DRC-2009-006168 - 0901a0688014b6bc

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State of Utah
JONM. HUNTSMAN. JR.
Goi'ernoi
GARY HERBERT
Ueuleriani Governor
\\tc^.9cm-coioiu-e
Department of
Environmental Quality
Amanda Smith
.^riinn Exenilivc Director
DIVISION OF RADIATION CONTROL
Dane L. Finerfrock
Direcior
November 9, 2009
CERTIFIED MAIL
RETURNED RECEIPT REQUESTED
Mr. Steven D. Landau
Manager, Environmenlal Affairs
Denison Mines Corp (DUSA)
Independence Plaza, Suite 950
1050 Seventeenth Street
Denver, CO 80265
SUBJECT: Editorial Corrections for Future Chloroform Monitonng Reports for the Chloroform
Contamination Investigation, Dennison Mines (USA) Corp., White Mesa Uranium
Mill, near Blanding, Utah
Dear Mr. Landau:
During the review of the 3'" and 4'^ Quarter 2008 and 1'' Quarter 2009 Chloroform Monitoring
Repons there were found to be some editorial errors. Below describes these editorial errors and
corrections needed for future chloroform monitoring reports:
1. In section 2.1.1 ofthe 3"^ and 4'^ Quarter 2008 and l"' Quarter 2009 Chloroform Monitoring
Reports lists chloroform monitoring wells that are to be sampled. This list needs to be
corrected with the following information to reflect current list of monitor wells thai are to be
sampled as part ofthe chloroform contamination investigation:
• Well TW4-A has been abandoned needs to be removed from the list.
• Wei] TW4-15 needs to be re-identified as MW-26.
• Well TW4-I7 needs to be re-identified as MW-32.
• Wells TW4-23, TW4-24, and TW4-25 need lo be added to the list of required wells lo be
sampled.
2. In the table below, shows a discrepancy between the total well depths recorded in the as-built
well diagrams (HOC 2002) and lotal well depths recorded in the tables for the historical
groundwater depths recorded in lab K for 3^^ Quarter 2008 report, and tab G for 4^*^ Quarter
2008 report, and tab G for I'' Quarter 2009 report.
108 North I9:i0 West-Sail Lake Cily. UT
Mniling Address: PO Box 144850 • Snii Uke City. UT 84114-4850
Telephone [phone] • Fax (801) 5.1:^-4097 • T.D.D (ROI) 536-4414
wtn\' rieq.iilrih ynv
I'rimed on IOO* recyt;lciJ p;iper
Page 2
Well
1 • •
TW4-10
TW4-11
TW4-12
TW4-13
TW4-14
TW4-i6
TW4-18
TW4-19
MW-32
Total Well Death Recorded in
the As-built Well Diagrams
(HOC 2002)
no 110
101
102.5
92.5
142
132.5
137.5
125
Total Well Depth Recorded in
the Historical Tables in Tab K
for y^ Quarter 2008 Report,
and Tab G for 4'^ Quarter 2008
Report, and Tab G T' Quarter
2009 Report.
121.33
121.33
121.33
121.33
121.33
121.33
121.33
121.33
121.33
Please make the above corrections for future chloroform monitoring reports. Thank you for your
cooperation. Please contact Dean Henderson at 801-536-0046 with any questions.
Sincerely
Dean C, Henderson, PG
Utah Division of Radiation Control
DCH
F:\DUSA\Editorial Corrections Letler.doc