Colfax Municipal Code Appendix A Sewer user groups (CA)

(With January 2020 clarifications)

User Group Code	Main Group	Subcategory	EDU Rate Factor	EDU Rate Factor	EDU Basis
User Group Code	Main Group	Subcategory	Base	Add'l	EDU Basis
100. Residential	100. Residential	100. Residential	100. Residential	100. Residential	100. Residential
100. Residential	100. Residential	100. Residential	100. Residential	100. Residential	100. Residential	110	Single family dwellings	Single family dwellings	1.0
100. Residential	100. Residential	100. Residential	100. Residential	100. Residential	100. Residential	110	110.1	Accessory dwelling unit		0.8	Per 1000 sq. ft.
100. Residential	100. Residential	100. Residential	100. Residential	100. Residential	100. Residential	110	Ancillary uses (1)	Non-commercial swimming pool			Exempt from additional charges
Separate business structure			Separate account required
120	Multiple family dwellings (incl. Commercial)	Multiple family dwellings (incl. Commercial)	1.0		Minimum 1 EDU for first unit, plus:
120	120.1	Apartments, duplex, triplex		0.8	Per each additional dwelling unit
120	120.2	Bed and breakfast, boarding houses		0.4	Per each additional rental/sleeping room
120	120.3	Convalescent homes, community		0.6	Per each additional rental/sleeping room
120	120.4	Hotels, motels, resorts		0.3	Per unit
120	120.5	Trailer parks, mobile home parks		0.8	Per pad or space
120	Ancillary uses (1)	Examples: coffee shop or restaurant (220), health studio and/or spa/gym (211), self-serve laundry facilities (213), halls/auditoriums (210), and similar uses other than units for rent Pool; sanitary dump station = 1 EDU each	Examples: coffee shop or restaurant (220), health studio and/or spa/gym (211), self-serve laundry facilities (213), halls/auditoriums (210), and similar uses other than units for rent Pool; sanitary dump station = 1 EDU each	Examples: coffee shop or restaurant (220), health studio and/or spa/gym (211), self-serve laundry facilities (213), halls/auditoriums (210), and similar uses other than units for rent Pool; sanitary dump station = 1 EDU each	Examples: coffee shop or restaurant (220), health studio and/or spa/gym (211), self-serve laundry facilities (213), halls/auditoriums (210), and similar uses other than units for rent Pool; sanitary dump station = 1 EDU each
200. Non-Residential Commercial	200. Non-Residential Commercial	200. Non-Residential Commercial	200. Non-Residential Commercial	200. Non-Residential Commercial	200. Non-Residential Commercial
201	Auto dealerships (new and used)	Auto dealerships (new and used)	1.0	0.2	1 EDU min., to 1000 sq. ft.; 0.2 EDU each additional 1000 sq. ft. gross floor area
201	Ancillary uses (1)	Examples: garage and equipment rental/service yards (209), car wash (206), service stations for vehicle fueling (223), similar commercial services	Examples: garage and equipment rental/service yards (209), car wash (206), service stations for vehicle fueling (223), similar commercial services	Examples: garage and equipment rental/service yards (209), car wash (206), service stations for vehicle fueling (223), similar commercial services	Examples: garage and equipment rental/service yards (209), car wash (206), service stations for vehicle fueling (223), similar commercial services
202	Banks and financial institutions	Banks and financial institutions	1.0	0.3	1 EDU min., to 1000 sq. ft.; 0.3 EDU each additional 1000 sq. ft. gross floor area
