Oklahoma Department of Environmental Quality Water Quality Division. Patty S. Thompson, P.E. Southwest AWWA Conference October 14, 2014
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1 Oklahoma Department of Environmental Quality Water Quality Division Patty S. Thompson, P.E. Southwest AWWA Conference October 14, 2014
2 In 2010, representatives from a number of Oklahoma municipalities, through the Oklahoma Municipal League, expressed interest in using reclaimed water as a way to help conserve water due to the extreme droughts that Oklahoma has been experiencing. These representatives met with the Oklahoma Department of Environmental Quality (DEQ) and a working group was formed with members from DEQ, various municipalities, technical experts from engineering firms, and members of the public.
3
4 Oklahoma Water Resources Board (OWRB). HB 3055 Water for 2060 Act. Water for 2060 Act sets statewide goal of consuming no more fresh water in 2060 than we consume today. Water efficiency, conservation, recycling, and reuse will need to be implemented to meet that goal.
5 A review of other states water reuse regulations and implementation methods along with input from our working group and technical experts helped DEQ create water reuse regulations that fit the State of Oklahoma. Water reuse regulations became effective July 1, 2012 and can be found online at OAC 252: Wastewater Reuse (Construction Standards) Also updated for Engineer s Reports for Water Reuse OAC 252:627 Water Reuse (Operations Standards)
6 "Water reuse system" means a treatment and distribution system designed to treat and supply reclaimed water. "Reclaimed water" means wastewater that has gone through various treatment processes to meet specific water quality criteria with the intent of being used in a beneficial manner. (OAC 252: ) Supplier means a person or entity that treats and provides reclaimed water pursuant to a permit issued by DEQ. User means a person or entity that uses reclaimed water. In those instances in which the supplier and the user are the same entity, the entity is a supplier subject to the provisions of OAC 252:627 Water Reuse.
7 Wastewater to be reclaimed and reused was divided into four categories (2, 3, 4, & 5) with Category 1 reserved when water reuse regulations were first written. Each category has specific treatment, reuses, testing frequencies, limits, and monthly reporting requirements. The DEQ and its Water Reuse Technical and Water Quality Committees are working on strategies for Indirect Potable Reuse and Direct Potable Reuse for the future. Indirect Potable Reuse would be classified as a Category 1(a) for surface, Category 1(b) for groundwater, and Direct Potable Reuse would be classified as Category 1(c).
8 Categories of water reuse were determined by several factors, including: Final usage of the reclaimed water Potential for human contact Technology required to protect the environment and public health Technology currently available at the wastewater treatment facility
9 Unplanned Indirect Potable Reuse Planned Indirect Potable Reuse Direct Potable Reuse
10 City A Wastewater Facility City B Water Treatment Facility Surface Water or Groundwater
11 Environmental Buffer Water Treatment Facility Advanced Wastewater Facility Surface Water or Groundwater
12 Water Treatment Facility Advanced Wastewater Facility Surface Water or Groundwater
13 Irrigation Concrete mixing Dust control Industrial cooling towers Toilet and urinal flushing Fire protection Vehicle washing Range cattle watering
14 Category Treatment Reuses 1 Reserved (for potable reuse) 2 Secondary Treatment, nutrient removal, coagulation, filtration & disinfection 3 Secondary Treatment plus disinfection 4 Primary Lagoon Treatment and Lagoon Storage plus disinfection 5 Primary Lagoon Treatment and Lagoon Storage Drip irrigation on orchards & vineyards; spray or drip on sod farms, public landscapes, golf courses, and toilets, fire protection, vehicle washing, and range cattle watering. Subsurface irrigation of orchards or vineyards; restricted access landscapes; livestock pasture, concrete mixing, dust control, restricted golf course irrigation. Soil compaction, similar construction activities, and restricted access golf course irrigation. Restricted access pasture irrigation for range cattle, fiber, seed, forage, silviculture.
