EXHIBIT 3-C

 

DRAFT GRAYWATER SURVEY SUMMARY

 

 

In California gray water is defined as untreated waste water that has not come in contact with toilet waste.  Blackwater is untreated waste water from kitchen sinks, industrial processes and toilets.

 

Currently the California Administrative Code and the California Plumbing Code prohibits the use of graywater for any commercial or residential indoor plumbing.

 

All California County Health Departments prohibit the use of graywater for residential or commercial indoor plumbing.

 

Untreated graywater is only allowed to be used in subsurface outdoor irrigation, by permit and an approved system in commercial, industrial and multi-family projects, as well as in single family residences.  Permit fees range from $100 to $1,000, for single family residences, depending on the jurisdiction.  This alone can be cost prohibitive to residential outdoor use.

 

To use graywater for surface irrigation, it must be treated to meet each county’s health regulations and water district’s rules. 

 

Current rules and regulations for permitting a system for outdoor use are ultra conservative and restrictive and differ widely by jurisdictions through out California.

 

Challenges:

 

  • California Administrative Code/California plumbing Code/California Department of Water Resources and County Health Departments-conservative and overly restrictive.

 

  • State, County and City jurisdiction building codes and requirements-can vary widely by jusrisdictions, for graywater systems.

 

  • High cost for permit fees, inspections, studies and  retro-plumbing for system installation

 

  • Long and time consuming process to actually pass inspection and use system

 

Solutions:

 

  • Review recent national and world wide studies regarding health standards for less conservative and restrictive health codes regarding graywater.

 

  • Review/amend department of Water Resources standards for residential, commercial and multi-family dwellings regarding indoor and outdoor use of graywater.

 

  • Vertically integrate the process so inspectors, building and safety people, and any other required people are on the same page, so the process is simplified for homeowners.

 

  • Consider and act on the specific suggestions noted in article by Oasis Design, regarding improvements to California’s Greywater Laws.  See Attachment

 

  • Consider dual plumbing on all new construction for current or future graywater applications.

 

Conservation/Environmental Advantages:

 

  • Conserve fresh water.
  • Increase urban greenery
  • Reduce flow through water treatment plants, improving treatment and lowering taxpayer costs.
  • Reduce pollution of ocean and waterways
  • Recharge municipal ground water

 

 

 

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