1. (a) The pipe, laid in a bed or trench of sufficient width and depth, shall be supported by approved septic stone as specified in (b), below.
2. (b) Approved septic stone shall be clean, uniformly-sized washed crushed stone, washed rock, or similar aggregate sized as specified in Table 1016-2, below.

3. (c) Approved septic stone shall be certified by its producer or distributor as meeting the sieve size and percent passing by weight requirements specified in Table 1016-2, below, based on testing done in accordance with test method T11 as published by AASHTO:

   Table 1016-2: Approved Septic Stone Sieve Analysis Specifications

   Crushed Stone (Ledge)

   Crushed Gravel

   Sieve Size

   Percent Passing By Weight

   Sieve Size

   Percent Passing By Weight

   2 inches

   100

   3 inches

   100

   1.5 inches

   90 – 100

   2 inches

   95 - 100

   3/4 inch

   0 –10

   1 inch

   0 - 10

   #4

   0 – 5

   #4

   0 – 5

   #200

   0 – 2

   #200

   0 - 2

Source. (See Revision Notes #1 and #2 at chapter heading for Env-Wq 1000) #11184, eff 10-1-16; ss by #14486, eff 2-1-26, EXPIRES: 2-1-36 (formerly Env-Wq 1016.04)