202	Ancillary uses (1)	Examples:	Examples:	Examples:	Examples:
203	Bakeries	Bakeries	2.0	1.7	2 EDU min., to 1000 sq. ft.; 1 EDU each additional 1000 sq. ft. gross floor area
203	Ancillary uses (1)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)
204	Bars and taverns	Bars and taverns	1.0	1.0	1 EDU min to 1000 sq. ft.; 1 EDU each additional 1000 sq. ft.
204	Ancillary uses (1)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)
205	Bowling alleys	Bowling alleys	1.0	0.4	1 EDU minimum to 1000 sq. ft., plus 0.4 EDU each additional 1000 sq. ft. gross floor area
205	Ancillary uses (1)	Examples: restaurant (220), bar (204), retail store (221)	Examples: restaurant (220), bar (204), retail store (221)	Examples: restaurant (220), bar (204), retail store (221)	Examples: restaurant (220), bar (204), retail store (221)
206	Car wash	Car wash	1.0		1 EDU minimum (if stand alone), plus:
206	206.1	Self-service		1.0	1 EDU per stall
206	206.2	Automatic		3.0	3 EDU per wash rack
206	Ancillary uses (1)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)	Examples: coffee shop or restaurant (220)
207	Dry cleaners, commercial/industrial laundries	Dry cleaners, commercial/industrial laundries	1.7	1.7	1.7 EDU minimum up to 1000 sq. ft., plus 1.7 EDU per additional 1000 sq. ft. floor space
207	Ancillary uses (1)	Examples: self-service laundry (213)	Examples: self-service laundry (213)	Examples: self-service laundry (213)	Examples: self-service laundry (213)
208	Fire stations	Fire stations	1.0	0.6	1 EDU up to 1000 sq. ft.; 0.6 EDU each additional 1000 sq. ft.
208	Ancillary uses (1)	Not applicable—Base rate factor for fire stations includes all rooming and cooking facilities for staff, all equipment and vehicle service and fueling	Not applicable—Base rate factor for fire stations includes all rooming and cooking facilities for staff, all equipment and vehicle service and fueling	Not applicable—Base rate factor for fire stations includes all rooming and cooking facilities for staff, all equipment and vehicle service and fueling	Not applicable—Base rate factor for fire stations includes all rooming and cooking facilities for staff, all equipment and vehicle service and fueling
209	Garages and equipment rental/service yards	Garages and equipment rental/service yards	1.0	1.0	1 EDU minimum (if stand alone), plus 1 EDU per 10 repair bays
209	Ancillary uses (1)	Examples: car wash (206), service station (223), industrial (400)	Examples: car wash (206), service station (223), industrial (400)	Examples: car wash (206), service station (223), industrial (400)	Examples: car wash (206), service station (223), industrial (400)
209	Note	Production and release of hazardous wastes to sewer very possible; may require mitigation	Production and release of hazardous wastes to sewer very possible; may require mitigation	Production and release of hazardous wastes to sewer very possible; may require mitigation	Production and release of hazardous wastes to sewer very possible; may require mitigation
210	Halls, lodges and auditoriums	Halls, lodges and auditoriums	1.0	0.3	1 EDU minimum to 1000 sq. ft., plus 0.3 EDU each 1000 sq. ft. floor space
210	Ancillary uses (1)	Examples: coffee shop or restaurant (220), bars and taverns (204), pool	Examples: coffee shop or restaurant (220), bars and taverns (204), pool	Examples: coffee shop or restaurant (220), bars and taverns (204), pool	Examples: coffee shop or restaurant (220), bars and taverns (204), pool
211	Health studios, beauty salons, spas and gyms	Health studios, beauty salons, spas and gyms	2.0	1.0	2 EDU minimum up to 1000 sq. ft.; 1 EDU each additional 1000 sq. ft.
211	Ancillary uses (1)	Examples: food preparation and service area, equivalent of "restaurant" (220); pool	Examples: food preparation and service area, equivalent of "restaurant" (220); pool	Examples: food preparation and service area, equivalent of "restaurant" (220); pool	Examples: food preparation and service area, equivalent of "restaurant" (220); pool
212	Hospitals, Medical Clinics, EMT Facilities	Hospitals, Medical Clinics, EMT Facilities	2.0	1.0	2 EDU minimum (if stand alone), plus 1 EDU per 10 licensed beds or equivalent care stations
212	Ancillary uses (1)	Examples: coffee shop or restaurant (220), commercial/industrial laundry (207)	Examples: coffee shop or restaurant (220), commercial/industrial laundry (207)	Examples: coffee shop or restaurant (220), commercial/industrial laundry (207)	Examples: coffee shop or restaurant (220), commercial/industrial laundry (207)
212	Note	Wastewater may require treatment for chemical, biological, radiological hazards	Wastewater may require treatment for chemical, biological, radiological hazards	Wastewater may require treatment for chemical, biological, radiological hazards	Wastewater may require treatment for chemical, biological, radiological hazards
213	Laundries: self-service laundromats	Laundries: self-service laundromats	1.0	0.3	1 EDU minimum (if stand alone), plus 0.3 EDU per washing machine
213	Ancillary uses (1)	Examples:	Examples:	Examples:	Examples:
213	Note	Wastewater may require treatment for high chemical loading	Wastewater may require treatment for high chemical loading	Wastewater may require treatment for high chemical loading	Wastewater may require treatment for high chemical loading
214	Markets, and "mini-marts"	Markets, and "mini-marts"	1.0	0.5	1 EDU minimum to 1000 sq. ft., plus 0.5 EDU each additional 1000 sq. ft.
