NSF P331

NSF Protocol 331 - In-Situ Volume Measurement of On-Site Wastewater Treatment System Drainfield Products NSF International / 25-Jan-2006 / 23 pages

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This protocol establishes standard procedures for the measurement of the volume under in-situ conditions for the following onsite wastewater treatment system drainfield products: conventional natural aggregate (e.g. crushed rock or stone) and pipe, molded plastic chambers, and large diameter plastic pipe and geotextile composite products.