At sites where investigations under OAR
340-122-0225(1)(f)
indicate the presence of free product, the
responsible person must remove the free product to the maximum extent
practicable while continuing, as necessary, any actions initiated under OAR
340-122-0220 through
340-122-0230, or while preparing
for actions required under OAR
340-122-0240 through
340-122-0250. In meeting the
requirements of this rule, the responsible person must:
(1) Initiate free product removal as soon as
practicable.
(2) Conduct free
product removal in a manner that minimizes the spread of contamination into
previously uncontaminated zones by using recovery and disposal techniques
appropriate to the hydrogeologic conditions at the site, and that properly
treats, discharges, or disposes of recovery byproducts in compliance with
applicable local, state, and federal regulations.
(3) Use abatement of free product migration
as a minimum objective for the design of the free product removal
system.
(4) Handle any flammable
products in a safe manner to prevent fires or explosions.
(5) Include in the report submitted under OAR
340-122-0230(2)
a summary of free product removal activities, describing:
(a) The name of the contractor or responsible
person performing the free product removal measures;
(b) The estimated quantity, type, and
thickness of free product observed or measured in wells, boreholes, and
excavations;
(c) The type of free
product recovery system used;
(d)
The location of any on-site or off-site wastewater discharge associated with
the recovery operation;
(e) The
type of treatment applied to, and the effluent quality from, any wastewater
discharge;
(f) The steps that have
been or are being taken to obtain necessary permits for any wastewater
discharge; and
(g) The disposition
of recovered free product; and
(h)
Other information relevant to the recovery of free product at the
site.
