pa-56-36-1293: Update to onlot alternate technology for leaching chambers

Summary

The Department of Environmental Protection (Department) has updated the onlot alternate technology (OAT) listing for specific leaching chamber products. Leaching chambers provide an alternate method of distribution of wastewater effluent onto an absorption area. Leaching chambers can be used as a substitute for aggregate in many types of onlot systems. The previous classification listing, Alternate Technology # A2014-0016-0002, included the use of the Quick 4 chambers from Infiltrator Water Technologies (Infiltrator). Infiltrator has developed a new product, the Quick 5 Standard, and Infiltrator has requested approval from the Department for use in this Commonwealth as an onlot alternate technology. The Quick 5 chambers are 1 foot longer than the Quick 4 chambers. Other changes in the updated alternate listing include providing infiltrative credit for end cap units consistent with the Infiltrator product manual, clarifying the chambers do not provide treatment of effluent, updating listing specifications to be consistent with the Infiltrator product manual, and additional grammatical and clarifying edits. The Department published notice of the draft updated listing at 56 Pa.B. 3095 (May 23, 2026) with a 30-day public comment period. The Department received no comments and has finalized the listing with no changes compared with the updated draft. The updated OAT listing is available on the Department's website at...

The agency’s own summary, as published.