Laserfiche WebLink
f~ooo <br />UL!Uai•vu nLL 1J: J0 rtL1 • _ ~~ • .. ,, <br />The calculation of time of Travel from the southwestern mine pcrmit boundary to the _,_ <br />town's nearest drinking water-supply well was performed using values for aquifer parameters <br />the Alamosa Formation within which the town's drinking water-supply wells aze completed."'~e Sher <br />hydr8$C61oglCal aSSeeemant tt.er .,.-- ,-.,.F' ,t f a ~Sented~rray-letter of January <br />1$, 2000 indicated that the soy+thwrs_ f ~.,,,it boundary area of the facility is underlain by tie - <br />-" .Santa.Fe Formation, a t~~P*~ability attic. It is between this area of the facility and town that <br />- the Alamosa Formation will`b come the ground-water pathway of concern. Therefore, the <br />approach is ultraconservative as per the 5tate`s drinking water protection programsas~-wi}l~be <br />the Alamosa Formation that will be evaluated for development of the WHPA/SWAA for the <br />town's we11s.~Based on this approach, the estimated time of travel of I S yeazs from the <br />southwestem extreme of the mine permit boundary to the nearest well exceeds the State policy <br />value for drinking water protection by a factor of~ Thereforc, this facility would not fall within <br />the WHPA/SWAA based on the ground-water flow pathway alone under the State's policy and <br />ultraconservative approach to delineation. <br />If you should have any questions, please feel free to contact me at 303-312-b595. <br />,~ , <br /> <br />Sincerely, <br />Rich Mint, Hydrologist <br />Ecosystems Protection Program <br />Office of Ecosystems Protection and Remediation <br />a. Juanita Bemal, SLWSD <br />Mike McGowan, CCCD <br />Jim Dillie, CDNR-DMG <br />Cazol Russell, BEPR-EP <br /> <br />U <br />