Laserfiche WebLink
• D.3.2 Cavity Dimensi <br />The size and shape of each solution-mined cavity will vary, with time. <br />the cavity shape is presented in an idealized manner, <br />The actual cavity shape will be verified as the Pilot Plant operations <br />proceed. The Bulk Sampling Program involved the extraction of only 150 to <br />200 tons of nahcolite, hence judgments as to the ultimate shape of the <br />cavity at maturity can not be made until approximately 9 to 12 months after <br />Pilot Plant start-up. <br />D.3.3 Water Diversions and Impoundments <br />Water produced during drilling will be directed to a lined retention pond. <br />This provision is intended to allow space for drill cuttings to accumulate <br />and to retain water if the quality does not meet discharge limitations. <br />Water will be direct~ad to the pond through pipes, and the pond over-flow <br />• will be directed to the drainage in a 12-inch diameter pipe to prevent <br />erosion. Rock rip-rap will be installed in the drainage at the pond <br />discharge point to prevent excessive cutting and erosion in the drainage. <br />IRI will apply for an NPDES permit in October 1983, to allow surface <br />discharge of water produced during drilling. This water will contain minor <br />amounts (approximately 100-ppm) of foaming agent. The foaming agent, <br />required to clear cuttings from the hole during drilling, is a non-toxic and <br />biodegradable product produced by Sooner Chemical. <br />D.3.4 Retention Pond <br />An existing 50-feet by 100-feet by 12-feet deep retention pond will be <br />upgraded to receive water produced during drilling. The pond is a balanced <br />cut and fill construction. Earthen berms will be compacted to 90 percent of <br />maximum density (ASTM-1557). Liner bedding material, consisting of rock <br />free on-site earthen material will be placed prior to the installation of a <br />new 20-mill PVC pond liner. The pond discharges through a 12-inch diameter <br />plastic pipe to the dry drainage. A valve has been installed on the <br />D-3 <br />