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The Leadville Mill M 1990-057 <br /> EXHIBIT U-DMO-EPP <br /> Page 14-12 <br /> 1443(G) A sE-ss AEA T-/lC Pc)TCc 1TlAl AGo GGPo Y G AAnT PiA c <br /> VVLVVIVILIY I VI I V I LIY I I/lL rl VlV I VIl19I!lPp�lVTnTGTCTI'fL� <br /> An assessment of the aeid feFmingmaterials will be implementedpFieF + <br /> 14 .7 FACILITIES EVALUATION (SEc 6.4.21 (7)) <br /> 14. 7. 1 (A) SITE-SPECIFIC CONDITIONS <br /> The following site-specific <br /> environmental protection SOPS will be managed by the mill manager: <br /> • Small aMGURts quantities of designated chemicals are to will be used at any <br /> given time, miniMizingthe impact of eatastrephic—aceidental--Felease—ef <br /> designated chemicals <br /> • The desTgRatev Chemicals (reagents) are stored in the mill (Figure 4-14 <br /> secondary spill containment structures, <br /> • Within the permit area the depth to groundwater is orb te-be less than <br /> 8 0 - ve �erifw—the i e v e i v a s e arttiritrnusc of the crdesignatedr� rca r n rctrcats <br /> below-ground surface which provides a depth to minimize spills affecting <br /> groundwater quality. (Colorado State Engineers,Ground Water Section, (1990); <br /> (See Section 14.8), <br /> Tailings well o/ lei <br /> �z, ��s� od � e treated to r e��ee t}?(i�stNi"�66 nterat to ���v�-rc�3, tl�s <br /> materials. Tailings have a low moisture holding capacity <35%) and TSF <br /> multiple liners will are designed to prevent process water from migrating from <br /> the mill complex, and <br /> • Up and down gradient wells from the mill have been installed and sampled <br /> since 2014 and will be sampled quarterly in the future. Well sampling will <br /> provide water quality background and operating information to determine if <br /> water quality changes have occurred during mill operation. <br /> 14. 7.2 (B) DESIGNATED AND OTHER CHEMICALS <br /> Designated chemicals and other consumed chemicals during the milling process is <br /> summarized in Table 14.3. during the milling process „d will he ei+he-F shipped off <br /> site it the ..tFates ^ ntaiRed in the tails. <br /> Version 3.0 January 2021 <br />