Proposal: c annabis c ultivation Proposal: onsite syste ms Se pte - - PowerPoint PPT Presentation
Re g ula tio n 84 Re c la ime d Wa te r Sta ke ho lde r Me e ting Proposal: c annabis c ultivation Proposal: onsite syste ms Se pte mbe r 26, 2017 Wo rksho p wo rkb o o k is a va ila b le he re fo r do wnlo a d: http:/ / c o lo wq fo rum.o
Se pte mbe r 26, 2017
Wo rksho p wo rkb o o k is a va ila b le he re fo r do wnlo a d: http:/ / c o lo wq fo rum.o rg / wo rkg ro up-re c la ime d-wa te r.html
Brandi Honeycutt Environmental Protection S pecialist Permits S ection Water Quality Control Division CDPHE Trisha Oeth Administrator Water Quality Control Commission CDPHE
Lisa Beutler Executive Facilitator S tantec
Pro vide sta ke ho lde rs a n o ve rvie w o f the pro po se d c ha ng e s to Re g ula tio n 84 a nd re g ula to ry pro c e ss Re c e ive input fro m pa rtic ipa nts o n b e ne fits, c o nc e rns, a nd a dditio na l c o nside ra tio ns re g a rding this pro po se d use o f re c yc le d wa te r
Welcome and Overview Opening Remarks Topics for discussion Topic 1: Cannabis cultivation 1. Background on cannabis cultivation and water use 2. Overview of regulatory proposal 3. Discussion Topic 2: Centralized and onsite treatment systems 1. Definition of centralized and onsite systems 2. Overview of regulatory proposal 3. Discussion Topic 3: To be determined by stakeholders Wrap up, closing comments, evaluation, adjourn
30 minutes o f
disc ussio n
90 minutes o f
disc ussio n
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Co me pre pare d fo r the sc he dule d disc ussio n. Spe ak up so that e ve ryo ne c an he ar. Only o ne pe rso n sho uld spe ak at a time . Be c o nc ise . Avo id pe rso nal attac ks. Be re spe c tful o f o the rs’ pe rspe c tive s and re spo nsib ilitie s. So rt fo r similaritie s that may e xist in spite o f diffe re nc e s. L iste n c are fully and re spo nd in a manne r that mo ve s the disc ussio n fo rward. Cle arly ide ntify re maining diffe re nc e s that are no t re so lve d. Avo id sne ak attac ks. Re spe c t the pro c e ss b y le tting o the rs kno w o f po sitio ns and ac tio ns that will b e take n re g arding the issue s b e ing disc usse d. De c isio n making me tho d: Co nse nsus (e ve ryo ne unde rstands and c an live with the de c isio n), F all b ac k me tho d: Mino rity re po rt Avo id e nd runs. Re spe c t the pro c e ss b y le tting o the rs kno w if diffe re nc e s re main that will b e purse d in o the r ve nue s (e .g . dire c tly with o the r me mb e rs in the e xe c utive and/o r le g islative b ranc he s o f state o r fe de ral g o ve rnme nt. I de ntify c o nve rsatio ns that are n’ t wo rking . Bac ktrac k fro m po o r re sults.
http://colowqforum.org/pdfs/code-of- conduct/CWQF%20Code%20of%20Conduct.pdf
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Damian Higham S enior Planner Recycled Water Program Denver Water
Fort Collins Denver Colorado Springs
pe r ye ar (16,000 AF Y)
save d
ate distr ibution syste ms
Wastewater Treatment Process Preliminary Primary Secondary Tertiary/Advanced Disinfection Treatment Targets Large materials (rags, plastic bags, rocks, etc.) Medium particles & floating oils/grease Organic matter (compounds that would drop oxygen levels in receiving river) & some removal of trace chemical constituents and pathogens Some facilities go one step further to reduce pollutants of special concern (nitrogen, phosphorus, particles) & some removal of trace chemical constituents and pathogens Kill pathogens Industrial Pre-Treatment Treatment Targets Pollutants of special concern (some toxic chemicals, metals, pesticides, etc.) Recycled Water Treatment Process Advanced Disinfection Treatment Targets Pollutants of special concern (particles, pathogens) are removed by various treatment methods; some removal of trace chemical constituents, etc. is achieved Kill pathogens
Non-Potable Recycled Water Domestic Wastewater Industrial Wastewater Wastewater Effluent Treated Wastewater Conventional water treatment plant Potable Water Other water sources
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that health and environment are protected while water reuse expands”
AFY
– Increasing funding and incentives for water recycling and expanding the list of uses for which recycled water can be applied.
