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Animal Care & Control - Found Pet
Animal Care & Control - Licensing
Animal Care & Control - Lost Pet
Animal Care & Control - Pet Adoption
Animal Care & Control - Pet Care Services
Animal Care & Control - Recurring Donations
Animal Care & Control - Services & Fees
Animal Care & Control - Shelter Plans
Cave Creek Landfill
Community Emergency Notification System
Constables - Frequently Asked Questions
Correctional Health Services
County Improvement Districts
COVID-19 Vaccine Vendor Frequently Asked Questions
Dental Sealant Program
Dependency Court - Appeals
Dietetic Internship Full-Time Track
Dietetic Internship Tracks
Dietetic Internship WIC Track
Disinterment / Reinterment Permit
Emergency Management Preparedness and Response
Family Support
Fetal Death Certificates
Fetal Death Permit
Flood Control - Flood Insurance
Flood Control - Flood Insurance (Español)
Flood Control - Floodplains
Flood Control - Floodplains (Español)
Flood Control - General
Flood Control - General (Español)
Flood Control - Permits
Flood Control - Permits (Español)
Flood Control - Projects & Studies
Flood Control - Projects & Studies (Español)
Flood Control - Property & Maintenance
Flood Control - Property & Maintenance (Español)
Flood Control - Rainfall & Weather
Flood Control - Rainfall & Weather (Español)
Flood Control - Storm Assistance
Flood Control - Storm Assistance (Español)
HIV
HSD - CCRA Responses to Landlords
Human Services - Education / Head Start
Immunizations
Información sobre la clínica - Preguntas más frecuentes
Initiating a Remote Attestation
Internal Audit
Juvenile Court - Delinquency FAQs
Juvenile Court - Mental Competency
La Gripe - Preguntas Comunes
Maricopa County Lead Safe Phoenix Partnership
MCDOT
MCDOT - Permits
MCDOT Contracts
MCDOT Plat Index
MCDOT Roads
Non-Contagious Disease Letter
Office of the Medical Examiner FAQs
Onsite Wastewater Systems
Palo Verde Nuclear Generating Station
Planning & Development - Agricultural Exemption
Planning & Development - Commercial
Planning & Development - Community Residences / Recovery Community
Planning & Development - Compliance / Special Inspection
Planning & Development - Drainage
Planning & Development - Home Occupation
Planning & Development - Legal Non-Conforming
Planning & Development - Manufactured Housing
Planning & Development - Permits
Planning & Development - Plan of Development
Planning & Development - Property History
Planning & Development - Property Research
Planning & Development - Residential
Planning & Development - Temporary Power
Planning & Development - Temporary Use
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Planning & Development - Variance Requests
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Procurement Services
Public Advocate
Public Advocate - Restoration of Rights
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Public Defender - Courts & Case
Public Defender - Non-Criminal Matters
Public Defender - Office FAQ
Public Defender - Restoration of Rights
Public Fiduciary - Burial Information
Public Fiduciary - GUARDIANSHIP AND/OR CONSERVATORSHIP
Public Health - Birth Certificates
Public Health - Death Certificates
Public Health - Flu FAQ
Queen Creek Landfill
Rabies
Real Estate
Solid Waste
Solid Waste - Bio-Hazardous Medical Waste Transportation
Solid Waste - Chemical Toilets, Portable Restroom Units & Portable Waste Holding Tanks
Solid Waste - Construction & Debris Landfills
Solid Waste - Non-Hazardous Liquid Waste (NHLW) Transportation
Solid Waste - Non-Hazardous Liquid Waste Transfer Facilities
Solid Waste - Non-Hazardous Solid Waste (NHSW) Transportation
Solid Waste - Refuse Containers
STD Clinic
Stormwater Quality Program
Subdivision & Infrastructure - Approvals
Subdivision & Infrastructure - Documentation
Subdivision & Infrastructure - Engineering Design
Subdivision & Infrastructure - Engineering Design - Reclaimed Water Facilities & Systems
Subdivision & Infrastructure - Engineering Design - Wastewater Facilities & Systems
Subdivision & Infrastructure - Engineering Design - Water Facilities & Systems
Subdivision & Infrastructure - Projects
Swimming Pools Management - Approvals
Swimming Pools Management - Construction
Swimming Pools Management - Design
Swimming Pools Management - General
Swimming Pools Management - Operating Permits
Swimming Pools Management - Operations & Maintenance
Swimming Pools Management - Projects
Swimming Pools Management - Variances
TB Control & Prevention
Vector Control - Roof Rats
Vector Control - West Nile Virus
