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9) Refer to item 4 above for mining phases. The reclamation phases will coincide with the mining <br />phases. Also, see Exhibit E for slope and reclamation plan. Reclamation will begin after Phase II <br />of the mining plan is complete <br />10) Prior to any mining operations, the sediment control system will be installed, which consists of a <br />30 foot high berm made of topsoil on the South side of the property. This berm will isolate <br />runoff water on and off the site. A 7 foot high topsoil berm will be placed on the east side of the <br />permit area for the same purpose. The berms will also contain the runoff from the 100 year/24 <br />hour event within the permit area. If a 100 year flood occurs, the berms should isolate the <br />permit area from the rest of the flood plain. All of the sheet flow will be directed to a central <br />location (which from this point will be known as the discharge point). According to Colorado <br />Department of Public Health and Environment Process water monitoring requirement will be <br />complied with. The following is CDPHE general requirements, however, based on the location <br />there will be site specific requirement which will be complied with. Prior to discharge all sheet <br />flow will enter a setting pond. <br />The above categories are subject to 40 CFR Part 436 Subparts B (Crushed Stone), and C <br />(Construction Sand and Gravel). These limitations also apply to all other industrial facilities <br />covered under SIC Code 14 (that are not covered below). The following limitations apply as <br />outlined in these subparts. <br />Parameter Limitations Rationale Monitoring Sample Type <br /> Frequency i <br /> 30-Day Avg. 7-Day Avg. Daily Max. <br />- General Permit Requirements - <br />Flow, MGD Report NA Report Discharge Continuous / Recorder / In- <br /> Evaluation Instantaneous2 situ 2 <br />pH, s.u. N/A NA 6.5-9.0 Water Quality Weekly Grab <br /> Standards <br />Oil and Grease, mg/f N/A NA 10 State Effluent Weekly Visual 3 <br /> Re lations <br />Total Suspended Solids, 30 45 NA State Effluent Weekly Grab <br />m Regulations <br />Site Specific Limitations _ <br />Total Dissolved Solids, Report NA Report Salinity Quarterly 4 Grab <br />m . Regulations <br />Total Phosphorus (as Report NA Various Control Monthly Grab <br />P), m ** Regulations <br />Other Pollutants of Various NA Various Water Quality Weekly Grab <br />Concern Standards <br />Whole Effluent Stat Diff and IC25 > IWC State Permit Quarterly 3 Grab/Test <br />Toxicity (WET) LC50 > 100% Limitations Quarterly Grab <br />Chronic <br />Acute <br />11) The portable enclosed crusher and screen plant do use sprays for dust control, although the <br />gravel will be somewhat wet after excavation from below water level, and the need for <br />additional water in the operation will be minimal. Estimated use for the crusher/screen plant is <br />2% of the annual tonnage run through the plant, approximately 52,000 tons per year. This.