Engineering Design Manual - Loudoun Water

Chapter 8: Community Wastewater Systems
Chapter 8: Community Wastewater Systems
8.1 Scope
A. Intent
These Community Wastewater System Standards have been authorized by the Statement of
Policy Concerning Community Water and Sewer Systems as adopted by Loudoun Water’s
Board of Directors on December 15, 1989. As such, this document provides requirements
and standards for wastewater systems designed and constructed on behalf of Loudoun Water.
These standards are not intended to be all-inclusive. Loudoun Water will consider
alternative means and methods to accomplish its objectives based upon good engineering
practices and demonstrated technical effectiveness, reliability and cost effectiveness.
B. Standards
The Community Wastewater System Standards presented herein shall supplement the latest
edition of the Sewage Collection and Treatment (SCAT) Regulations 9 VAC 25-790, as
published by the Commonwealth of Virginia, Department of Environmental Quality (DEQ).
The SCAT Regulations represent the minimum design requirements. All requirements of the
SCAT Regulations shall be adhered to. As the owner, Loudoun Water may identify and
determine the need for standards and requirements that are more stringent than those
contained in Part III of the SCAT Regulations.
The headings and sub-headings of this Chapter are based on the SCAT Regulations. In
instances where no additional requirements are specified, the SCAT Regulations shall apply
as written.
If the proposed system uses a soil-based effluent discharge, wastewater infrastructure shall
meet the requirements of the latest edition of the Sewage Handling and Disposal
Regulations 12 VAC 5-610, as published by the Commonwealth of Virginia, Department of
Environmental Quality.
If reuse of reclaimed wastewater is to be practiced at locations other than the wastewater
treatment plant site, the project shall adhere to the Water Reclamation and Reuse
Regulation 9 VAC 25-740-10 et seq.
C. Interpretation
Wastewater infrastructure shall meet the all applicable requirements of this Manual.
Loudoun Water will grant no exceptions to the requirements of these standards, except
where doing so provides a direct benefit to Loudoun Water.
8.2 Requirements Supplemental to SCAT Regulations
A. Definitions
To 9 VAC 25-790-10 add the following:
Engineering Design Manual
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