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173-160-440  <<  173-160-442 >>   173-160-444

PDFWAC 173-160-442

What are the limitations for use of drilling materials?

(1) At no time shall a product contain materials that:
(a) Are toxic or polluting;
(b) Develop odor or color changes in the water; or
(c) Serve as a microbial nutrient.
(2) Organic materials which foster or promote undesired organic growth or have the potential to degrade water quality shall not be employed in the construction of a resource protection well. This includes, but is not limited to, brans, hulls, grains, starches, and proteins, unless NSF/ANSI approved.
[Statutory Authority: Chapter 18.104 RCW. WSR 09-01-125 (Order 08-10), ยง 173-160-442, filed 12/19/08, effective 1/19/09.]
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