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HYDRO31476
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HYDRO31476
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Last modified
8/24/2016 8:55:10 PM
Creation date
11/21/2007 1:48:39 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999051
IBM Index Class Name
Hydrology
Doc Date
7/11/2000
Doc Name
Modification Requests
From
Roger Day
To
DMG
Permit Index Doc Type
Correspondence
Media Type
D
Archive
No
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07/11!2000 13:57 9706259137 <br />APIERALIA, INC <br />AmerAlia's pres®t ground water monitoring program has proven that aprotective in-situ <br />pr~srrce gradient does protect the overlying drinking water aquifers. AmerAlia's mine phm is not <br />expected to impact the Dissolution SmTace Aquifer. In the worst case scaerario, AmaAGa's <br />potential impact to the Disaotuaon Surface Aquifer water quality could not extxod the impacts <br />already found acceptable and approved by Cite BLM, EPA, and DMO for the WR1VM and <br />Americmr Soda projects. AmerAlia believes the key to protecting the undagrotmd drinlong <br />water resource dtrting soluUOn mining is maintenmece of the protective in-situ ptessme gradio~. <br />Water does not flow uphill or up gradient. Best managema>rt peaetice acrd high confidence permit <br />compliance verifieatian would result from ao automatic gradient maasurmnent and recordmg <br />pro®am for the Dissolution Surface Aquifer. <br />Sohrtion mining experience in the Piceance Basin beer also shown in-sits pressure monitoring is <br />the host method of early stage casing or cavity leakage detection seeded to avoid eery significam <br />adverse impact. <br />AmerAlis feels it is unwise, tmnecessecy, and taviro~ttaUy threatening to continue water <br />quality sampling MWD-1 and MWD-2. Instead, an automated in-situ presaeere measuring sad <br />[eCOfdtng system has boon metalled. 1Lia Will be AmerAlia's primary means ofpm6octing the <br />ov~lyiog aquifers. 1a addition, AmaAlia plans w continue the MWU4, MWA-2 end MWB-2 <br />baseline sampling and water quality analysis per the monitoring plan. <br />AmerAlia feels additional sampling and water quality tearing of MWD-1 and MWD-2 is <br />uawatr~ted and suggests appropriate modification ofthe Surface and Gromrdwater Monitoring <br />Plan. <br />Ileaok you for your nnderetanding and please calf me with airy questions. <br />Sin/ <br />Roger Day ~~ <br />Vice President, Operations <br />PAGE 04 <br />a. J. Clark <br />J. Daub <br />
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