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The WSS Chemistry Laboratory provides the following sample collection and preservation materials: sample bottles, chemical preservatives, EPA Method 1631 Hg sampling kits, security seals, total residual chlorine test strips, pH test strips and DOC blank water.
These supply items can be ordered by completing a DWQ Laboratory Supplies Request Form and emailing it to the appropriate distribution list below.
Low-level Mercury Sampling Kits
The Metals Unit prepares sample containers in a Class 1000 clean room for low-level mercury (Hg) sample collection. Each container is assigned a number for tracking and 5% of the containers are checked for Hg contamination. Each one-station kit includes 1 cooler dedicated to low-level Hg samples, 1 empty 500-mL bottle to receive mercury-free water for the field blank and 1 500-mL bottle for the environmental sample which is filled with mercury-free blank water to be poured into the empty bottle to serve as the field blank. For additional information on Hg sampling kits, refer to the Metals Unit Memorandum, Sampling Kits for Low Level Mercury Analysis by EPA Method 1631.
General Considerations When Ordering Supplies
Sample collectors are encouraged to monitor supplies and order well enough in advance to allow for shipping through the state courier. Collectors are also asked not to stockpile preservatives and supplies because stockpiling can deplete supplies at the Central Laboratory and chemical preservatives may exceed their manufacturer's expiration date before they can be used.
A Visual Reference to Sample Collection Bottle Types
500 mL Disposable 1 L BOD/Cyanide 1 L Chlorophyll a
250 mL Coliform 1 L (wide-mouth) Oil and Grease 1 L Phenol
1 gal Pesticide/Organics 4 oz. and 8 oz. Sediment