule (LT2)
– Ground Water Rule (GWR)
LONG TERM 2 ENHANCED SURFACE WATER TREATMENT RULE
(LT2 RULE)
Long Term 2 Enhanced Surface Water Treatment Rule
• What is the intent of the rule? – Reduce disease associated with Cryptosporidium and other disease causing microorganisms
– Cryptosporidium is a parasite • Its covered by a protec5ve outer shell
– survives outside the body for long periods – protected from disinfectants
• Common in surface water • Causes gastrointes5nal illness
Long Term 2 Enhanced Surface Water Treatment Rule
• To reduce risk you must iden5fy the most at risk surface water sources
• PWS serving <10,000 people – must sample for E. coli once every two weeks for 12 months
– If E. coli threshold is exceeded then sample for Cryptosporidium for 24 months
Long Term 2 Enhanced Surface Water Treatment Rule
• To reduce risk you must iden5fy the most at risk surface water sources
• PWS serving >=10,000 people – must sample for Cryptosporidium, E. coli and turbidity for 24 months
Long Term 2 Enhanced Surface Water Treatment Rule
• PWSs have completed the 1st round of Cryptosporidium monitoring
• New PWSs or PWSs with new surface water sources must conduct Cryptosporidium or E. coli monitoring
Long Term 2 Enhanced Surface Water Treatment Rule
• Five PWSs exceeded Cryptosporidium “ac5on levels” during the first round of monitoring – Four PWSs must meet addi5onal treatment requirements by October 1, 2013
– One PWS must meet addi5onal treatment requirements by October 1, 2014
• New repor5ng requirements for these PWSs on Monthly Opera5ng Reports (MOR)
Long Term 2 Enhanced Surface Water Treatment Rule
• The types of addi5onal treatment u5lized by Oklahoma systems so far: – Mee5ng stricter individual filter effluent turbidity & combined filter effluent turbidity
– Using chlorine dioxide disinfec5on • There is a wide range of treatment and management strategies
Long Term 2 Enhanced Surface Water Treatment Rule
• A few other treatment op5ons: – Membrane filtra5on, ozone, or UV
Long Term 2 Enhanced Surface Water Treatment Rule
• DEQ will work with systems to develop an appropriate sample site plan
• System must select a cer5fied laboratory for sample analysis and sample collec5on techniques – At this point, PWSs will be responsible for the cost of analysis unlike during the first round of monitoring
Long Term 2 Enhanced Surface Water Treatment Rule
• Second round of monitoring start dates: 1) At least 100,000 people April 2015 2) 50,000 to 99,999 people October 2015 3) 10,000 to 49,999 people October 2016 4) Fewer than 10,000 people – E. coli monitoring only October 2017 – Cryptosporidium monitoring April 1, 2019
GROUND WATER RULE (GWR)
Ground Water Rule
• What is the intent of the rule? – Increased protec5on against microbial pathogens in systems using ground water • The majority of waterborne diseass outbreaks occur at small non-‐disinfected ground water systems
– Protects public health by requiring higher-‐risk groundwater systems to monitor and, when necessary, take correc5ve ac5on
Ground Water Rule
• What is the intent of the rule? – Ground Water Rule works in conjunc5on with the Total Coliform Rule
– Both rules u5lize results of E. coli analysis • Total coliform rule focuses on the water quality of the distribu5on system • Ground water rule focuses on the water quality of the ground water sources
Ground Water Rule
• To whom does the rule apply? – Systems relying 100% on ground water – Consecu5ve systems receiving ground water – Systems with mixed surface and ground water
Ground Water Rule
• What does the rule require? – Triggered monitoring of the ground water source(s) for E. coli • When there is a posi5ve rou5ne total coliform rule sample (TCR+)
– Consecu5ve systems must no5fy all wholesale system(s) with wells that provide water to the consecu5ve system
– Consecu5ve systems must also no5fy DEQ
Ground Water Rule
• Consecu5ve System Op5ons for TC+ No5fica5on to DEQ – Send e-‐mail to [email protected]
• ALWAYS put PWSID# and system name in subject line • Keep a copy of your sent email in case it is needed for proof
– Or fax to (405) 702-‐8101 (Apn: Jennifer Alig) • If e-‐mail is not possible
– Or call (405) 702-‐8219 • if e-‐mail and fax are not possible and water system logs all calls
Ground Water Rule
• Differences in EPA/DEQ rule implementa5on – Well samples must s5ll be collected within 24 hours of TCR+: • DEQ requires PWS to sample wells that were in use or could have been in use at the 5me the TCR+ sample was collected • EPA required PWS to sample all wells used in the past 30 days
Ground Water Rule
• Differences in EPA/DEQ rule implementa5on – Well samples must s5ll be collected within 24 hours of TCR+: • Samples must be collected at the raw water taps
– if chlorine is present, the sample will be rejected
• DEQ con5nues to educate cer5fied labs that triggered source samples cannot have chlorine present
Ground Water Rule
• Differences in EPA/DEQ rule implementa5on – Well samples must s5ll be collected within 24 hours of TCR+: • If samples cannot be collected within 24 hours, contact DEQ for guidance – extensions may be granted if DEQ is contacted immediately
• EPA contact no longer required
Ground Water Rule
• Differences in EPA/DEQ rule implementa5on – Enhanced focus on technical assistance
• Call DEQ for immediate assistance with GWR sampling ques5ons • Inform DEQ of TCR+ samples in consecu5ve systems and request DEQ guidance for consecu5ve system no5fica5ons • In the case of E. coli at a well, no5fy DEQ immediately
– DEQ will provide assistance with Boil Advisories, Public No5fica5ons, and any required correc5ve ac5ons
DEQ Contacts
• LT2 Rule: Jordan Canary – [email protected] – (405) 702-‐8165
• Ground Water Rule: Jennifer Alig – [email protected] – (405) 702-‐8219
• Any Rule: PWS Compliance Tracking Sec5on – (405) 702-‐8100
Ques5ons