Virginia Administrative Code › Title 9 - ENVIRONMENT › Agency 25 - STATE WATER CONTROL BOARD › Chapter 790 - VIRGINIA POLLUTANT DISCHARGE ELIMINATION SYSTEM (VPDES) PERMIT REGULATION › Part II - Operational Regulations › Article 3 - Requirements for Sewerage Systems and Treatment Works Reliability › Section 9VAC25-790-300 - Reliability

Current through Register Vol. 40, No. 24, July 15, 2024
A. Additional
					 operation and maintenance documentation may be necessary where performance
					 reliability has not been established or worker safety and public health
					 protection is questioned.
B.
					 Operability. Independently operated essential equipment or components of
					 sewerage systems and treatment works shall be provided with sufficient
					 duplication or alternative operation so that the average daily design flow may
					 be transported, stored, treated or otherwise managed in accordance with
					 reliability requirements with the largest component out of service. Sufficient
					 spare parts to ensure continuous operability of essential unit operations and
					 equipment shall be kept in a central storeroom located at the treatment works
					 or at other readily accessible locations, and the minimum quantities shall be
					 in accordance with the operation and maintenance manual. The need for spare
					 parts should be determined from review of manufacturer's recommendations,
					 evaluation of past maintenance requirements, etc. A spare parts inventory shall
					 be included in the operation and maintenance manual. The inventory shall list
					 the minimum and maximum quantities of the spare parts to be kept on hand, the
					 equipment in which they are used, their storage location, replacement
					 procedures and other pertinent information. A suggested spare parts inventory
					 system is contained in Part IV (9VAC25-790-940 et
					 seq.) of this chapter.
C.
					 Maintenance. A regular program of preventive maintenance shall be adhered to.
					 The Operations and Maintenance Manual shall contain a system of maintenance
					 requirements to be accomplished.
1. A minimum
					 preventive maintenance system shall be provided in accordance with the
					 Operations and Maintenance Manual. Such a system should provide for advanced
					 scheduling of preventive maintenance and should be continually assessed in
					 order to reflect increased service requirements as equipment ages or flow rates
					 increase.
2. Adequate records,
					 files and inventories to assist the operator in his task should also be
					 maintained.
3. A schedule for
					 testing the integrity of all auxiliary standby power equipment, portable pumps,
					 automatic electrical switchover gear, and diversion piping should be developed
					 and adhered to on a regular basis. A suggested maintenance system is outlined
					 in this chapter. In cases where certain components of the treatment process may
					 be damaged by flooding from natural events in such a manner as to cause
					 excessive delays in restoring the treatment process to the design operating
					 level, the means of removal of such components prior to flooding should be
					 described in the Operational and Maintenance Manual.