A sump may be located within the diked or secondary containment area as an alternative to the recessed catch drain if:

1. (a) the sump construction conforms to the thickness specifications for the remainder of the containment base;
2. (b) the sump is drained over the wall of the containment structure by means of a pump;
3. (c) no valve is plumbed into the sump unless the sump has a permanent catchment system as described in K.A.R. 4-4-911; and
4. (d) materials removed from the sump are disposed of in a manner consistent with K.A.R. 4-4-935.

(Authorized by and implementing K.S.A. 1989 Supp. 2-1227; effective Jan. 14, 1991.)