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Page Title: D.4.3 Collection and preservation of column leachate samples for total metal, chloride ion, total organic carbon, pH, and ele...
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j.  Weigh the 5,000-mL beaker, spatula, and scoop. Use the scoop to
transfer approximately 4 kg of sediment to the beaker. Record the total
weight of the sediment, beaker, spatula, and scoop.
k. Slowly fill the sediment chamber with sediment from the beaker, while
carefully avoiding entrapment of air bubbles. When the sediment is
level with the top part of the sediment chamber, carefully smooth the
surface of the sediment with the spatula. (Note: In order to properly
seat the top distribution plate, clean the groove in the sediment
chamber.)
l.  Place a distribution plate on top of the sediment chamber. Place a glass
fiber filter on top of the distribution plate. Wet the O-ring before
placing it in the top groove of the sediment chamber.
m. Carefully place the top plate on the sediment chamber, aligning the plate
with the threaded rods in the base plate. Tighten all nuts. Connect -in.
stainless steel tubing to the outlet of the top plate.
n. Connect a suitable length of stainless steel, or teflon tubing to the outlet
of the top plate. (Teflon is recommended for leaching of metals.)
o. Set the dial indicator to obtain the correct flow rate for experimental
conditions. Turn on the fluid pump, carefully check all areas for leaks,
and tighten connections if necessary.
p. Reweigh the beaker, spatula, scoop, and sediment remaining in the
beaker. Determine the weight of sediment in the column leach
apparatus, by difference, and record this weight.
D.4.3 Collection and preservation of column leachate samples for
total metal, chloride ion, total organic carbon, pH, and electrical
conductivity analyses
This procedure describes the collection and preservation of samples
generated from leaching of sediment and dredged material in laboratory column
leaching apparatus. Column leachate samples are collected at a prescribed
frequency, preserved with acid to pH < 2, and stored at 4 EC prior to metals,
chloride ion, and total organic carbon (TOC) analyses. The pH and electrical
conductivity are determined on discrete nonacidified samples.
A. Sampling and preservation materials.
Analytical balance
pH paper
Parafilm, minimum 4 in. in width
D16
Appendix D Leachate Testing Procedures

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