214	Ancillary uses (1)	Examples: coffee shop, food prep and service to public, equivalent of "restaurant" (220), bakeries (203)	Examples: coffee shop, food prep and service to public, equivalent of "restaurant" (220), bakeries (203)	Examples: coffee shop, food prep and service to public, equivalent of "restaurant" (220), bakeries (203)	Examples: coffee shop, food prep and service to public, equivalent of "restaurant" (220), bakeries (203)
215	Medical and dental offices	Medical and dental offices	1.0	0.5	1 EDU minimum to 1000 sq. ft., plus 0.5 EDU each additional 1000 sq. ft.
215	Ancillary uses (1)	Examples: hospital (including laboratory preparation area) (212)	Examples: hospital (including laboratory preparation area) (212)	Examples: hospital (including laboratory preparation area) (212)	Examples: hospital (including laboratory preparation area) (212)
215	Note	Wastewater may require treatment for chemical, biological, radiological hazards	Wastewater may require treatment for chemical, biological, radiological hazards	Wastewater may require treatment for chemical, biological, radiological hazards	Wastewater may require treatment for chemical, biological, radiological hazards
216	Mortuaries	Mortuaries	1.0	1.0	1 EDU minimum, plus 1 EDU per "slumber room"
216	Ancillary uses (1)	Examples: hospital (including laboratory/forensics preparation area) (212)	Examples: hospital (including laboratory/forensics preparation area) (212)	Examples: hospital (including laboratory/forensics preparation area) (212)	Examples: hospital (including laboratory/forensics preparation area) (212)
217	Office buildings	Office buildings	1.0	0.2	1 EDU minimum to 1000 sq. ft. (if stand alone); plus 0.2 EDU per additional 1000 sq. ft. gross floor area
217	Ancillary uses (1)	Examples: complex may provide common facilities: pool, gym with showers (211); cafeteria (220)	Examples: complex may provide common facilities: pool, gym with showers (211); cafeteria (220)	Examples: complex may provide common facilities: pool, gym with showers (211); cafeteria (220)	Examples: complex may provide common facilities: pool, gym with showers (211); cafeteria (220)
217	Note	May have high chemical (cleaning product) loading. Rapid change in tenancy can dramatically impact sewer characteristics.	May have high chemical (cleaning product) loading. Rapid change in tenancy can dramatically impact sewer characteristics.	May have high chemical (cleaning product) loading. Rapid change in tenancy can dramatically impact sewer characteristics.	May have high chemical (cleaning product) loading. Rapid change in tenancy can dramatically impact sewer characteristics.
