Operator ChallengesMeeting Both Drinking Water and Wastewater Needs

Vanessa Wike, P.E.Drinking Water ProgramStatewide Engineering Coordinator(907) 269-7696555 Cordova St.Anchorage, AK 99501vanessa.wike@alaska.gov

Department of Environmental ConservationSustained Compliance for Public Water Systems, Chapter 2Anchorage, AlaskaSeptember 29, 2011

James MacInnis, P.E.Wastewater ProgramStatewide Engineering Coordinator(907) 269-4874555 Cordova St.Anchorage, AK 99501James.macinnis@alaska.gov

Overview• Engineering Oversight

– Drinking Water– Wastewater

• Water WastewaterUnintended Impacts to Wastewater System

• Filter Discharges• System Discharges (Disinfection, Flushing, Leaks)

• Water WastewaterIncreased Risk of Contamination

• Water / Wastewater Separation Issues• Cross Connection Control• Drains

Drinking Water Engineering

Goals- Public Health

Activities- Plan Review- Inspections- Technical Assistance

“At any given time, half of the world’s hospital beds are occupied by patients suffering from diseases associated with lack of access to safe drinking water, inadequate sanitation and poor hygiene.” (2006 United Nations Human Development Report)

Bill Smyth, EIT 451-2177bill.smyth@alaska.gov

Oran Woolley 376-1852oran.woolley@alaska.gov

Bill Rieth, PE 269-7519bill.rieth@alaska.gov

Monica English 262-5210 x229monica.english@alaska.gov

Joran Freeman 465-5167joran.freeman@alaska.gov

Fair

bank

sM

at-S

uAn

chor

age

Vacant, PE (Lead) 269-3076

Chris Clark, EIT 269-7516chris.clark@alaska.gov

Dan Reichardt, EIT 269-7631daniel.reichardt@alaska.gov

Bill Tyrell, PE 269-6064william.tyrell@alaska.gov

Scott Forgue, PE (Lead) 262-3471scott.forgue@alaska.gov

Katrina Ladd, EIT 262-3400katrina.ladd@alaska.gov

David Khan, PE 465-5317david.khan@alaska.gov

Roy Robertson, PE (Lead) 376-1862roy.robertson@alaska.gov

Braden Galloway, PE 376-1846braden.galloway@alaska.gov

New Vacant, EIT 376- ####

Lee Johnson, PE (Lead) 451-2179lee.johnson@alaska.gov

Michael Jaynes, EIT 451-2165michael.jaynes@alaska.gov

Shawna Laderach, PE 451-5032shawna.laderach@alaska.gov

Johnny Mendez, PE 451-5193johnny.mendez@alaska.gov

JS

AM

F

WASTEWATER ENGINEERS

Northern/Fairbanks Office610 University Ave Fairbanks, AK 99709

Mat-Su Office1700 E. Bogard Rd , Bldg B, Suite 103 Wasilla, AK 99654

Juneau Office (wastewater only)410 Willoughby Ave., Suite 303 Juneau, AK 99801

Kenai/Southeast Office43335 Kalifornsky Beach Rd., Ste 11 Soldotna, AK 99669

Southcentral/Anchorage Office555 Cordova Street Anchorage, AK 99501

MAILING ADDRESSES

Kena

i/So

uthe

ast

DRINKING WATER ENGINEERS

Wastewater Engineering

Goals- Public Health- Environment

Activities- Plan Review

- Permits- Technical Assistance

Drinking Water Wastewater

SourceTreatment & Storage Distribution

Treatment & Storage

Collection

Discharge“At any given time, half of the world’s hospital beds are occupied by patients suffering from diseases associated with lack of access to safe drinking water, inadequate sanitation and poor hygiene.” (2006 United Nations Human Development Report)

Filter Operations

Conventional, Direct, Green Sand

Membrane

Iron Oxide Media

Ion Exchange (water softeners)

System Discharges

operations, disinfection,

flushing, leaks

Drinking Water Wastewater

Filter Discharges

• “Filter to Waste” flows

• Typically less concentrated

contaminants, but possible

sediment, sludge

Conventional, Direct, Green Sand

• Big backwash flows periodically (15 gpm, for 15-20 minutes)

Filter Backwash Pond

Filter Discharges, cont.