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Currently Allowed New Uses Being Proposed
washwater, and non-evaporative industrial processes)
road maintenance
washing
unrestricted, and resident-control)
irrigation and silviculture)
protection
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Current major types of water reuse practiced in Colorado Potential paradigm for water reuse practice in Colorado
Cooling and other industrial uses Landscape irrigation (seasonal) Non-food crop irrigation (seasonal) Cooling and other industrial uses Landscape irrigation (seasonal) Other non-food crop irrigation (seasonal)
Toilet flushing (year round) Cannabis irrigation (year-round)
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Category 1 Category 2 Category 3 Minimum Treatment Secondary Treatment with Disinfection Secondary Treatment with Filtration and Disinfection Secondary Treatment with Filtration and Disinfection
Limit 126 monthly geometric mean and 235 single sample max 126 monthly geometric mean and 235 single sample max None in 75% samples and 126 single sample max Turbidity Limit (NTU) < 3 monthly average and max 5 in <5% samples in a month < 3 monthly average and max 5 in <5% samples in a month Total Suspended Solids Limit 30 mg/L daily max Allowable Uses Industrial (evaporative, non- discharging construction and road maintenance, and non- evaporative industrial processes) Landscape irrigation (restricted) Commercial (zoo operations) Agricultural irrigation (Non- food crop irrigation and silviculture) Industrial (Category 1 uses, and washwater applications) Landscape irrigation (Category 1 uses, and unrestricted) Commercial (Category 1 uses, laundries, and automated and manual vehicle washing) Fire Protection (Nonresidential) Agricultural irrigation (Category 1 uses) Industrial (Category 2 uses) Landscape irrigation (Category 2 uses, and resident controlled) Commercial (Category 2 uses) Fire Protection (Category 2 uses and residential fire protection) Agricultural irrigation (Category 1 uses)
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Pro mo ting the use
while pro te c ting pub lic he a lth a nd the e nviro nme nt is the pa ra mo unt g o a l o f Re g 84. Ne wly pe rmitte d use s wo uld c re a te a dditio na l wa te r supply in a stre sse d syste m.
Po ta b le wa te r ma y no t b e ne c e ssa ry fo r c a nna b is c ultiva tio n & to ile t flushing . Ne wly pe rmitte d use s wo uld a llo w De nve r Wa te r to ta ke full a dva nta g e o f e xisting infra struc ture .
Regulation
codified in regulation to protect public health and the environment
Commission hearing to modify
Approved uses of recycled water Policy
provides specific requirements
CDPHE staff with approval by the commission; allows flexibility to incorporate new science
approved treatment processes Guidance
information to help utilities comply
staff
Procedures for cleaning the distribution system Not in scope
consideration in implementation, but not within the scope of a potential change to
supplemental guidance
Cost of dual-plumbing a facility
Damian Higham S enior Planner Recycled Water Program Denver Water
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9/27/2017 20 Grow and sales operations in the Denver Water service area Data from March 2017
– Water use in this industry is better than many – Efficiency benchmark highly dependent on how grown
– Indoor – Greenhouse – Field
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Hydroponic or soil Hand or automated Indoor or outdoor
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Water and nutrients monitored Hydroponic system avoids waste Pretreatment and water storage (for temp. equil.)
Avoid touching leaves Avoid standing water (pests and humidity) Nutrient levels monitored closely Some facilities pre-treat the water
Carbon filters Reverse osmosis (RO)
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Category 1 Category 2 Category 3 Minimum Treatment Secondary Treatment with Disinfection Secondary Treatment with Filtration and Disinfection Secondary Treatment with Filtration and Disinfection
Limit 126 monthly geometric mean and 235 single sample max 126 monthly geometric mean and 235 single sample max None in 75% samples and 126 single sample max Turbidity Limit (NTU) < 3 monthly average and max 5 in <5% samples in a month < 3 monthly average and max 5 in <5% samples in a month Total Suspended Solids Limit 30 mg/L daily max Allowable Uses Industrial (evaporative, non- discharging construction and road maintenance, and non- evaporative industrial processes) Landscape irrigation (restricted) Commercial (zoo operations) Agricultural irrigation (Non- food crop irrigation and silviculture) Industrial (Category 1 uses, and washwater applications) Landscape irrigation (Category 1 uses, and unrestricted) Commercial (Category 1 uses, laundries, and automated and manual vehicle washing) Fire Protection (Nonresidential) Agricultural irrigation (Category 1 uses) Industrial (Category 2 uses) Landscape irrigation (Category 2 uses, and resident controlled) Commercial (Category 2 uses) Fire Protection (Category 2 uses and residential fire protection) Agricultural irrigation (Category 1 uses)
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Category 1 Category 2 Category 3 Minimum Treatment Secondary Treatment with Disinfection Secondary Treatment with Filtration and Disinfection Secondary Treatment with Filtration and Disinfection
Limit 126 monthly geometric mean and 235 single sample max 126 monthly geometric mean and 235 single sample max None in 75% samples and 126 single sample max Comment
Based on values in EPA recreational water quality standards, which are “designed to protect primary contact recreation, including swimming, bathing, surfing, water skiing, tubing, water play by children, and similar water contact activities where a high degree
and ingestion are likely.” (Estimated rate of GI illness = 36 NGI in 1,000 primary contact recreators) Note: In 2012 EPA guidance moved to a statistical threshold value (STV) instead of a single sample max. Risk is equivalent. Exceeds EPA recreational water quality standards Exceeds Colorado Regulation 31 primary contact recreation standards
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Category 1 Category 2 Category 3 Minimum Treatment Secondary Treatment with Disinfection Secondary Treatment with Filtration and Disinfection Secondary Treatment with Filtration and Disinfection
Limit 126 monthly geometric mean and 235 single sample max 126 monthly geometric mean and 235 single sample max None in 75% samples and 126 single sample max
Use
During growing activities using a direct water application method (1) < 126 (as a geometric mean) (2) < 410 (as a statistical threshold value) Special conditions (e.g. sprouts, direct contact during/after harvest, hand washing, washing food contact surfaces) None detectable; water must not be untreated
USDA Food Safety Modernization Act (FSMA) Requirements for irrigation water: EPA & CO rec. water quality stds.