218	Parks and fairgrounds	Parks and fairgrounds	1.0	1.0	1 EDU minimum, 1 EDU per restroom ("comfort station") complex: (men's, women's and janitorial supply)
218	Ancillary uses (1)	Examples: trailer/RV spaces (120); spa/gym w/ showers (211); halls, auditoriums (210); permanent food service area(s), as equivalent of "restaurant" (220); equipment service, storage and/or maintenance yards (209) Sanitary dump stations = 1 EDU each; pool	Examples: trailer/RV spaces (120); spa/gym w/ showers (211); halls, auditoriums (210); permanent food service area(s), as equivalent of "restaurant" (220); equipment service, storage and/or maintenance yards (209) Sanitary dump stations = 1 EDU each; pool	Examples: trailer/RV spaces (120); spa/gym w/ showers (211); halls, auditoriums (210); permanent food service area(s), as equivalent of "restaurant" (220); equipment service, storage and/or maintenance yards (209) Sanitary dump stations = 1 EDU each; pool	Examples: trailer/RV spaces (120); spa/gym w/ showers (211); halls, auditoriums (210); permanent food service area(s), as equivalent of "restaurant" (220); equipment service, storage and/or maintenance yards (209) Sanitary dump stations = 1 EDU each; pool
218	Note	May include confined animal facilities; if sewered, consider additional impacts	May include confined animal facilities; if sewered, consider additional impacts	May include confined animal facilities; if sewered, consider additional impacts	May include confined animal facilities; if sewered, consider additional impacts
219	Places of worship	Places of worship	2.0	0.2	2 EDU per facility, up to 10,000 sq. ft. gross floor space, plus 0.2 EDU per each additional 1000 sq. ft. 1 EDU additional per each residence on site.
219	Ancillary uses (1)	Examples: full kitchen, for food preparation and service equivalent to "restaurant" (220); community care rooms rented (120)	Examples: full kitchen, for food preparation and service equivalent to "restaurant" (220); community care rooms rented (120)	Examples: full kitchen, for food preparation and service equivalent to "restaurant" (220); community care rooms rented (120)	Examples: full kitchen, for food preparation and service equivalent to "restaurant" (220); community care rooms rented (120)
220	Restaurants	Restaurants			Base EDU min to 1000 sq. ft., (if stand alone), plus:
220	220.1	Take-out only	1.0	1.0	1 EDU per 1000 sq. ft. additional gross floor area
220	220.1	Full service	2.0	2.0	2 EDU per 1000 sq. ft. additional gross floor space
220	Ancillary uses (1)	Examples: bar (204); market (214); retail "gift shop" (221)	Examples: bar (204); market (214); retail "gift shop" (221)	Examples: bar (204); market (214); retail "gift shop" (221)	Examples: bar (204); market (214); retail "gift shop" (221)
221	Retail stores	Retail stores	1.0	0.5	1 EDU minimum to 1000 sq. ft.; 0.5 EDU per each additional 1000 sq. ft. gross floor area
221	Ancillary uses (1)	Examples: complex may include coffee shop, cafeteria or restaurant (220)	Examples: complex may include coffee shop, cafeteria or restaurant (220)	Examples: complex may include coffee shop, cafeteria or restaurant (220)	Examples: complex may include coffee shop, cafeteria or restaurant (220)
221	Note	Rapid change in tenancy, as with office buildings, can result in dramatic change in sewage	Rapid change in tenancy, as with office buildings, can result in dramatic change in sewage	Rapid change in tenancy, as with office buildings, can result in dramatic change in sewage	Rapid change in tenancy, as with office buildings, can result in dramatic change in sewage
222	Schools	Schools
222	222.1	Elementary	1.0	1.0	1 EDU minimum, 1 EDU per 20 students (ADA) plus staff
222	222.2	Secondary	2.0	1.0	2 EDU minimum, 1 EDU per 10 students (ADA) plus staff
222	Ancillary uses (2)	Not applicable: ancillary facilities weighed in rate factor	Not applicable: ancillary facilities weighed in rate factor	Not applicable: ancillary facilities weighed in rate factor	Not applicable: ancillary facilities weighed in rate factor
222	Note	"ADA" = average daily attendance, or the actual number of students attending class	"ADA" = average daily attendance, or the actual number of students attending class	"ADA" = average daily attendance, or the actual number of students attending class	"ADA" = average daily attendance, or the actual number of students attending class
223	Service stations	Service stations	1.0	0.1	1 EDU minimum plus 0.1 EDU per pump
223	Ancillary uses (1)	Examples: car wash (206); garage, equipment service/repair (209); market or "mini-mart" (214); food; service (220); industrial: "paint and body shop" (400)	Examples: car wash (206); garage, equipment service/repair (209); market or "mini-mart" (214); food; service (220); industrial: "paint and body shop" (400)	Examples: car wash (206); garage, equipment service/repair (209); market or "mini-mart" (214); food; service (220); industrial: "paint and body shop" (400)	Examples: car wash (206); garage, equipment service/repair (209); market or "mini-mart" (214); food; service (220); industrial: "paint and body shop" (400)
