| normal operations
(for example, while checking service line materials when reading water
meters or performing maintenance activities). Sources of information
that must be reviewed include:
(I) all plumbing codes, permits, and records in the
files of the building department(s) which indicate the plumbing materials
that are installed within publicly and privately owned structures
connected to the distribution system;
(II) all inspections and records of the distribution
system that indicate the material composition of the service connections
that connect a structure to the distribution system;
(III) all existing water quality information, which
includes the results of all prior analyses of the system or individual
structures connected to the system, indicating locations that may
be particularly susceptible to high lead or copper concentrations;
and
(IV) a water system shall use the information on lead,
copper, and galvanized steel that it is required to collect when performing
a corrosion control study that is required under subsection (f) of
this section.
(ii) Sample site selection form. After completing sample
site selection, the system will submit the Lead and Copper Sample
Site Selection form (TCEQ Form Number 20467) to the executive director
for approval. Systems shall identify routine and reduced monitoring
sites on their Lead and Copper Sample Site Selection form.
(I) Selecting tier 1, 2, and 3 sites. Systems shall
identify tier 1, tier 2, and tier 3 sites as described in subparagraph
(D) of this paragraph.
(II) Sites for community systems with insufficient
tier 1, 2, or 3 sites. A community water system with insufficient
tier 1, tier 2, and tier 3 sampling sites shall complete its sampling
pool with representative sites throughout the distribution system.
(III) Sites for nontransient, noncommunity systems
with insufficient tier 1, 2, or 3 sites. A nontransient, noncommunity
water system with insufficient tier 1 sites shall complete its sampling
pool with sampling sites that contain copper pipes with lead solder
installed before 1983. If additional sites are needed to complete
the sampling pool, the nontransient, noncommunity water system shall
use representative sites throughout the distribution system.
(IV) Sites for systems with lead service lines. Any
water system whose distribution system contains lead service lines
shall draw 50% of the samples it collects during each monitoring period
from sites that contain lead pipes, or copper pipes with lead solder,
and 50% of the samples from sites served by a lead service line. A
water system that cannot identify a sufficient number of sampling
sites served by a lead service line shall collect first-draw samples
from all of the sites identified as being served by such lines.
(V) Supplemental information with Site Selection Form.
Systems shall submit supplemental explanatory information as part
of the sample site selection documentation.
(D) Tier 1, 2, and 3 sites. Tier 1, 2, and 3 sites
representing potential for leaching lead or copper under corrosive
conditions shall be defined as described in this subparagraph.
(i) Definition of community tier 1. The sampling sites
selected for a community water system's sampling pool, called "tier
l sampling sites," shall consist of single family structures that:
(I) contain copper pipes with lead solder installed
after 1982 or contain lead pipes; or
(II) are served by a lead service line. When multiple-family
residences comprise at least 20% of the structures served by a water
system, the system may include these types of structures in its sampling
pool.
(ii) Definition of community tier 2. Any community
water system with insufficient tier 1 sampling sites shall complete
its sampling pool with "tier 2 sampling sites", consisting of buildings,
including multiple-family residences that:
(I) contain copper pipes with lead solder installed
after 1982 or contain lead pipes; or
(II) are served by a lead service line.
(iii) Definition of community tier 3. Any community
water system with insufficient tier 1 and tier 2 sampling sites shall
complete its sampling pool with tier 3 sampling sites consisting of
single family structures that contain copper pipes with lead solder
installed before 1983.
(iv) Definition of community "other representative
sites". A representative site is a site in which the plumbing materials
used at that site would commonly be found at other sites served by
the water system.
(v) Definition of nontransient, noncommunity tier 1
sites. Tier 1 sampling sites selected for a nontransient, noncommunity
water system shall consist of buildings that:
(I) contain copper pipes with lead solder installed
after 1982 or contain lead pipes; or
(II) are served by a lead service line.
(vi) Nontransient, noncommunity representative sites.
For the purpose of this paragraph, a representative site is a site
in which the plumbing materials used at that site would be commonly
found at other sites served by the water system.
(E) Sites for systems missing first-draw sites. A water
system may request approval of non-first-draw sample sites if it meets
the requirements in this paragraph. The executive director will use
all written documentation provided by the system in reviewing the
request.
(i) Type of system for non-first-draw sites. In order
to request use of non-first-draw sites, the system must be either
a nontransient, noncommunity system, or a community system where:
(I) the system is a facility, such as a prison or a
hospital, where the population served is not capable of or is prevented
from making improvements to plumbing or installing point of use treatment
devices; and
(II) the system provides water as part of the cost
of services provided and does not separately charge for water consumption.
(ii) The request for approval of non-first-draw sites
must provide written documentation identifying standing times and
locations for enough non-first-draw samples to make up its sampling
pool. A system must update their sample sites when system conditions
changes, such as changes in population and destruction of previously
used sites.
(F) Sites for systems with less than five taps. A public
water system that has fewer than five drinking water taps that can
be used for human consumption may request a five-tap waiver to collect
samples at fewer than five locations. The executive director may allow
these public water systems to collect a number of samples less than
the number of sites specified in paragraph (1) of this subsection,
provided that all taps that can be used for human consumption are
sampled. The system must request this reduction of the minimum number
of sample sites in writing based on a request from the system or on-site
verification. In no case can the system reduce the number of samples
required below the minimum of one sample per available tap.
(G) Use of same taps each round. A water system must
collect tap samples from the same sampling sites in each sampling
round.
(i) If a water system changes a sampling site for any
reason allowed in this section, the water system must provide the
executive director with a written explanation showing which sampling
site will be abandoned and the sampling site that replaces the abandoned
sampling site. The water system's report shall include an explanation
as to why a sampling site was changed from the previous round of sampling.
(ii) If a water system cannot collect a sample from
a previously used site, the water system shall provide a written explanation
to the executive director. The water system must select an alternate
sampling site from the system's sampling pool which meets similar
criteria and is within reasonable proximity to the original sampling
site.
(2) Lead and copper tap sampling frequency. Water systems
shall collect at least one sample from the number of sites listed
in the table in paragraph (1) of this subsection during each monitoring
period. Systems shall sample on the schedule determined by the executive
director.
(A) Initial and routine tap sampling. New systems,
systems that exceed any action level, systems that install corrosion
control treatment, systems that exceed a reduced monitoring level,
and systems that operate outside an approved OWQP range shall collect
tap samples in two consecutive six-month monitoring periods at the
initial/routine number of sample sites.
(i) Initial tap sampling. New systems shall collect
tap samples in two consecutive six-month monitoring periods at the
initial/routine number of sample sites. A new community or nontransient,
noncommunity water system begins the first six-month initial monitoring
period in the year after it becomes active. Initial tap sampling shall
be conducted after the executive director has determined that a system
has had sample sites approved based on the materials survey and sample
site selection form required by subsection (b)(2) of this section.
Cont'd... |
