HomeMy WebLinkAbout2015-03-05 Memo - Containment 1
MEMORANDUM
TO: File
FROM: Carl E. Lawson, Jr., Hazardous Waste Inspector
SUBJECT: Hazardous Materials Containment
Kaleidoscope Imprints
103C Mid Tech Drive
DATE: March 5, 2015
Containment Area for Print Screen Reclaiming System
Kaleidoscope Imprints purchased and installed a Dane brand DW 125 model
semiautomatic print screen reclaiming unit that removes both ink and emulsion
from the screens in two different processes with two different cleaning agents.
The Dane unit has the following capacities within integral reservoirs.
Ink Remover 53 gallons (typically filled w/40 gal.)
Stencil (emulsion) Remover 36 gallons (275 gal. including IBC)
Stencil Remover Concentrate 7.5 gallons
High Pressure Pump Tank 20 gallons of tap water
The ink remover is a solvent that always remains in the machine.
The stencil remover is a mixture of water and stencil remover concentrate. This
mixture recirculates between the integral machine reservoir and a 275-gallon
Intermediate Bulk Container (IBC). The total mixture of stencil remover used is
about 275 gallons as the integral machine reservoir and the IBC cannot both be
filled to capacity.
The stencil remover concentrate is dispensed to the stencil remover (water and
concentrate mixture) as needed as the solution breaks down and loses its
effectiveness.
The high pressure pump tank contains only water.
One 55-gallon drum of ink remover solvent is presently stored although in the
future the additional drum will be acquired once the solvent within the integral
machine reservoir is spent and requires removal. Then the contents of almost the
entire drum will be added to the machine reservoir almost immediately upon its
delivery.
Therefore, the total volume of material in this area in need of containment is as
follows:
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Ink Remover 53 gallons (in machine reservoir)
Stencil (emulsion) Remover 275 gallons (including IBC)
Stencil Remover Concentrate 7.5 gallons
Ink Remover Drum 55 gallons
390.5 gallons
PRINT SCREEN CONTAINMENT AREA VOLUME CALCULATIONS
The concrete containment area is painted with an impervious coating and is 3.5”
high and forms three rectangles that are all interconnected providing a
containment volume calculated as follows:
Rectangle 1
159” long x 72” wide x 3.5” high = 40,068 cubic inches
Rectangle 2
117” long x 68” wide x 3.5” high = 27,846 cubic inches
Rectangle 3
72” long x 69” wide x 3.5 inches high = 17,388 cubic inches
Total Containment Area Volume
Rectangle 1 + Rectangle 2 + Rectangle 3 =
40,068 + 27,846 + 17,388 = 85, 302 cubic inches
85,302 cubic inches / 231 cubic inches per gallon ~ 370 gallons of containment
Comparison of material volume to containment volume
Material volume = 390.5 gallons
Containment volume = 370 gallons
Normally the spare 55-gallon drum of solvent will not be stored thereby making
the material volume 335.5 gallons.
The containment area calculations from the owner will be forwarded to the Health
Dept.
The containment area dimensions will be measured again at the next inspection
to verify accuracy.
Uncured Emulsion Wash Area
This area consists of the following:
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1) A series of adjacent spill control pallets on top of which all equipment is
placed.
2) Two wash basins with booth sides that each drain to their own small
drums (55-gallon drums cut to about ½ of their original height).
3) A small hand-held power wash wand that is manually operated to wash
the uncured emulsion from the screens.
Materials contained: two small drums of wash water. The drums are each 55-
gallon drums cut to about ½ of their original height making each drum about 27.5
gallons in capacity and each is contained on a 66-gallon sump capacity spill
control pallet.
Dedicated Ink Removal Room
Occasionally a screen design is to be used again so the cured emulsion has to
be left in place while the ink is removed. In this case the screen(s) are cleaned of
ink only inside a dedicated room. This room is itself a bermed area.
A parts wash basin draws solvent from a 30-gallon drum that is filled with only 17
gallons of solvent. A second drum may be present for adding to the system as
solvent evaporates. The containment of the room exceeds the volume of solvent
in the two drums.
Ink and Emulsion Storage
New ink and emulsion are both semisolid materials that are stored on shelves
against a wall within a concrete containment area. Steve Karras estimates 75 -90
gallons are stored.