D.4.4 Collection and preservation of column leachate samples for analysis of organic constituents

e. After each metal/chloride and TOC leachate sample has been collected,

place a labeled, preweighed 20-mL polyethylene bottle under the column

outlet. Collect approximately 12 g of leachate. (Reweigh the bottle to

determine the exact weight of leachate.) Check the pH and electrical

conductivity of this sample on a pH meter and electrical conductivity

meter.

D.4.4 Collection and preservation of column leachate samples for

analysis of organic constituents

This procedure describes collection and preservation techniques for samples

generated from leaching of sediments, and dredged materials in laboratory

column leaching apparatus. Column leachate samples are collected in amber

glass bottles, in a prescribed manner. The samples are stored at 4 EC, then

analyzed for polycyclic aromatic hydrocarbons (PAHs), polychlorinated

biphenyls (PCBs), and other related organic constituents.

A. Materials.

Analytical balance

Labeling tape

Fraction Collector, with the capability of time-based sample collection in

seconds or minutes (Example: Eldex Laboratories, Inc., Model UP-1A)

Silicone tubing, plasticizer-free, additive-free (1/8 in. ID H 1/4 in. OD

and 1/4 in. ID H 3/8 in. OD)

Amber glass bottles with Teflon-lined lids, precleaned to EPA Level 1:

1,000 mL

Distilled-deionized (DDI) water conforming to ASTM Type II (ASTM

D1193-99) (ASTM 1999).

Methanol, pesticide grade or equivalent

B. Procedure for preparation of fraction collector.

a. Assemble the Fraction Collector according to manufacturer's

instructions, and place it on the table near the Column Leach Apparatus

described previously. Attach a 12-in. section of silicone tubing (1/8-in.

ID H 1/4-in. OD, cleaned with methanol and rinsed repeatedly with DDI

water) to the outlet tubing on the Column Leach Apparatus.

b. Attach 1/8-in. ID silicone tubing to the bottom of the glass tubes on the

Fraction Collector. (This silicone tubing will be later connected to

1/8-in. stainless steel tubing inserted in lids used to cover the amber

bottles during sample collection.)

D19

Appendix D Leachate Testing Procedures