| (a) Filter backwash wastewater disposal. Filter backwash,
cartridge wash water, and drainage water that is not reused in the
pool or spa must be discharged or disposed of in accordance with the
requirements of the TCEQ or local regulatory authority.
(b) No direct connection. No direct mechanical (hard)
connection may be made between the pool or spa, the drains, the chemical
treatment equipment, or the system of piping and the sanitary sewer
system, septic system, or other wastewater disposal system.
(c) Pool and spa backwash. Backwash water and draining
water must be discharged through an air gap formed by positioning
the discharge pipe opening at least two pipe diameters above the overflow
level of any barriers that could cause flooding and submergence of
the discharge opening or by other means in accordance with TCEQ requirements.
Splash screening barriers are permitted, as long as the barriers do
not destroy air gap effectiveness.
(d) Wastewater post treatment. Filter backwash water
and circulation system drainage water must be treated either chemically
or through use of settling tanks to eliminate or neutralize chemicals,
diatomaceous earth, and other contaminants in the water that exceed
discharge limits set by TCEQ or the local regulatory authority.
(e) Other wastewater or drainage water disposal facilities
or lines. The location of other wastewater disposal facilities or
lines must meet applicable standards of 30 TAC Chapter 307, Texas
Surface Water Quality Standards, Chapter 308, Criteria and Standards
for the National Pollutant Discharge Elimination System, Chapter 311,
Watershed Protection, and Chapter 315, Pretreatment Regulations for
Existing and New Sources of Pollution, or the local regulatory authority.
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