| (B) Gauges used in the testing of backflow prevention
assemblies shall be tested for accuracy annually in accordance with
the University of Southern California's Manual of Cross-Connection
Control or the AWWA's Recommended Practice for Backflow Prevention
and Cross-Connection Control (AWWA Manual M14). Public water systems
shall require testers to include test gauge serial numbers on the
Backflow Prevention Assembly Test and Maintenance Report (commission
Form 20700), and ensure testers have gauges tested for accuracy.
(C) A test report must be completed by the recognized
backflow prevention assembly tester for each assembly tested. The
signed and dated original must be submitted to the public water supplier
for recordkeeping purposes. Any form which varies from the format
specified in commission Form 20700 must be approved by the executive
director prior to being placed in use.
(5) The use of a backflow prevention assembly at the
service connection shall be considered as additional backflow protection
and shall not negate the use of backflow protection on internal hazards
as outlined and enforced by local plumbing codes.
(6) At any residence or establishment where there is
no actual or potential contamination hazard, a backflow prevention
assembly is not required.
(i) Water hauling. When drinking water is distributed
by tank truck or trailer, it must be accomplished in the following
manner.
(1) Water shall be obtained from an approved source.
(2) The equipment used to haul the water must be approved
by the executive director and must be constructed as follows.
(A) The tank truck or trailer shall be used for transporting
drinking water only and shall be labeled "Drinking Water." Tanks which
have been used previously for purposes other than transporting potable
liquids shall not be used for hauling drinking water.
(B) The tank shall be watertight and of an approved
material which is impervious and easily cleaned and disinfected. Any
paint or coating and any plastic or fiberglass materials used as contact
surfaces must be approved by the United States Environmental Protection
Agency, the United States Food and Drug Administration, or the NSF.
Effective January 1, 1993, any newly installed surfaces shall conform
to ANSI/NSF Standard 61 and must be certified by an organization accredited
by ANSI.
(C) The tank shall have a manhole and a manhole cover
which overlaps the raised manhole opening by a minimum of two inches
and terminates in a downward direction. The cover shall fit firmly
on the manhole opening and shall be kept locked.
(D) The tank shall have a vent which is faced downward
and located to minimize the possibility of drawing contaminants into
the stored water. The vent must be screened with 16-mesh or finer
corrosion-resistant material.
(E) Connections for filling and emptying the tank shall
be properly protected to prevent the possible entrance of contamination.
These openings must be provided with caps and keeper chains.
(F) A drain shall be provided which will completely
empty the tank for cleaning or repairs.
(G) When a pump is used to transfer the water from
the tank, the pump shall be permanently mounted with a permanent connection
to the tank. The discharge side of the pump shall be properly protected
between uses by a protective cap and keeper chain.
(H) Hoses used for the transfer of drinking water to
and from the tank shall be used only for that purpose and labeled
for drinking water only. The hoses shall conform to ANSI/NSF Standard
61 and must be certified by an entity recognized by the commission.
Hoses and related appurtenances must be cleaned and disinfected on
a regular basis during prolonged use or before start-up during intermittent
use. Hoses must be properly stored between uses and must be provided
with caps and keeper chains or have the ends connected together.
(I) The tank shall be disinfected monthly and at any
time that contamination is suspected.
(J) At least one sample per month from each tank shall
be collected and submitted for microbiological analysis to one of
the commission's approved laboratories for each month of operation.
(K) A minimum free chlorine residual of 0.5 milligrams
per liter (mg/L) or, if chloramines are used as the primary disinfectant,
a chloramine residual of 1.0 mg/L (measured as total chlorine) shall
be maintained in the water being hauled. Chlorine or chlorine containing
compounds may be added on a "batch" basis to maintain the required
residual.
(L) Operational records detailing the amount of water
hauled, purchases, microbiological sampling results, chlorine residual
readings, dates of disinfection, and source of water shall be maintained.
(j) If a structure is connected to a public water supply
system and has a rainwater harvesting system, the structure must have
appropriate cross-connection safeguards in accordance with subsection
(h)(1) of this section.
(1) A privately owned rainwater harvesting system with
a capacity of more than 500 gallons that is connected to a public
water system for a back-up supply shall have a backflow prevention
assembly or an air gap installed at the storage facility for the harvested
rainwater to ensure physical separation between the rainwater harvesting
system and the public water system.
(2) At each residence or facility where water from
a rainwater harvesting system is used for potable purposes and there
is a connection to a public water system, the public water system
shall ensure that the rainwater harvesting system is installed and
maintained by a master plumber or journeyman plumber licensed by the
Texas State Board of Plumbing Examiners and who holds an endorsement
issued by the Texas State Board of Plumbing Examiners as a Water Supply
Protection Specialist.
(3) A person who intends to connect a rainwater harvesting
system to a public water system must give written notice of that intention
to the municipality or the owner or operator of the public water system
in which the rainwater harvesting system is located.
(4) The public water system used as a back-up supply
for the rainwater harvesting system may be connected only to the water
storage tank and may not be connected to the plumbing of a structure.
|
| Source Note: The provisions of this §290.44 adopted to be effective October 1, 1992, 17 TexReg 6455; amended to be effective November 3, 1995, 20 TexReg 8620; amended to be effective March 3, 1997, 22 TexReg 1809; amended to be effective February 4, 1999, 24 TexReg 731; amended to be effective September 13, 2000, 25 TexReg 8880; amended to be effective May 16, 2002, 27 TexReg 4127; amended to be effective February 19, 2004, 29 TexReg 1373; amended to be effective January 9, 2008, 33 TexReg 198; amended to be effective October 16, 2008, 33 TexReg 8533; amended to be effective December 10, 2009, 34 TexReg 8744; amended to be effectiveSeptember 12, 2013, 38 TexReg 5880; amended to be effective February 20, 2014, 39 TexReg 994; amended to be effective July 30, 2015, 40 TexReg 4769 |
