Use of registered or accredited laboratories:

(1) Except as established in subsection (3) of this section, monitoring data submitted to the department in accordance with this chapter shall be prepared by a laboratory accredited under the provisions of chapter 173-50 WAC no later than July 1, 1993, for all state permittees with a permitted average flow rate greater than five million gallons per day.

These requirements are effective and binding on all permittees under the authority of rule, regardless of whether they have been included as conditions of a permit.

(2) Except as established in subsection (3) of this section, monitoring data submitted to the department in accordance with this chapter shall be prepared by a laboratory registered or accredited under the provisions of chapter 173-50 WAC no later than July 1, 1994, for all state permittees not covered under subsection (1) of this section.

These requirements are effective and binding on all permittees under the authority of rule, regardless of whether they have been included as conditions of a permit.

(3) The following parameters need not be accredited or registered:

(a) Flow;

(b) Temperature;

(c) Settleable solids;

(d) Conductivity, except that conductivity shall be accredited if the laboratory must otherwise be registered or accredited;

(e) pH, except that pH shall be accredited if the laboratory must otherwise be registered or accredited;

(f) Turbidity, except that turbidity shall be accredited if the laboratory must otherwise be registered or accredited; and

(g) Parameters which are used solely for internal process control.