2011-01-06_REVISION - M1977300

• Permit No: M1977300
• IBM Index Class Name: REVISION
• Doc Date: 1/6/2011
• Doc Name: Corehole Grouting Plan
• From: Whetstone Associates
• To: Cotter Corporation and DRMS
• Type & Sequence: TR16
• Email Name: DB2
• Media Type: D
• Archive: No

Whetstone
Associates
Technical Memorandum
Table 1. Water Quality in Schwartzwalder Domestic Well for use in Mixing Grout
Results Results Results Results
PARAMETER 6/17/09 10/14/09 2/18/10 8/19/10
pH (std units) 7.06 6.75 7.02 7.22
Conductivity, specific (uS/cm) 270 350 270 356
Total dissolved solids 174 161 146 211
Alkalinity, total 64 76 64 100
Calcium, dissolved 27.5 32.1 27.4 37.3
Magnesium, dissolved 7.3 8.5 7.7 10
Sodium, dissolved 10.4 10.6 13.1 13.4
Potassium, dissolved 1.7 1.7 1.3 2.3
Sulfate 34 31 26 20
Chloride 23 34 35 41
Aluminum, dissolved <0.2 <0.2 <0.2 <0.2
Aluminum, total <0.2 <0.2 <0.2 <0.2
Antimony, dissolved <0.001 <0.001 <0.001 <0.001
Antimony, total <0.001 <0.001 <0.001 <0.001
Arsenic, total <0.1 <0.1 <0.1
Copper, dissolved <0.005 <0.005 <0.005 <0.005
Copper, total <0.005 <0.005 <0.005 <0.01
Iron, dissolved 0.04 <0.03 0.04 0.08
Iron, total 0.23 0.19 0.71 0.11
Iron, Ferric Fe3+ 0.19 0.16 0.67
Lead, total <0.005 <0.005 <0.005
Manganese, dissolved 0.02 <0.01 <0.01 0.04
Manganese, total 0.03 <0.01 0.02 0.04
Mercury, total <0.0001 <0.0001 <0.0001
Molybdenum, dissolved <0.005 <0.005 <0.005 0.008
Silver, total <0.001 <0.001 <0.001
Thallium, dissolved <0.001 <0.001 <0.001 <0.001
Thallium, total <0.001 <0.001 <0.001 <0.001
Zinc, total <0.005 0.005 <0.005 <0.005
Uranium, dissolved 0.0036 0.009 0.009 0.0078
Radium-226, dissolved ( Ci/L) 0.11 0.14 0.06 <0.1
Note: All units are in mg/L unless otherwise noted.
3. TESTING AND GROUTING PROCEDURES
The corehole will be grouted in three stages moving upward (Table 2). The first stage will include
the bedrock below the 2-inch steel casing and will be grouted by setting a packer just below the top
of bedrock and injecting grout into the section below. The second stage will include the transition
between bedrock corehole and iron casing pipe and will be grouted by setting a packer in an intact
section of the 2-inch casing approximately 10 feet above the transition and injecting grout into the
section below. The third stage will include the remaining section of the damaged 2-inch casing and
will be grouted by setting a packer near the top of the casing and injecting grout into the section
below. Grouting pressures in the potentially fractured bedrock will be limited to 2 psi per foot of
depth or less referenced to the center of the section. Grouting pressure in the unconsolidated
sections will be limited to less than 1 psi per foot of depth at the center of the section.
4109C.110106