Section 170. Operation and maintenance manual

A. This chapter outlines the minimum requirements for operation, maintenance, sampling, and inspection of AOSSs. Operation, maintenance, sampling, and inspection schedules for some AOSSs may exceed these minimum requirements, in which case the designer is responsible for determining such additional requirements based upon the proposed use, design flow, project area, loading rates, nitrogen removal, treatment level, and other factors.

B. Prior to the issuance of an operation permit, the owner shall ensure that an O&M manual is submitted to the local health department for approval.

C. The O&M manual shall be easily understood by any potential owner and shall include the following minimum items:

1. Basic information on the AOSS design including treatment unit capacity, installation depth, pump operating conditions, a list of the components comprising the AOSS, a dimensioned site layout, sampling locations, and contact information for replacement parts for each unit process;

2. A list of any control functions and how to use them;

3. All operation, maintenance, sampling, and inspection schedules for the AOSS, including any requirements that exceed the minimum requirements of this chapter;

4. The performance (laboratory) data sampling and reporting schedule;

5. The limits of the AOSS design and how to operate the system within those design limits;

6. For systems with flows greater than 40,000 GPD, the O&M manual shall include operational and control testing recommendations that shall be based upon 9VAC25-790-970; and

7. Other information deemed necessary or appropriate by the designer.

Historical Notes

Derived from Volume 28, Issue 05, eff. December 7, 2011.

Statutory Authority

§§ 32.1-12 and 32.1-164 of the Code of Virginia.