Section 410IAC6-8.3-87. Elevated sand mound on-site sewage systems: placement of the sand on the basal area

   (a) The basal area shall be covered using sand that meets the requirements listed in Table XV in section 80(j) of this rule.

  (b) INDOT Specification 23 sand shall be placed on the tilled area immediately after tilling the site to protect the tilled surfaces from damage by precipitation.

  (c) The depth of the INDOT Specification 23 sand under the aggregate bed shall be at least twelve (12) inches (on sites with slopes greater than one-half percent (1/2%), the depth of INDOT Specification 23 sand beneath the downslope side of the aggregate bed will be greater than twelve (12) inches).

  (d) INDOT Specification 23 sand shall be placed on the tilled surface as follows:

(1) On sites with slopes one-half percent (1/2%) or less, from the ends of the elevated sand mound.

(2) On sites with slopes greater than one-half percent (1/2%) and less than or equal to six percent (6%), from the ends or upslope edge of the elevated sand mound.

  (e) At least six (6) inches of INDOT Specification 23 sand shall be kept between the vehicle tracks or tires and the tilled soil of the site.

  (f) The depth of INDOT Specification 23 sand around the aggregate bed shall be the sum of:

(1) the depth of the sand under the aggregate bed; and

(2) the depth of the aggregate bed.

  (g) A one (1) foot wide border of INDOT Specification 23 sand shall surround the aggregate bed, level with the top of the aggregate bed. (Indiana State Department of Health; 410 IAC 6-8.3-87; filed Oct 19, 2012, 2:06 p.m.: 20121114-IR-410120156FRA)