TEXAS SITE EVALUATOR AND SOIL
EVALUATION FOR OSSFS WITH
CORRECT SOLUTIONS
What is required for a Site Evaluator to possess? - ANSWER-A current license from
TCEQ.
What must a Site Evaluator record on all site evaluations and documents? -
ANSWER-Their license number.
What type of evaluations must a Site Evaluator conduct? - ANSWER-Pre-
construction site evaluations, including soil analysis and site surveys.
What is the minimum lot size for platted or unplanted subdivisions on public water? -
ANSWER-1/2-acre lot.
What is the minimum lot size for platted or unplanted subdivisions on well water? -
ANSWER-1-acre lot.
What is the minimum required separation distance between a public water supply
well and onsite sewage disposal areas? - ANSWER-150 feet.
What is the minimum separation distance for an OSSF system using spray
application to property lines? - ANSWER-20 feet, or 10 feet if a commercial timer
controls sprinkler operation.
What is a Restrictive Horizon in soil analysis? - ANSWER-An abrupt change in
texture from sandy or loamy surface horizon to clayey subsoil or rock-like material
that an auger cannot penetrate.
What soil classes are suitable for a standard absorptive drainfield under Texas
OSSF rules? - ANSWER-Soil classes 1b, II, and III.
What slope percentage is suitable for standard subsurface disposal? - ANSWER-
Less than 30%.
What must be done if groundwater is found within 24 inches of the excavation? -
ANSWER-The soil profile must be examined for indications of groundwater.
What is the purpose of the site evaluation? - ANSWER-To document soil and site
conditions, determine acceptable waste treatment options, and assist in sizing and
locating treatment facilities.
What types of systems are Class IV soils suitable for? - ANSWER-Pumped effluent
drainfields, unlined ET, drip irrigation, and LPD.
EVALUATION FOR OSSFS WITH
CORRECT SOLUTIONS
What is required for a Site Evaluator to possess? - ANSWER-A current license from
TCEQ.
What must a Site Evaluator record on all site evaluations and documents? -
ANSWER-Their license number.
What type of evaluations must a Site Evaluator conduct? - ANSWER-Pre-
construction site evaluations, including soil analysis and site surveys.
What is the minimum lot size for platted or unplanted subdivisions on public water? -
ANSWER-1/2-acre lot.
What is the minimum lot size for platted or unplanted subdivisions on well water? -
ANSWER-1-acre lot.
What is the minimum required separation distance between a public water supply
well and onsite sewage disposal areas? - ANSWER-150 feet.
What is the minimum separation distance for an OSSF system using spray
application to property lines? - ANSWER-20 feet, or 10 feet if a commercial timer
controls sprinkler operation.
What is a Restrictive Horizon in soil analysis? - ANSWER-An abrupt change in
texture from sandy or loamy surface horizon to clayey subsoil or rock-like material
that an auger cannot penetrate.
What soil classes are suitable for a standard absorptive drainfield under Texas
OSSF rules? - ANSWER-Soil classes 1b, II, and III.
What slope percentage is suitable for standard subsurface disposal? - ANSWER-
Less than 30%.
What must be done if groundwater is found within 24 inches of the excavation? -
ANSWER-The soil profile must be examined for indications of groundwater.
What is the purpose of the site evaluation? - ANSWER-To document soil and site
conditions, determine acceptable waste treatment options, and assist in sizing and
locating treatment facilities.
What types of systems are Class IV soils suitable for? - ANSWER-Pumped effluent
drainfields, unlined ET, drip irrigation, and LPD.
