University of Illinois Extension

Quiz

Section 905.95 — Raised Filter Beds

  1. Section 905.95 — Raised Filter Beds
    Incorrect. The correct answer is highlighed in green below.

    Illinois raised bed disposal systems shall a filter loading rate of 4 gallons per square foot per day for residential systems of up to   gallons per day.
    1. 1000
    2. 2000
    3. 1500
      (905.95-a) Illinois raised filter bed disposal systems shall have a filter loading rate of 4 gallons per square foot per day for residential systems of up to 1,500 GPD flows. Non-residential systems of any size or residential systems in excess of 1,500 GPD shall use a filter loading rate of 2.5 gallons per square foot per day. The system shall be designed in accordance with Appendix A, Illustration X, Exhibits A through E.
    4. 2500
  2. Section 905.95 — Raised Filter Beds
    Incorrect. The correct answer is highlighed in green below.

    If a filter bed must exceed 600 square feet,  .
    1. It cannot be used.
    2. Unseparated multiple beds must be used using a common mantle.
    3. Beds can be placed at any point without regard to existing ground contours.
    4. Multiple beds separated by at least 15 feet and using a common mantle must be used.
      (905.95-c) Filter beds shall not exceed 600 square feet. If a larger area is needed, multiple beds must be used, separated by a minimum distance of 15 feet, using a common mantle. The filter beds can be placed at any point on the mantle in order to accommodate existing ground contours.
  3. Section 905.95 — Raised Filter Beds
    Incorrect. The correct answer is highlighed in green below.

    In the formula A=QT/25, the Q represents:
    1. Quantity of wastewater per hour
    2. Quantity of wastewater per minute
    3. Percolation time in minutes per inch
    4. Quantity of wastewater per day
      (905.95-f) The mantle shall be sized in accordance with the formula A = QT/25, where A = Mantle Area, Q = Quantity of wastewater per day, and T = Percolation time of the original soil in minutes per inch. (See Section 905.Appendix A, Illustration X, Exhibit E to convert soil investigation information to T (percolation time).)
  4. Section 905.95 — Raised Filter Beds
    Incorrect. The correct answer is highlighed in green below.

    The mantle area shall be cut into original soil to a depth of ___ inches and back filled with _____ inches of torpedo sand.
    1. 10 and 12
    2. 12 and 6
    3. 12 and 18
    4. 6 and 12
      (905.95-h) The mantle area is to be cut into original soil to a depth of 6 inches and back-filled with 12 inches of torpedo sand that is graded as FA1-FA8 in accordance with Standard Specifications for Road and Bridge Construction, adopted January 1, 2002 by the Illinois Department of Transportation.
  5. Section 905.95 — Raised Filter Beds
    Incorrect. The correct answer is highlighed in green below.

    _____ shall be placed over the filter beds and mantle
    1. Sod
      (905.95-l) Sod shall be placed over the filter beds and mantle.
    2. 3/4 inch stone
    3. 2 inch stone
    4. Pea gravel