25 Pa. Code § 73.32 - Standards for aerobic treatment tanks
(a) Capacity shall comply with the following:
(1) The rated treatment capacity of an
aerobic treatment tank shall be specified by the manufacturer. The
manufacturer's data shall be in conformance with the approved test sequence and
protocol in subsection (b).
(2) The
minimum manufacturer's rated treatment capacity of an aerobic treatment tank
approved under this section is 400 gpd.
(3) For single family dwelling units not
served by a community system, a minimum daily flow of 400 gpd shall be used to
determine required aerobic tank capacity. This figure shall be increased by 100
gallons for each additional bedroom over three. The daily flow indicated
provides for use of garbage grinders, automatic washing machines, dishwashers
and water softeners.
(4) For all
other installations, the rated treatment capacity shall meet or exceed the
estimated daily sewage flow as determined from §
73.17(a), (b) or
(c) (relating to sewage
flows).
(b) Testing and
approval shall comply with the following:
(1)
Aerobic treatment tanks serving single family dwellings, or establishments,
with flows of 1,500 gpd or less shall bear the seal of the NSF indicating
testing and approval by that agency under Standard No. 40.
(2) Units tested and awarded a seal under
other than the current standard shall be approved for use until expiration of
the seal. Units initially submitted for testing or resubmitted for testing
shall be approved under the version of Standard No. 40 in effect at that
time.
(3) Aerobic treatment tanks
serving establishments with flows exceeding 1,500 gpd shall either:
(i) Have NSF certification under Criteria
C-9.
(ii) Have performance data
certified by NSF under the provisions of that agency's Standard Performance
Evaluation Method.
(c) The Department will provide local
agencies with a current list of aerobic sewage treatment tanks that have been
found to be in conformance with the Department's standard.
(d) Multiple aerobic treatment tanks
connected for the purpose of achieving required hydraulic capacity shall only
be permitted where the tanks are connected in parallel. All tanks shall have
equal capacity and receive equal loading.
(e) Every aerobic sewage treatment tank shall
be equipped with a visual and audible alarm system which shall be designed to
respond to any electrical or mechanical failure or malfunction of the tank or
any component thereof.
Notes
The provisions of this § 73.32 amended under section 9 of the Pennsylvania Sewage Facilities Act (35 P. S. § 750.9); The Clean Streams Law (35 P. S. §§ 691.1-691.1001); and section 1920-A of The Administrative Code of 1929 (71 P. S. § 510-20).
This section cited in 25 Pa. Code § 73.161 (relating to general).
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