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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