Laserfiche WebLink
--- <br /> The Leadville Mill M1990-057 <br /> EXHIBIT U—DMO-EPP <br /> Page 14-18 <br /> —NA- -t-l(��/1f2�1c •+hi., +h., d tribbitaFy dFainiAo the M411 <br /> y u'rc cvicrrrrrZrrc anname acai�ararrrrrTScrn. r�rn, <br /> drainage <br /> Groundwater flows from the northeast to the southwest towards California Gulch at a <br /> rate of approximately 0.85 feet per day. (See Figure 14-1) California Gulch Surface and <br /> Groundwater monitoring data are presented in Appendix 14-6. California Gulch <br /> Surface and Groundwater Quality are presented in Appendix 14-7. <br /> 14.9.2 (8) GROUNDWATER QUALITY DATA <br /> ler=ated WithiR the per <br /> /l to I I1pe + 1 , 1 51 \ <br /> area�nc vdarcr�arirprc vva� cvrrccc2�za��13, 2AA9-(y4ry�endi�-=4-�Tfrem M,A 1. NO <br /> -ainle-IRRIalle-5; weFe FepeFted— wR *-hat- Sample. Sinee july 2099, the ;Agell ha-'; been dicy and <br /> CALIFORNIA GULCH <br /> There are two groundwater monitoring wells; NW13AR, and NW8A thatare located in <br /> California Gulch in close proximity(>200ft)to the permit boundary.te the Mill th-at are <br /> The wells are monitored by EPA Region VIII-California Gulch Project Group. The wells <br /> are identified on (Figure 14-2) Representative surface water sample results within 2 <br /> miles of the Mill are summarized in Appendix 14-6. Surface and Groundwater quality <br /> data are shown in Appendix 14-7. California Gulch shallow groundwater wells are <br /> considered to have low pH, moderately elevated total dissolved solids and elevated <br /> metals. Wells NW13AR and NW8A water quality for selected parameters are shown <br /> in Table 14.4. <br /> TABLE 14-4: GROUNDWATER QUALITY, CALIFORNIA GULCH <br /> Parameter Units Well Well <br /> NW13AR NW8A <br /> pH - 4.88—5.33 6.38—6.99 <br /> Total Dissolved Solids mg/I 1,110—1,210 1,490—1,660 <br /> Arsenic mg/I total metals <0.0001 <0.0001 <br /> Cadmium mg/I dissolved metals 0.335—0.370 0.05-0.1 <br /> Copper mg/I dissolved metals 0.0153-0.262 0.0032-0.05 <br /> Lead mg/I total metals ND-0.02 ND <br /> Iron mg/I dissolved metals ND-100 ND-2 <br /> Version 3.0 January 2021 <br />