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Category 1 Category 2 Category 3 Minimum Treatment Secondary Treatment with Disinfection Secondary Treatment with Filtration and Disinfection Secondary Treatment with Filtration and Disinfection
Limit 126 monthly geometric mean and 235 single sample max 126 monthly geometric mean and 235 single sample max None in 75% samples and 126 single sample max
Use
During growing activities using a direct water application method (1) < 126 (as a geometric mean) (2) < 410 (as a statistical threshold value) Special conditions (e.g. sprouts, direct contact during/after harvest, hand washing, washing food contact surfaces) None detectable; water must not be untreated
USDA Food Safety Modernization Act (FSMA) Requirements for irrigation water: Proposal: Cat. 2 & 3 water for cannabis cultivation (meets or exceeds FSMA)
A. Link to Reg 11
A. O&M Manual B. Qualified personnel C. Routine & incident reporting
highly treated recycled water for cannabis cultivation?
category or another of reclaimed for this proposed use?
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Dan Arnold Denver Water
Domestic Wastewater (collected locally)
Decentralized Water Reuse Treatment Process Preliminary Primary Secondary Tertiary/Advanced Disinfection Treatment Targets Large materials (rags, plastic bags, rocks, etc.) Medium particles & floating oils/grease Organic matter (compounds that would drop oxygen levels in receiving river) & some removal of trace chemical constituents and pathogens Pollutants of special concern (particles, pathogens) are removed by various treatment methods; some removal of trace chemical constituents, etc. is achieved Kill pathogens
Non-Potable Recycled Water Note: System includes a backup connection to municipal sewer for emergency discharge Potable Water (from conventional municipal drinking water treatment plant)
Property line – treatment is physically located on property where wastewater is collected
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concentrations
further treatment wastewater from a domestic wastewater treatment
reuse.
the point of generation before the wastewater enters a publicly owned sewer system. The system treats the wastewater for the purpose of beneficial reuse near the location that generates the waste.
requirements for onsite systems in policy. Page 26 in WB
1. What are your general impressions? 2. What is your opinion of a regulatory demarcation between centralized and onsite systems? 3. How do you feel about treatment requirements for onsite systems being specified in policy rather than regulation?
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Co nta c t I nfo rma tio n:
Damian Higham
Se nio r Pla nne r 303.628.6537 da mia n.hig ha m@ de nve rwa te r.o rg
Y re c yc le d wa te r use d in the sta te is use d for food c rop irrig a tion
e nte ric dise a se
Drisc o lls.c o m (Mo st US strawb e rrie s c o me fro m Watso nville , CA and are irrig ate d with re c yc le d wate r) QMRA: Annua lize d me dia n risk o f infe c tio n ra ng e s fro m 10-8 to 10-4 ppy (de pe nding o n pa tho g e n) Co mpa re this to e stima te d dia rrhe a l dise a se inc ide nc e fo r a ll a g e s in de ve lo pe d c o untrie s: 0.2 ppy Ba se d o n this a na lysis, the NWRI I AP: 1. Did no t b e lie ve a t the time (2014) tha t CDPHE sho uld de ve lo p a n a c c e pta b le o r to le ra b le risk me tric fo r wa te r re c yc ling c rite ria 2. Co nfirme d c urre nt c rite ria do no t inc re a se pub lic he a lth risk a nd mo difying the sta nda rds will no t impro ve pub lic he a lth
Olivie ri e t a l.. Risk-Ba se d Re vie w o f Ca lifo rnia ’ s Wa te r-Re c yc ling Crite ria fo r Ag ric ultura l I rrig a tio n, J. E
ng . (2014). Ma the rs, e t a l. (2002). Glo b a l b urde n o f dise a se 2000: Ve rsio n 2 Me tho ds a nd re sults, Wo rld He a lth Org a niza tio n, Ge ne va .
CA: b a se d o n 1 in 10,000 risk o f infe c tio n fo r fo o d c ro p irrig a tio n Pe r re vie w o f Risk-Ba se d Re vie w o f Ca lifo rnia ’ s Wa te r-Re c yc ling Crite ria fo r Ag ric ultura l Irrig a tio n,
ng . (2014). Ba se d o n a risk o f 36 NGI (illne ss) pe r 1,000 fo r re c re a tio na l full-b o d y c o nta c t
1 illness ≈ 100 infections
Robert W. Hite Treatment Facility 130 mgd avg. (220 mgd capacity) Denver Water Recycling Plant 2-10 mgd (seasonal variability) (30 mgd capacity) = small portion of legally reusable supplies
1-10% of total flows
South Platte River