Waste Resources - Disposals
Waste Resources - Operations
Water & Waste Management
Water & Waste Management: Approvals
Water & Waste Management: Documentation
Water & Waste Management: Drinking Water Approvals and Permits
Water & Waste Management: Drinking Water General
Water & Waste Management: Drinking Water Quality
Water & Waste Management: Engineering Design
Water & Waste Management: Engineering Design - Reclaimed Water Facilities & Systems Engineering Design
Water & Waste Management: Engineering Design - Wastewater Treatment Facilities & Systems Engineering Design
Water & Waste Management: Engineering Design - Water Treatment Facilities & Systems Engineering Design
Water & Waste Management: MAG 208 Certification
Water & Waste Management: Operating Permits
Water & Waste Management: Operations & Maintenance
Water & Waste Management: Projects
Women Infants & Children (WIC)
What are the design requirements for wet well, basin, tank or reservoir overflows?
Overflows of wastewater must be contained and not allowed to spill onto the ground. A suitable means of onsite containment must be included in the design.
Counterweighted flapper valves or self-sealing valves which open and close automatically when an overflow occurs must be installed on the end of the overflow discharge pipe to control odors and prevent the ingress of birds and insects. For more information, please call 602-506-1058.
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Subdivision & Infrastructure - Engineering Design - Wastewater Facilities & Systems
Show All Answers
1.
Is emergency power required for sewer collection system lift stations?
Yes in most cases. Maricopa County Environmental Health Code (MCEHC) Chapter I, Section 2, Regulation 5 states: "For systems that treat, or which are designed to treat greater than 10,000 gallons/day, a standby power source shall be provided at all sewage treatment systems and/or pump stations where a temporary power failure may allow a discharge of raw or partially treated sewage. Standby power may be via a standby generator, separate feeders from separate substations, a loop feeder on separate transformers from a common substation, or a high-level alarm with portable generators. Standby power also shall be provided to any sewage treatment systems and/or pump stations, regardless of size, if a temporary power failure may allow a discharge into surface waters classified as 'Unique Waters', by the Arizona Department of Environmental Quality."
This is also a requirement for obtaining a Type 4 General Aquifer Protection Permit for a sewer collection system as described in Arizona Administrative Code R18-9-E301.D.5f. For more information, please call 602-506-1058.
2.
What are the design requirements for venting wet wells, dry wells, basins, tanks and reservoirs?
All wet wells, dry wells, basins, tanks and reservoirs require venting. Wet and dry wells require forced ventilation and basins, tanks and reservoirs require normal ventilation.
Wet wells require 12 continuous air changes per hour or 60 intermittent air changes per hour based on the volume of the head space above the minimum sewage level. Dry wells require 6 continuous air changes per hour or 30 intermittent air changes per hour based on the volume of the dry well.
Wet wells and dry wells are usually vented by force draft fans or blowers in combination with odor control devices located on the ventilation discharge from the wet or dry well. National Fire Protection Association (NFPA) Section 820 specifies that all continuous ventilation systems should be fitted with flow detection devices connected to an alarm system to indicate ventilation system failure.
Basins, tanks and reservoirs are usually vented using inverted 'U' type, 'chair' or cross-flow vents using normal air currents. In all cases, vents shall have a 16-mesh corrosion resistant screen installed to prevent the ingress of birds and insects. For more information, please call 602-506-1058.
3.
What are the design requirements for wet well, basin, tank or reservoir overflows?
Overflows of wastewater must be contained and not allowed to spill onto the ground. A suitable means of onsite containment must be included in the design.
Counterweighted flapper valves or self-sealing valves which open and close automatically when an overflow occurs must be installed on the end of the overflow discharge pipe to control odors and prevent the ingress of birds and insects. For more information, please call 602-506-1058.
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