223	Note	Production and release of hazardous wastes to sewer very possible: may require mitigation	Production and release of hazardous wastes to sewer very possible: may require mitigation	Production and release of hazardous wastes to sewer very possible: may require mitigation	Production and release of hazardous wastes to sewer very possible: may require mitigation
224	Theaters	Theaters	1.0	0.4	1 EDU minimum to 1000 sq. ft., plus 0.4 EDU per additional 1000 sq. ft. Snack bar included in base allocation
224	Ancillary uses (1)	Examples: full-service restaurant (220); retail sales area (221); if life production theater: may provide gym with showers (211)	Examples: full-service restaurant (220); retail sales area (221); if life production theater: may provide gym with showers (211)	Examples: full-service restaurant (220); retail sales area (221); if life production theater: may provide gym with showers (211)	Examples: full-service restaurant (220); retail sales area (221); if life production theater: may provide gym with showers (211)
225	Warehouses and storage facilities	Warehouses and storage facilities	1.0	1.0	1 EDU minimum, 1 EDU per 10,000 sq. ft. plus 1 EDU if manager's quarters on-site
225	Ancillary uses (1)	Examples: industrial/manufacturing activities (400)	Examples: industrial/manufacturing activities (400)	Examples: industrial/manufacturing activities (400)	Examples: industrial/manufacturing activities (400)
300	Non-defined commercial	Non-defined commercial	1.0		1 EDU minimum, plus additional allocation on per-case basis
300	Ancillary uses (1)	Examples: attempt should be made to assign undefined commercial user to one or more existing user group, based on assumed sewage characteristics. New user, or significant changes in flow volume/loading at existing facility, will need to be re-characterized and reported at user's expense. Wholly new categories should be considered for addition by amendment to ordinance.	Examples: attempt should be made to assign undefined commercial user to one or more existing user group, based on assumed sewage characteristics. New user, or significant changes in flow volume/loading at existing facility, will need to be re-characterized and reported at user's expense. Wholly new categories should be considered for addition by amendment to ordinance.	Examples: attempt should be made to assign undefined commercial user to one or more existing user group, based on assumed sewage characteristics. New user, or significant changes in flow volume/loading at existing facility, will need to be re-characterized and reported at user's expense. Wholly new categories should be considered for addition by amendment to ordinance.	Examples: attempt should be made to assign undefined commercial user to one or more existing user group, based on assumed sewage characteristics. New user, or significant changes in flow volume/loading at existing facility, will need to be re-characterized and reported at user's expense. Wholly new categories should be considered for addition by amendment to ordinance.
400	Industrial and manufacturing	Industrial and manufacturing	2.0		2 EDU minimum, plus additional allocation on per-case basis, plus additional applicable industrial wastewater fees
400	Ancillary uses (1)	Examples: garage, equipment/vehicle repair (209); storage (225)	Examples: garage, equipment/vehicle repair (209); storage (225)	Examples: garage, equipment/vehicle repair (209); storage (225)	Examples: garage, equipment/vehicle repair (209); storage (225)
400	Note	Production and release of hazardous wastes to sewer very possible: may require mitigation. Industrial wastewater discharge permit may be required.	Production and release of hazardous wastes to sewer very possible: may require mitigation. Industrial wastewater discharge permit may be required.	Production and release of hazardous wastes to sewer very possible: may require mitigation. Industrial wastewater discharge permit may be required.	Production and release of hazardous wastes to sewer very possible: may require mitigation. Industrial wastewater discharge permit may be required.

(1) Ancillary uses: EDU allocation increases for each ancillary use provided on premises. Ancillary uses are added to the base allocation, according to criteria for each category of use. Minimum requirement in each category does not apply for ancillary uses.

(2) EDU allocations for schools are based on standard strength characteristics and average sewer flows provided by the state water resources control board.

(Ord. 475 § 2(b) (part), 2002: prior code § 6-3.401; Ord. No. 540, § 1(Exh. A), 1-22-2020)