Section III: Fill In The Blank |
For problems 31 through 50, choose the best response. Place the letter of the response you choose in the space to the right of the number (1 point each). |
31. The drain rock must be separated from the backfill material by: |
A. Newspaper | B. Straw | C. Untreated building paper |
D. Non-woven geotextile fabric | E. Cardboard | |
32. The best use of the land over a drainfield would be: |
A. A Livestock Corral | B. A Lawn | C. A Parking Area |
D. A Garden | E. An Orchard | |
33. Which of the following is not required of septic tanks: |
A. Risers to surface grade | B. Secured to prevent unauthorized entry | C. 50' from a single family well |
D. Watertight | E. All are required of septic tanks | |
34. Where can you find the required trench depth of the drainlines: |
A. Your Septic Permit | B. BFHD Board of Health Rules and Regs No.2 | C. Drainfield cross-section sheet |
D. Trench depth is a standard known depth of 36 inches | E. Both A and C | |
35. Distribution boxes must be: |
A. Level | B. Watertight | C. Set up to provide equal distribution |
D. All of the above | | |
36. Gravelless chambers do not require: |
A. Filter fabric over the chambers | B. One observation port per lateral | C. Splash plates to avoid erosion when entering chamber |
D. Raking the trench bottom | E. Level Trenches | |
37. For a system requiring three 90’ laterals, equal distribution should be accomplished using: |
A. Four-inch PVC tees | B. A plastic drop box | C. Step-downs |
D. A distribution box | E. A serial network | |
38. When abandoning and installing a new septic tank, the following action is not required: |
A. Have the tank pumped | B. Excavate and remove the failed tank | C. Remove or destroy lid |
D. Permit for new tank | E. Backfill with soil | |
39. The reserve area of a septic system drainfield: |
A. Must be 75% of the active drainfield | B. Can be used for shop/garage construction | C. Allows for a space to drill a well |
D. Should be used to drain snowmelt away from the system | E. Allows for repair when a system fails | |
40. The slope on the last ___feet before the tank must not be more than ¼” per foot. |
A. 2 | B. 4 | |
C. 5 | D. 10 | |
41. The minimum pipe rating required in Benton and Franklin Counties for septic tank inlet and outlet lines is: |
A. Schedule 40 PVC | B. 4" ABS or PVC 1000 lb crush strength | C. 4" ABS or PVC 4000 lb crush strength |
D. ASTM D1785 | E. ABS 1210 | |
42. Minimum slope is ____per foot from the house to the tank (plumber’s grade). |
A. 1/8" | B. 1/4" | |
B. 1/5" | D. 1/3" | |
43. To request a final inspection of your drainfield installation you must: |
A. Call the environmental Health front desk | B. Submit the request on our website | C. Call your inspector to see when they are available |
44. The minimum pipe rating required in Benton and Franklin Counties for drainfield lines: |
A. Schedule 40 PVC | B. 4" PVC, perforated pipe 1000 lb crush strength | C. 4" ABS or PVC 4000 lb crush strength |
D. ASTM D1785 | E. ABS 1210 | |
45. Drainfield trenches must meet all of the following except: |
A. Installed in original, undisturbed soil | B. No deeper than specified on the permit | C. Separated by 10 foot on center |
D. Pipe fitting joints must be glued | E. Sloped - no more than 2 inches of drop per 100 feet | |
46. From the D-box outlet to the start of perforated pipe and/or chambers, you must have ____feet of solid pipe. |
A. 1 | B. 5 | |
C. 10 | D. 3 | |
47. Pipe and gravel drainfields require all of the following except: |
A. At least 6" of drainrock in the bottom of the trench | B. A minimum drainrock depth of 12" | C. Perforated pipe drain holes oriented at 10 and 2 o'clock |
D. Observation ports on the ends of laterals | E. Non-woven geotextile filter fabric separating drainrock and backfill | |
48. Maximum allowable backfill soil depth over drainfield trenches is: |
A. 6-12" | B. 12-24" | |
C. 24" | D.12-18" | |
49. At final inspection the system must: |
A. Have all components installed, tank properly bedded with top exposed, lids secured, and no part of the install backfilled. | B. Have D-Box level and brought to surface grade |
C. Have any sleeving exposed | D. All of the above | |
50. If a problem is encountered during install, you should do the following: |
A. Note it on your inspection request submittal | B. Stop work and call the Health District for further information |
C. Mention the issue you encountered with the inspector when they are out for inspection | D. Proceed with the best option |