Comment Period on Webb Hill Lagoon Extended

The SEPA Comment period for Bio Recycling Corporation’s land modification (grading) permit to construct a 18-million-gallon storage lagoon at their North Ranch facility on Webb Hill has been extended to April 22, 2018. This is the second extension of the comment period and was granted without objection by Bio Recycling. Comments can be emailed: or mailed: 615 W. Alder St.; Shelton, WA 98584.

According to Kell Rowen, Senior Planner for Mason County’s Community Services, the proposed storage lagoon (or surface impoundment facility) is not an expansion of the existing facility. Rather the proposed lagoon is a mitigation measure to decrease the nitrate levels found in the monitoring wells. The SEPA Determination is given for the proposal to construct the lagoon, not for the facility and land application. That was done by Ecology in 2015 under their bio solids general permit, which led to the mitigation requirement.

The construction of the lagoon involves the grading of 49,000 cubic yards. Any grading project over 500 cubic yards requires the submittal of a SEPA checklist. Mason County, Acting as co-lead agency with the State Department of Ecology, issued a Determination of Non Significant (DNS).

Bio Recycling has been permitted under their Bio Solids General Permit from Ecology to continue accepting septage year-round for treatment. They are permitted to spray the treated wastewater year-round, including this winter, until October 2018. Beginning October 2018, Bio Recycling will be required to stop land-applying through March. The proposal is to store the treated waste water in the storage lagoon until they can spray April through September. This allows them to continue accepting septage for treatment in the winter without spraying when the 300 acres of hay and alfalfa fields are dormant.

Monday, the Mason County Commission was briefed on the Webb Hill project. Click here for the video of the briefing.

During Tuesday’s Mason County Commission meeting, each commissioner commented on the project:


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