Guidelines for Small Flow Sewage Treatment …

1 362-0300-002 8/983620-BK-DEP1624 Rev. 8/98(Formerly 3640-BK-DER1624) Guidelines FOR DESIGNINSTALLATION & OPERATIONOFSMALL FLOW Sewage Treatment FACILITIESD epartment of Environmental ProtectionBureau of Water Quality ProtectionAn Equal Opportunity EmployerThis manual and related environmentalinformation are available electronically viainternet. For more information, visit us throughthe Pennsylvania homepage at visit DEP directly at (choose Subjects/Water Management/WaterQuality Protection/Wastewater Management).

2 362-0300-002 / August 1998 / Table of Contents / Page iTABLE OF CONTENTS for Sewage Tank(s).. Treatment Sand and and Reporting Design Annual Report Report of DEP / August 1998 / / Page iiCommonwealth of PennsylvaniaDepartment of Environmental ProtectionSMALL flows facilities DESIGN MANUALThe attached Small flows facilities Design Manual has been prepared as a guide for persons responsible forthe design, installation and operator of Small flows Sewage Treatment (<2000 gpd) of facilities .

3 The manual isalso available to download from the DEP web site at: manual may be revised from time to time as the need arises. If you have suggestions for improvement tothis manual or desire that future revisions be sent to you, please return this letter to us with the followingcompleted this request made: Name Street or Route City

4 State Zip Code Telephone E-mail This manual could be improved by

5 Yes, send me future revisions to the manualYes, please notify me of any revisions for downloading from DEP web to:Chief, Permits SectionPennsylvania Department of Environmental ProtectionBureau of Water Quality ProtectionRCSOB 11th Box 8774 Harrisburg, PA 17105-8774362-0300-002 / August 1998 / Page1 DEPARTMENT OF ENVIRONMENTAL PROTECTIONBUREAU OF WATER QUALITY PROTECTIOND ocument ID:362-0300-002 Title: Small Flow Sewage Treatment Facility ManualEffective Date:February 1, 1998 AuthorityAct 537 of 1966, the Pennsylvania Sewage facilities Act (as amended), and the Clean Streams Law ( ) 25 PA Code Chapter :To improve and preserve the purity of the waters of the Commonwealth for the protection of public health,animal and aquatic life and for :To amend and clarify the existing 8/91 guidance regarding the design and construction of domesticwastewater Treatment .

6 This policy provides minor amendments to the 1/1/92 guidance regarding the design and construction ofsmall flow Treatment :The policies and procedures outlined in this guidance are intended to supplement existing in the policies or procedures shall affect regulatory policies and procedures herein are not an adjudication or a regulation. There is no intent on the partof DEP to give the rules in these policies that weight or deference. This document establishes theframework within which DEP will exercise its administrative discretion in the future.

7 DEP reserves thediscretion to deviate from this policy statement if circumstances Length:37 PagesLocation:Vol. 33, Tab 24 Definitions:Sewerage System: A system of Sewage collection, conveyance, Treatment and disposal which willprevent the discharge of untreated or inadequately treated Sewage or other wastes into waters of theCommonwealth or otherwise provide for the safe and sanitary Treatment and disposal of Flow Treatment Facility: An individual or community sewerage system designed to adequatelytreat Sewage flows not greater than 2,000 / August 1998 / Page purpose of this Manual is to provide Guidelines for the design, installation and operation of Small Flow SewageTreatment facilities (SFSTF).

8 These facilities are intended to serve single family residences, duplexes and smallcommercial establishments with domestic type Sewage (BOD consistent with Appendix A) not exceeding2000 gallons per day. For new building sites Small flow Sewage Treatment facilities are used to serve residentialdwellings only if on-lot systems cannot be used (See 25 Pa. Code, Chapter 71, Section ). For smallcommercial establishments with domestic type Sewage they may also be used only to repair or replacemalfunctioning systems.

9 Small flow Treatment facilities must be capable of producing an effluent suitable fordischarge without violating NPDES permit limits or polluting groundwaters of the Commonwealth. They may not beused to discharge to any stream which is rated as Exceptional Value under Chapter 93 and may only discharge toHigh Quality Streams when used to repair a malfunctioning treated Sewage from a Small flow Treatment facility may be discharged to a stream, dry stream, or applied toland by spray irrigation. A number of Sewage disposal alternatives for Small flow situations exist and should beevaluated in the following order of to a public sewer disposal facility with spray facility with stream facility with dry stream flow Treatment facilities may only be used when on-lot disposal systems do not and cannot be expected tofunction satisfactorily because of soil, geologic and groundwater in the form of a permit (or permits where discharge to surface waters is involved)

10 Must be obtained fromthe Department prior to construction. Before any permits are issued Sewage planning approval is also manual will assist you in preparing the necessary information for your submission(s) to the Regional Office ofthe Department which serves the County in which the project is located. Department staff is available to assist youshould any questions YOU DECIDE TO PURSUE INSTALLATION OF A Small FLOW Sewage TREATMENTFACILITY, YOU SHOULD KNOW THAT THE APPROVAL PROCESS IS VERY TIMECONSUMING.