Oklahoma Department of Environmental Quality Water Quality Division. Patty S. Thompson, P.E. Water Pro Conference September 30, 2015

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1 Oklahoma Department of Environmental Quality Water Quality Division Patty S. Thompson, P.E. Water Pro Conference September 30, 2015

2 In 2010, several things happened in Oklahoma to bring about an interest in developing regulations for water reuse: Drought Oklahoma Water Plan Municipalities

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5 Oklahoma Water Resources Board (OWRB) developed the 2060 Water Plan HB 3055 Water for 2060 Act passed in 2012 Water for 2060 Act sets a 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

6 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 drought that Oklahoma was experiencing These representatives met with the Oklahoma Department of Environmental Quality (DEQ) and a workgroup was formed with members from DEQ, various municipalities, technical experts from engineering firms, and members of the public

7 A review of other states water reuse regulations and implementation methods along with input from our workgroup 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)

8 Wastewater to be reclaimed was divided into five categories (2, 3, 4, 5, & 6) for non-potable use, with each category having specific treatment, reuses, testing frequencies, limits, and monthly reporting requirements. Category 1 was reserved for potable reuse. Direct Potable Reuse to be classified as 1(a). Indirect Potable Reuse to surface waters to be classified as1(b). Indirect Potable Reuse to groundwater to be classified as1(c).

9 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

10 Direct Potable Reuse (DPR) Introduction of advanced treated water, through an engineered buffer, into the raw water supply immediately upstream of a drinking water treatment facility, and treated to meet drinking water standards for potable purposes Indirect Potable Reuse (IPR) Introduction of advanced treated water into an environmental buffer such as a surface water body, before being withdrawn and treated at a drinking water treatment facility to meet drinking water standards for potable purposes

11 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

12 Irrigation Concrete mixing Dust control Industrial cooling towers Toilet and urinal flushing Fire protection Vehicle washing Range cattle watering Hydraulic fracturing

13 Category Treatment Reuses 1 Reserved (for direct and indirect potable reuse) 2 Secondary Treatment (nutrient removal, coagulation, filtration and disinfection) 3 Secondary Treatment (nutrient removal and disinfection) 4 Primary Lagoon Treatment (disinfection and storage detention) 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 6 Wastewater treatment plant use only

14 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 daily 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

15 Log Removal o 5-log removal or inactivation of Adenovirus type 15 o 5-log removal or inactivation of Salmonella typhimurium o 3-log removal or inactivation of Giardia lamblia

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 Oklahoma has approximately 140 existing facilities with the following categories: Category 2 Category 3 Category 4 Category 5 2 facilities in process 10 facilities 10 facilities 125 facilities Operating Permits are renewed every five (5) years.

20 Technology (new processes) Water Quality Standards Oil and Gas

21 Co-Chairmen Tom Crowley, P.E., Carollo Engineers Gary Hunter, P.E., Black and Veatch Regulations promulgated in FY 2014 Traveling Bridge Filters Disc and Cloth Filters Ultraviolet Radiation (UV) Disinfection Systems

22 Regulations promulgated in FY Effective September 15, 2015 Disinfection Technologies Onsite hypochlorite generation Ozonation Filtration technologies Membrane Filters (Micro, Ultra, Nano, and Reverse Osmosis) Oil and Gas Category 3 for hydraulic fracturing Category 2 for makeup water for oil and gas production

23 Membrane Bioreactors (MBR) Peracetic Acid Disinfection (PAA) Advanced Oxidation Processes (AOP) CT for Chlorine for Category 2 Reuse Biologically Active Filtration (BAF) Non-potable water uses onsite of Wastewater Treatment Plant

24 Co-Chairmen Michael Graves, Garver Engineering Ellen McDonald, P.E., Alan Plummer and Associates Priorities FY 2016 Oklahoma Water Resources Board (OWRB) Water Quality Standards ISSUE: The Sensitive Water Supply (SWS) lakes are provided additional protection in the Oklahoma Water Quality Standards, with a prohibition of no new loading or new point source discharges, unless the discharge will result in maintaining or improving the water quality of both the direct receiving water and any downstream waterbodies designated SWS [OAC 785: (c)(4)(B)] Path forward on indirect potable reuse (IPR) for SWS lakes to allow for augmentation by reclaimed water through Water Quality Standard changes A method to change the classification of SWS lakes to SWS-R lakes is being proposed This change to Chapter 45 has to go through the Rulemaking Process

25 Water classified SWS-R are: those waters of the state which constitute sensitive public and private water supplies that may be augmented with reclaimed water for the purpose of indirect potable reuse.

26 OWRB Rulemaking Process October 1, nd Informal Stakeholder Meeting, 1:30 p.m. at the OWRB. October 27, rd Informal Meeting, 1:30 p.m. at the OWRB. November 1, 2015 Notice for formal comment period (assuming public and stakeholder acceptability)

27 December 31, 2015 Comment period closes January 19, OWRB Board Meeting hears staff proposed WQS revisions February or March 2016 Board Meeting to vote on proposed revisions Late Likely effective date

28 Chairman Rick McCurdy, Chesapeake Reclaimed water to be used for hydraulic fracturing and makeup water for drilling DEQ and Oklahoma Corporation Commission have negotiated a Memorandum of Agreement (MOA) on jurisdictional issues for water reuse Oklahoma Corporation Commission is also updating rules

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 Thank you Patty S. Thompson, P.E. Water Quality Division Oklahoma Department of Environmental Quality