Current through Register Vol. 24-06, March 15, 2024
(1) CQA program.
(a) A construction quality assurance (CQA)
program is required for all surface impoundment, waste pile, and landfill units
that are required to comply with WAC
173-303-650(2)(j) and
(k),
173-303-660(2)(j) and
(k), and
173-303-665(2)(h) and
(j). The program must ensure that the
constructed unit meets or exceeds all design criteria and specifications in the
permit. The program must be developed and implemented under the direction of a
CQA officer who is a registered professional engineer.
(b) The CQA program must address the
following physical components, where applicable:
(i) Foundations;
(ii) Dikes;
(iii) Low-permeability soil liners;
(iv) Geomembranes (flexible membrane
liners);
(v) Leachate collection
and removal systems and leak detection systems; and
(vi) Final cover systems.
(2) Written CQA plan.
The owner or operator of units subject to the CQA program under (a) of this
subsection must develop and implement a written CQA plan. The plan must
identify steps that will be used to monitor and document the quality of
materials and the condition and manner of their installation. The CQA plan must
include:
(a) Identification of applicable
units, and a description of how they will be constructed.
(b) Identification of key personnel in the
development and implementation of the CQA plan, and CQA officer
qualifications.
(c) A description
of inspection and sampling activities for all unit components identified in
subsection (1)(b) of this section, including observations and tests that will
be used before, during, and after construction to ensure that the construction
materials and the installed unit components meet the design specifications. The
description must cover: Sampling size and locations; frequency of testing; data
evaluation procedures; acceptance and rejection criteria for construction
materials; plans for implementing corrective measures; and data or other
information to be recorded and retained in the operating record under WAC
173-303-380.
(3) Contents of program.
(a) The CQA program must include
observations, inspections, tests, and measurements sufficient to ensure:
(i) Structural stability and integrity of all
components of the unit identified in subsection (1)(b) of this
section;
(ii) Proper construction
of all components of the liners, leachate collection and removal system, leak
detection system, and final cover system, according to permit specifications
and good engineering practices, and proper installation of all components
(e.g., pipes) according to design specifications;
(iii) Conformity of all materials used with
design and other material specifications under WAC
173-303-650,
173-303-660, and
173-303-665.
(b) The CQA program will include test fills
for compacted soil liners, using the same compaction methods as in the full
scale unit, to ensure that the liners are constructed to meet the hydraulic
conductivity requirements of WAC
173-303-650(2)(j)(i)(B),
173-303-660(2)(j)(i)(B),
and 173-303-665(2)(h)(i)(B)
in the field. Compliance with the hydraulic
conductivity requirements must be verified by using in situ testing on the
constructed test fill. The department may accept an alternative demonstration,
in lieu of a test fill, where data are sufficient to show that a constructed
soil liner will meet the hydraulic conductivity requirements of WAC
173-303-650(2)(j)(i)(B),
173-303-660(2)(j)(i)(B),
and 173-303-665(2)(h)(i)(B)
in the field.
(4) Certification. Waste will not be received
in a unit subject to this section until the owner or operator has submitted to
the department by certified mail , hand delivery or other means that establish
proof of receipt (including applicable electronic means), a certification
signed by the CQA officer that the approved CQA plan has been successfully
carried out and that the unit meets the requirements of WAC
173-303-650(2)(j) or
(k),
173-303-660(2)(j) or
(k), or
173-303-665(2)(h) or
(j); and the procedure in WAC
173-303-810(14)(a)
has been completed. Documentation supporting
the CQA officer's certification must be furnished to the department upon
request.
Statutory Authority:
Chapters
70.105 and
70.105D RCW. 95-22-008 (Order
94-30), § 173-303-335, filed 10/19/95, effective
11/19/95.