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PA Bulletin, Doc. No. 22-1700



Availability of Technical Guidance

[52 Pa.B. 6932]
[Saturday, November 5, 2022]

 Technical guidance documents (TGD) are available on the Department of Environmental Protection's (Department) web site at The ''Technical Guidance Final Documents'' heading is the link to a menu of the various Department bureaus where each bureau's final TGDs are posted. The ''Technical Guidance Draft Documents'' heading is the link to the Department's draft TGDs.

Ordering Paper Copies of Department Technical Guidance

 The Department encourages the use of the Internet to view and download TGDs. When this option is not available, persons can order a paper copy of any of the Department's draft or final TGDs by contacting the Department at (717) 783-8727.

 In addition, bound copies of some of the Department's documents are available as Department publications. Check with the appropriate bureau for more information about the availability of a particular document as a publication.

Changes to TGDs

 Following is the current list of recent changes. Persons who have questions or comments about a particular document should contact the person whose name and phone number are listed with each document.

Draft TGD: Substantive Revision

DEP ID: 381-2188-005. Title: Small Flow Treatment Facility Manual. Description: The purpose of this document is to provide guidance regarding the design, permitting, installation, operation and maintenance of domestic wastewater treatment facilities with flows not greater than 2,000 gallons per day.

 The manual has not been revised since 2006. The manual has been updated, including:

 • Added definitions—existing manual had no section containing definitions.

 • Added organic design criteria—existing manual was based on hydraulic loading only.

 • Added section on pretreatment for food preparation facilities—oil and grease from restaurants can cause problems with small flow systems unless it is removed prior to entering the system.

 • Added specifications for trenching, bedding, haunching and initial backfill, final backfill, deflection testing and joints.

 • Revised sand specifications—existing sand specifications were based on the Department of Transportation (PennDOT) sand, which is nonuniform and packs densely with a minimum of air space. This makes for good concrete but is the opposite of the sand desired for sand filters. In addition, some of the sand that was specified in the existing manual has been discontinued and is no longer available making compliance with the manual impossible. Furthermore, the ranges of materials (such as sand) specified in the existing manual were excessively broad. The revisions tighten the standards so that they reflect materials that will perform satisfactorily. Finally, the revisions require the design engineer to perform an analysis of the material and show that it will be expected to continuously meet effluent limits.

 • Deleted the CO-OP RFS III recirculating sand filter.

 • Added section allowing the use of proprietary technologies that have been evaluated and approved by the Bureau of Clean Water. It has been determined that several technologies are capable of meeting the specified effluent limits, with greater than 85% certainty. The revisions to this manual incorporate these technologies by reference into the manual.

 • Revised dosing frequencies—provided for improved system performance.

 • Added operation and maintenance requirements for sand filters and chlorine disinfection.

 • Added PennDOT specifications for coarse aggregate—eliminates the need to consult multiple documents in the design process.

Written Comments: Interested persons may submit written comments on this draft TGD through Tuesday, January 3, 2023. Comments, including comments submitted by e-mail must include the commentator's name and address. Commentators are encouraged to submit comments using the Department's online eComment tool at Written comments can also be submitted by e-mail to or by mail to the Technical Guidance Coordinator, Department of Environmental Protection, Policy Office, Rachel Carson State Office Building, P.O. Box 2063, Harrisburg, PA 17105-2063.

Contact: Questions regarding this TGD can be directed to Jay Patel at or (717) 787-5017.

Effective Date: Upon publication of notice as final in the Pennsylvania Bulletin.

Acting Secretary

[Pa.B. Doc. No. 22-1700. Filed for public inspection November 4, 2022, 9:00 a.m.]

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