Membrane

• Reject water flows constantly

• Chemically concentrated

Filter Discharges, cont.

Iron Oxide Media

• Big flows periodically, may

contain Arsenic

Ion Exchange (water softeners)• Periodic flows, usually minimal• Small amounts of

Calcium/Magnesium/Iron and possibly Arsenic

System DischargesOther issues :• Sludge (possibly, for systems adding a coagulant)

• Disinfection & Flushing

• Leaks

Discharges to Wastewater

Checklist

• WHERE is it going?

• HOW MUCH (volume) is being generated?

• WHAT is in the backwash water?

Discharge Requirements

• To Groundwater (drain field, percolation pond, etc.)

– Meet Drinking Water Standards– Plan Review

• To Surface Water (stream, lake, ocean, etc.)

– APDES Permit is required– Plan Review– Salmon Stream Restrictions

Discharge Limits

• Groundwater– Drinking Water Standards

• Surface Water– No Impairment of water body– Case-by-case basis (APDES)– Water Quality Standards, 18 AAC 70

Potential Cross Contamination

Separation Distances

Water Source

Public Water Line

Cross Connection Control

Backflow Prevention

Drains

Drinking Water Wastewater

Potential Cross Contamination

Separation Distances

Water Source vs. Wastewater

Public Water Lines vs. Wastewater

Cross Connection Control

Backflow Prevention

Drains

Required Separation Distances

Only 62% of the world’s population has access to improved sanitation – defined as a sanitation facility that ensures hygienic separation of human excreta from human contact. UNICEF/WHO. 2008.

Water System

Community Sewer Line , Wastewater Holding Tank & “Other”

Treatment & Disposal System (Septic Tank, Absorption Field) Community Sewer Cleanout

Private Sewer Line, Private Sewer Cleanout

Fuel Tank , Fuel Line

Source Serving: Federally Regulated PWS 200 ‘ 200 ‘ 100 ‘ 100 ‘

Source Serving: State Regulated 100 ‘ 150 ‘ 75 ‘ 75 ‘

Source Serving: Private 75 ‘ 75 ‘ 25 ‘ 25 ‘

Waterline 10 ‘ 10 ‘ 10 ‘ 10 ‘

This is a summary. For a complete set of separation distance requirements, refer to Drinking Water Regulations 18 AAC 80, and Wastewater Regulations 18 AAC 72.If you have any questions or concerns about meeting a separation distance requirement, please contact an Drinking Water or Wastewater Engineer BEFORE construction.

SummaryProtect your wastewater system• Don’t poison your system (pretreatment)

Protect your environment

• Keep inadequately treated sewage off the ground, out of groundwater and out of surface water

Protect your drinking water

• Don’t contaminate your drinking water by connecting it to wastewater

The majority of the illness in the world is caused by fecal matter.Water Supply and Sanitation Collaborative Council (WSSCC) 2008.

Summary

Call engineering if you have questions ….

ReferencesDrinking Water Engineering:

• http://www.dec.state.ak.us/eh/dw/dwmain/engineering.html

Wastewater Engineering: • http://www.dec.state.ak.us/water/wwdp/onsite/index.htm• http://www.dec.state.ak.us/water/wwdp/engineering/engineering.htm

EPA Cross Connection Control Manual: • http://www.epa.gov/ogwdw/pdfs/crossconnection/crossconnection.pdf

Alaska Drinking Water Regulations: • http://www.dec.state.ak.us/regulations/pdfs/18%20AAC%2080.pdf

Alaska Wastewater Regulations: • http://www.dec.state.ak.us/regulations/pdfs/18%20AAC%2072.pdf

Alaska Water Quality Regulations:• http://www.dec.state.ak.us/regulations/pdfs/18%20AAC%2070.pdf

Contacts

James MacInnis555 Cordova St.Anchorage, AK 99501(907) 269-4874James.macinnis@alaska.gov

Vanessa Wike555 Cordova St.Anchorage, AK 99501(907) 269-7696vanessa.wike@alaska.gov

DEC Drinking Wastewater Program Engineering Grouphttp://dec.alaska.gov/eh/dw/dwmain/engineering.html

DEC Drinking Water Program Engineering Group… coming soon …