[Title 40 CFR S]
[Code of Federal Regulations (annual edition) - July 1, 1999 Edition]
[Title 40 - PROTECTION OF ENVIRONMENT]
[Chapter I - ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)]
[Subchapter R - TOXIC SUBSTANCES CONTROL ACT]
[Part 761 - POLYCHLORINATED BIPHENYLS (PCBs) MANUFACTURING, PROCESSING, DISTRIBUTION IN COMMERCE, AND USE PROHIBITIONS]
[Subpart S - Double Wash/Rinse Method for Decontaminating Non-Porous]
[From the U.S. Government Printing Office]
40PROTECTION OF ENVIRONMENT231999-07-011999-07-01falseDouble Wash/Rinse Method for Decontaminating Non-PorousSSubpart SPROTECTION OF ENVIRONMENTENVIRONMENTAL PROTECTION AGENCY (CONTINUED)TOXIC SUBSTANCES CONTROL ACTPOLYCHLORINATED BIPHENYLS (PCBs) MANUFACTURING, PROCESSING, DISTRIBUTION IN COMMERCE, AND USE PROHIBITIONS
Subpart S--Double Wash/Rinse Method for Decontaminating Non-Porous
Surfaces
Source: 63 FR 35472, June 29, 1998, unless otherwise noted.
Sec. 761.360 Background.
The double wash/rinse procedure is used to quickly and effectively
remove PCBs on surfaces. It is important to select and use the proper
cleanup equipment, to conduct the procedure correctly so as not to
redistribute PCBs, and to comply with disposal requirements for all
cleanup materials.
Sec. 761.363 Applicability.
The double wash/rinse procedure includes two washing steps and two
rinsing steps. The two washing and rinsing steps are slightly different
depending on whether a contaminated surface was relatively clean before
the spill (see Sec. 761.372), or whether the surface was coated or
covered with dust, dirt, grime, grease or another absorbent material
(see Sec. 761.375).
Sec. 761.366 Cleanup equipment.
(a) Use scrubbers and absorbent pads that are not dissolved by the
solvents or cleaners used, and that do not shred, crumble, or leave
visible fragments on the surface. Scrubbers and absorbent pads used to
wash contaminated surfaces must not be reused. Scrubbers and absorbent
pads for rinsing must not contain 2 ppm PCBs. Scrubbers and
absorbent pads used in the second rinse of contaminated surfaces may be
reused to wash contaminated surfaces.
(b) Capture and contain all solvents and cleaners for reuse,
decontamination, or disposal. Clean organic solvents contain <2 ppm
PCBs. Clean water contains <3 ppb PCBs.
Sec. 761.369 Pre-cleaning the surface.
If visible PCB-containing liquid is present on the surface to be
cleaned, thoroughly wipe or mop the entire surface with absorbent paper
or cloth until no liquid is visible on the surface.
Sec. 761.372 Specific requirements for relatively clean surfaces.
For surfaces that do not appear dusty or grimy before a spill, such
as glass, automobile surfaces, newly-poured concrete, and desk tops, use
the double wash/rinse procedures in this section.
(a) First wash. Cover the entire surface with organic solvent in
which PCBs are soluble to at least 5 percent by weight. Contain and
collect any runoff solvent for disposal. Scrub rough surfaces with a
scrub brush or disposable scrubbing pad and solvent such that each 900
cm2 (1 square foot) of the surface is always very wet for 1
minute. Wipe smooth surfaces with a solvent-soaked, disposable absorbent
pad such that each 900 cm2 (1 square foot) is wiped for 1
minute. Any surface <1 square foot shall also be wiped for 1 minute.
Wipe, mop, and/or sorb the solvent onto absorbent material until no
visible traces of the solvent remain.
(b) First rinse. Wet the surface with clean rinse solvent such that
the entire surfaces is very wet for 1 minute. Drain and contain the
solvent from the surface. Wipe the residual solvent off the drained
surface using a clean, disposable absorbent pad until no liquid is
visible on the surface.
(c) Second wash. Repeat the procedures in paragraph (a) of this
section. The rinse solvent from the first rinse (paragraph (b) of this
section) may be used.
(d) Second rinse. Repeat the procedures in paragraph (b) of this
section.
Sec. 761.375 Specific requirements for surfaces coated or covered with dust, dirt, grime, grease, or another absorbent material.
(a) First wash. Cover the entire surface with concentrated or
industrial strength detergent or non-ionic surfactant solution. Contain
and collect all cleaning solutions for proper disposal. Scrub rough
surfaces with a scrub
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brush or scrubbing pad, adding cleaning solution such that the surface
is always very wet, such that each 900 cm2 (1 square foot) is
washed for 1 minute. Wipe smooth surfaces with a cleaning solution-
soaked disposable absorbent pad such that each 900 cm2 (1
square foot) is wiped for 1 minute. Wash any surface <1 square foot for
1 minute. Mop up or absorb the residual cleaner solution and suds with
an clean, disposable, absorbent pad until the surface appears dry. This
cleaning should remove any residual dirt, dust, grime, or other
absorbent materials left on the surface during the first wash.
(b) First rinse. Rinse off the wash solution with 1 gallon of clean
water per square foot and capture the rinse water. Mop up the wet
surface with a clean, disposable, absorbent pad until the surface
appears dry.
(c) Second wash. Follow the procedure in Sec. 761.372(a).
(d) Second rinse. Follow the procedure in Sec. 761.372(b).
Sec. 761.378 Decontamination, reuse, and disposal of solvents, cleaners, and equipment.
(a) Decontamination. Decontaminate solvents and non-porous surfaces
on equipment in accordance with the standards and procedures in
Sec. 761.79(b) and (c).
(b) Reuse. A solvent may be reused so long as its PCB concentration
is <50 ppm. Decontaminated equipment may be reused in accordance with
Sec. 761.30(u). Store solvents and equipment for reuse in accordance
with Sec. 761.35.
(c) Disposal. Dispose of all solvents, cleaners, and absorbent
materials in accordance with Sec. 761.79(g). Dispose of equipment in
accordance with Sec. 761.61(a)(5)(v)(A), or decontaminate in accordance
with Sec. 761.79(b) or (c). Store for disposal equipment, solvents,
cleaners, and absorbent materials in accordance with Sec. 761.65.