| (i) a well capacity of 0.6 gpm per connection. Systems
with 250 or more connections must have either two wells or an approved
interconnection which is capable of supplying at least 0.35 gpm for
each connection in the combined system;
(ii) a total storage of 200 gallons per connection;
(iii) at least two service pumps with a total capacity
of 2.0 gpm per connection; and
(iv) a pressure tank capacity of 20 gallons per connection.
(2) Surface water supplies must meet the following
requirements:
(A) a raw water pump capacity of 0.6 gpm per connection
with the largest pump out of service;
(B) a treatment plant capacity of 0.6 gpm per connection
under normal rated design flow;
(C) transfer pumps (where applicable) with a capacity
of 0.6 gpm per connection with the largest pump out of service;
(D) a covered clearwell storage capacity at the treatment
plant of 50 gallons per connection or, for systems serving more than
250 connections, 5.0% of daily plant capacity;
(E) a total storage capacity of 200 gallons per connection;
(F) a service pump capacity that provides each pump
station or pressure plane with two or more pumps that have a total
capacity of 2.0 gpm per connection or that have a total capacity of
at least 1,000 gpm and the ability to meet peak hourly demands with
the largest pump out of service, whichever is less. For systems which
provide an elevated storage capacity of 200 gallons per connection,
two service pumps with a minimum combined capacity of 0.6 gpm per
connection are required at each pump station or pressure plane;
(G) an elevated storage capacity of 100 gallons per
connection or a pressure tank capacity of 20 gallons per connection.
If pressure tanks are used, a maximum capacity of 30,000 gallons is
sufficient for systems of up to 2,500 connections. An elevated storage
capacity of 100 gallons per connection is required for systems with
more than 2,500 connections. Alternate methods of pressure maintenance
may be proposed and will be approved if the criteria contained in
subsection (g)(5) of this section are met; and
(H) emergency power for systems which serve more than
250 connections and do not meet the elevated storage requirement.
Sufficient emergency power must be provided to deliver a minimum of
0.35 gpm per connection and meet minimum pressure requirements to
the distribution system in the event of the loss of normal power supply.
Alternately, an emergency interconnection can be provided with another
public water system that has emergency power and is able to supply
at least 0.35 gpm for each connection in the combined system. Emergency
power must be maintained as required by §290.46(m)(8) of this
title.
(3) Any community public water system that is an affected
utility, defined in TWC §13.1394 or §13.1395 shall have
an emergency preparedness plan approved by the executive director
and must meet the requirements for emergency operations contained
in subsection (h) or (i) of this section. This includes any affected
utility that provides 100 gallons of elevated storage capacity per
connection.
(c) Noncommunity water systems serving transient accommodation
units. The following water capacity requirements apply to noncommunity
water systems serving accommodation units such as hotel rooms, motel
rooms, travel trailer spaces, campsites, and similar accommodations.
(1) Groundwater supplies must meet the following requirements.
(A) If fewer than 100 accommodation units without ground
storage, the system must meet the following requirements:
(i) a well capacity of 1.0 gpm per unit; and
(ii) a pressure tank capacity of ten gallons per unit
with a minimum of 220 gallons.
(B) For systems serving fewer than 100 accommodation
units with ground storage or serving 100 or more accommodation units,
the system must meet the following requirements:
(i) a well capacity of 0.6 gpm per unit;
(ii) a ground storage capacity of 35 gallons per unit;
(iii) two or more service pumps which have a total
capacity of 1.0 gpm per unit; and
(iv) a pressure tank capacity of ten gallons per unit.
(2) Surface water supplies, regardless of size, must
meet the following requirements:
(A) a raw water pump capacity of 0.6 gpm per unit with
the largest pump out of service;
(B) a treatment plant capacity of 0.6 gpm per unit;
(C) a transfer pump capacity (where applicable) of
0.6 gpm per unit with the largest pump out of service;
(D) a ground storage capacity of 35 gallons per unit
with a minimum of 1,000 gallons as clearwell capacity;
(E) two or more service pumps with a total capacity
of 1.0 gpm per unit; and
(F) a pressure tank capacity of ten gallons per unit
with a minimum requirement of 220 gallons.
(3) A noncommunity public water system that is an affected
utility, defined in TWC §13.1394 or §13.1395 shall meet
the requirements of subsection (h) or (i) of this section.
(d) Noncommunity water systems serving other than transient
accommodation units.
(1) The following table is applicable to paragraphs
(2) and (3) of this subsection and shall be used to determine the
maximum daily demand for the various types of facilities listed.
Attached Graphic
(2) Groundwater supplies must meet the following requirements.
(A) Subject to the requirements of subparagraph (B)
of this paragraph, if fewer than 300 persons per day are served, the
system must meet the following requirements:
(i) a well capacity which meets or exceeds the maximum
daily demand of the system during the hours of operation; and
(ii) a minimum pressure tank capacity of 220 gallons
with additional capacity, if necessary, based on a sanitary survey
conducted by the executive director.
(B) Systems which serve 300 or more persons per day
or serve fewer than 300 persons per day and provide ground storage
must meet the following requirements:
(i) a well capacity which meets or exceeds the maximum
daily demand;
(ii) a ground storage capacity which is equal to 50%
of the maximum daily demand;
(iii) if the maximum daily demand is less than 15 gpm,
at least one service pump with a capacity of three times the maximum
daily demand;
(iv) if the maximum daily demand is 15 gpm or more,
at least two service pumps with a total capacity of three times the
maximum daily demand; and
(v) a minimum pressure tank capacity of 220 gallons
with additional capacity, if necessary, based on a sanitary survey
conducted by the executive director.
(3) Each surface water supply or groundwater supply
that is under the direct influence of surface water, regardless of
size, must meet the following requirements:
(A) a raw water pump capacity which meets or exceeds
the maximum daily demand of the system with the largest pump out of
service;
(B) a treatment plant capacity which meets or exceeds
the system's maximum daily demand;
(C) a transfer pump capacity (where applicable) sufficient
to meet the maximum daily demand with the largest pump out of service;
(D) a clearwell capacity which is equal to 50% of the
maximum daily demand;
(E) two or more service pumps with a total capacity
of three times the maximum daily demand; and
(F) a minimum pressure tank capacity of 220 gallons
with additional capacity, if necessary, based on a sanitary survey
conducted by the executive director.
(4) A noncommunity public water system that is an affected
utility, defined in TWC §13.1394 or §13.1395, shall meet
the requirements of subsection (h) or (i) of this section.
(e) Water wholesalers. The following additional requirements
apply to systems which supply wholesale treated water to other public
water supplies.
(1) All wholesalers must provide enough production,
treatment, and service pumping capacity to meet or exceed the combined
maximum daily commitments specified in their various contractual obligations.
If a contract prohibits a purchaser from securing water from sources
other than the contracted wholesaler during emergency operations,
the wholesaler is responsible for meeting applicable capacity requirements.
Cont'd... |
