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Food service must install a ___ in plumbing prior to toilet wastes to collect grease.

Effluent pump systems have water level controls which are typically maintained by a mercury float switch or similar device.

When using plants over an absorption field you should consider all of the following EXCEPT:

As part of an ATU, the clarification chamber aerates the influent wastewater for aerobic bacterial growth.

A ___ determines the unconfined compressive strength of soil in tsf (tons per square foot).

The minimum fall in pipe elevation from the house to the septic tank is ___ or ___ of pipe.

One way to maximize the nutrients removed from a site is to harvest wetland plants several times during the growing season.

If there is surfacing sewage at the septic tank:

Benching is allowed in Type C soils.

OSHA excavation standards require an employer to have a competent person to classify soil and rock deposits.