5.65.020 Site identification and preparation.
A. Property line shall be identified by corner flagging.
B. Access to on-site sewage disposal system site shall be flagged and identified with applicant’s name, or property tax account number.
C. The path to the on-site sewage disposal system site shall be flagged and cleared.
D. Drainfield and reserve area must be sufficiently cleared so as to make ground surface contours easily observable. Further staking of proposed laterals may be necessary to demonstrate the feasibility of installation.
E. All soil test holes shall be flagged and numbered to correspond with the lot number and soil log number as shown on the design. If soil test holes are part of a proposed short plat, test hole identification shall include the proposed lot number.
1. Soil log test holes shall be placed so as to demonstrate representative soil types in the on-site sewage disposal system area and reserve area.
2. Provide for each single-family dwelling a minimum of three soil logs in representative parts of the on-site sewage disposal system area and two soil logs in the reserve area. Drainfield areas other than for a single-family residence must have at least two soil logs for every 500 square feet of disposal area and in no case shall there be less than four soil test holes.
3. Separate these holes by at least 50 feet.
4. Soil test holes shall be constructed, identified and maintained to prevent injury or damage to the general public.
5. Soil log holes must be dug to the appropriate depth to justify meeting current minimum vertical separation requirements.
6. The holes shall be of sufficient diameter for the reviewer to obtain representative samples from the soil profile and determine soil color, texture, structure of each horizon and the water table.
7. Soil test holes must be kept open for inspection until review by a representative from SHD.
8. After SHD application review has been completed, the property owner/designer is responsible for backfilling and covering soil test holes on the property.
9. Additional tests, such as percolation tests, sieve analysis, hydrometer tests, and bulk density determinations may be required if in the opinion of the Health Officer they are necessary for proper soil evaluation of a specific site. Percolation tests shall be conducted in accordance with the Falling Head Percolation Test Procedure as outlined in the EPA Design Manual, 1980, Table 3-8.
10. All soil tests must be performed in a manner consistent with the requirements of the Department of Health (DOH) Interim Soil Evaluation Guidelines (Nov. 1979).
F. If a mound system or any other type of bed is being proposed, the four corners of the mound basal area or bed corners shall be staked or flagged and labeled as “mound corner” or “bed corner.” Additionally, the mound or bed reserve area shall be flagged or staked and identified. [Res. 08-10. Revised and reapproved by DOH 12/15/94. Res. 93-32, Eff. 11/09/93. Prior code § 8.6(II)].