Ill. Admin. Code tit. 35, § 811.316 - Plugging and Sealing of Drill Holes
All drill holes, including exploration borings that are not converted into monitoring wells, monitoring wells that are no longer necessary to the operation of the site, and other holes that may cause or facilitate contamination of groundwater shall be sealed in accordance with the following standards:
a) If not sealed or plugged
immediately, the drill hole shall be covered to prevent injury to people or
animals.
b) All drill holes no
longer intended for use shall be backfilled with materials that are compatible
with the geochemistry of the site and with the leachate in sufficient
quantities and in such a way as to prevent the creation of a pathway for
contaminants to migrate.
c) For
drill holes in gravels and other permeable strata where a watertight seal is
not necessary to prevent the creation of a pathway, drill cuttings and other
earthen materials may be utilized as backfill.
d) All excess drilling mud, oil, drill
cuttings, and any other contaminated materials uncovered during or created by
drilling shall be disposed of in accordance with the requirements of 35 Ill.
Adm. Code 700 through 749, 807 and 809 through 815.
e) The operator shall restore the area around
the drill hole to its original condition.
Notes
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