WAC 246-291-120   Design report approval.  (1) Design reports shall be submitted to the department for written approval prior to installation of any new water system, or water system extension or improvement with the following exceptions:

     (a) Installation of valves, fittings, and meters;

     (b) Repair of a system component or replacement with a similar component of the same capacity; and

     (c) Maintenance or painting of surfaces not contacting potable water.

     (2) Design reports submitted for approval by owners of systems required to have a water system plan, will not be considered for approval unless there is a current approved water system plan and the plan adequately addresses the project.

     (3) Design reports shall include, at a minimum, the following:

     (a) Alternatives. Verify contacts with other water system owners as applicable in accordance with WAC 246-291-140(2);

     (b) Legal considerations. Identify legal aspects such as ownership, right of way, sanitary control area, and restrictive covenants;

     (c) Engineering calculations. Describe how the project complies with the design considerations;

     (d) Drawings. Include detailed drawings of each project component;

     (e) Material specifications. List detailed material specifications for each project component;

     (f) Construction specifications. List detailed construction specifications and assembly techniques for carrying out the project;

     (g) Testing. Identify testing criteria and procedures for each applicable portion of the project;

     (h) Disinfection. Identify specific disinfection procedures which must conform with American Water Works Association standards or other standards acceptable by the department;

     (i) Inspection. Identify provisions for inspection of the installation of each project component. See WAC 246-291-040 for construction reporting requirements; and

     (j) Change orders. All changes except for minor field revisions must be submitted to and approved by the department in writing.

     (4) Approval of design reports shall be in effect for two years unless the department determines a need to withdraw the approval. An extension of the approval may be obtained by submitting a status report and a written schedule for completion. Extensions may be subject to additional terms and conditions imposed by the department.



[Statutory Authority: RCW 43.20.050. 94-14-002, § 246-291-120, filed 6/22/94, effective 7/23/94.]