15 Testing Frequency Limits Turbidity continuous Not to exceed daily average 2 NTU 5 NTU>5% of daily max per month 10 NTU Chlorine at POE continuous free chlorine 1.0 mg/l Chlorine at EOP weekly free chlorine 0.2 mg/l or combined chlorine 0.50 mg/l Fecal Coliform daily No detectable organisms in 4 of last 7 daily samples Single sample max 23 cfu/100 ml Nitrogen/Phosphorus monthly most stringent agronomic rate CBOD5 weekly < 5.0 mg/l
16 Testing Frequency Limits Chlorine at POE 12 hours free chlorine 0.2 mg/l or combined chlorine 0.50 mg/l Fecal Coliform 3/week Monthly geometric mean of < 200 cfu/100 ml Single sample < 400 cfu/100 ml Nitrogen/Phosphorus monthly most stringent agronomic rate CBOD5 weekly < 20 mg/l
17 Testing Frequency Limits Chlorine at POE daily free chlorine 0.20 mg/l or combined chlorine 0.50 mg/l Fecal Coliform weekly Monthly geometric mean of < 200 cfu/100 ml Single sample < 800 cfu/100 ml Dissolved oxygen weekly > 2.0 mg/l
18 Testing Frequency Limits none none none Category 5 is required to maintain MORs (DEQ Form No MOR) on-site, reporting temperature, rainfall, start time, stop time, gallons reused, and site area in acres.
19 This rule requires a Permit to Supply A facility with an existing Land Application Permit will be required to apply for a Permit to Supply. This rule will effect approximately 140 existing facilities with the following categories: Category 3 less than 10 facilities Category 4 less than 10 facilities Category facilities To put this on a five year cycle and to avoid issuing permits all at once, the DEQ will be sending letters to only 20% of existing permittees each year to apply for this permit. The Land Application Permit will serve as the Permit to Supply until you get a letter asking you to apply. An Industrial user from a Municipal discharging facility will be renewed with the OPDES Permit Permits will then be renewed every five (5) years.
20 Construction Forms Discharge Forms Fee Schedule Application Form 583-B Water Reuse Engineering Report Form 627-WRER Land Application Plan of Operation Form 627-LAP 2M1 2M2 If any concerns or ideas, contact Wendy Sheets Water Quality Division (405)
21 Technology Water Quality Standards Oil and Gas (April 2014)
22 Construction Standards promulgated for FY 2014 became effective September 12, 2014: Traveling Bridge Filters Disc and Cloth Filters Ultraviolet Radiation (UV) Disinfection Systems
23 Co-Chairmen Tom Crowley, P.E., Carollo and Gary Hunter, P.E., Black and Veatch Priorities FY 2015: Disinfection Technologies: Onsite hypochlorite generation Ozonation Filtration Technologies Membrane Filters (Ultra, Micro, Nano, and Reverse Osmosis) Wash down of Wastewater Treatment Plant Equipment with Reclaimed Water
24 Wastewater Screening Primary Clarifiers Aeration Basins Wastewater Treatment Final Clarifiers Filters Discharge H 2 O 2 UV Radiation Reverse Osmosis Membrane Filtration Engineered Buffer Advanced Wastewater Treatment IPR DPR Environmental Buffer Water Treatment Plant Distribution Big Springs, Texas CDM Smith
25 Membrane Bioreactors Peracetic Acid Disinfection (PAA) Advanced Oxidation Processes (AOP) CT for Chlorine for Category 2 Reuse
26 Chairman Michael Graves, Garver Engineering Meeting with DEQ and OWRB (Oklahoma Water Resources Board) Working on a White Paper for path forward on indirect potable reuse for Sensitive Water Supply (SWS) designated lake discharges and direct potable reuse To discharge to a SWS it must be demonstrated to the satisfactory of the permitting authority that a new point source discharge or increased load from an existing point source discharge will result in maintaining or improving the water quality of both the direct receiving water and any downstream water bodies designated SWS. [OAC 785: c(4)B]
27 Co-Chairmen: Rick McCurdy, Chesapeake and Stewart Fairburn, City of Chickasha DEQ and Oklahoma Corporation Commission are negotiating a Memorandum of Agreement (MOA) on jurisdictional issues. Water reuse for hydraulic fracturing to be added as a Category 3 use Oil and Gas Production Make-up Water to be added as a Category 2 use
28 Industrial wastewater characteristics are diverse so water reuse permits have been evaluated and issued on a case by case basis Examples: Eagle Rock White Hawk golf course uses Kimberly-Clark s effluent Many quarries and concrete batch plants use their wastewater for dust suppression Hiland Dairy near Chandler land applies their treated wastewater producing Bermuda grass hay thus eliminating a high strength waste discharge to the city
29 All reclaimed water piping, valves, outlets and appurtenances in distribution systems shall be colored purple (Pantone 522). Existing systems will not be required to put in purple pipe, but will need to mark pipe with appropriate signage.
30 Learning and innovation go hand in hand. The arrogance of success is to think that what you did yesterday will be sufficient for tomorrow. - William Pollard
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