4.1 Class 1 Areas
Class 1 areas are areas that have a potential for radioactive contamination as determined by previous radiation surveys. A typical area for survey units of Class 1 is given below.
Classification Suggested Area
Class 1 structures up to 100 m2 surface area
Class 1 land areas up to 2,000 m2
Class 1 areas for the BOMARC site include:
The exclusion zone, including the concrete apron
Soils under and surrounding Shelter 204
The underground support structures of Shelters 202, 204, and 206
The drainage ditch from the concrete apron to the CMP
The corrugated metal pipe (CMP) area
Four areas west of Highway 539 identified in the ROD
The structure of Shelter 204
Tables 4.1, 4.2, and 4.3 list Class 1 survey units for the above described land areas. In the table, the letter numbers represents the grid designation which is from the Characterization Report, Reference 2.2, that bounds the survey unit on that side (See drawings 799147 B5 through B8, Appendix F. For example, survey unit EZ-1 is bound on the northwest by the grid A15, on the southwest by C15, northeast by A10, and southeast by C10. This gives a survey unit that is 30 meters by 60 meters. Survey units located west of Highway 539 are identified by their Characterization Report, Reference 2.2, size and walkover sample designation.
Table 4.1
Exclusion Zone Survey Units
Reference Drawing 799147 B5
|
Descriptor |
NW |
SW |
NE |
SE |
|
EZ-1 |
A15 |
G15 |
A10 |
C10 |
|
EZ-2 |
A9 |
C9 |
A4 |
C4 |
|
EZ-3 |
A3 |
F3 |
A1 |
F1 |
|
EZ-4 |
D15 |
E15 |
D13 |
E13 |
|
EZ-5 |
D12 |
E12 |
D10 |
E10 |
|
EZ-6 |
D9 |
E9 |
D8 |
E8 |
|
EZ-7 |
D7 |
F7 |
D4 |
F4 |
|
EZ-8 |
F9 |
H9 |
F8 |
H8 |
|
EZ-9 |
F15 |
H15 |
F14 |
H14 |
|
EZ-10 |
F13 |
H13 |
F12 |
H12 |
|
EZ-11 |
F11 |
H11 |
F10 |
H10 |
|
EZ-12 |
G7 |
H7 |
G4 |
H4 |
|
EZ-13 |
G3 |
L3 |
G1 |
L1 |
|
EZ-14 |
I15 |
J15 |
I14 |
J14 |
|
EZ-15 |
I13 |
J13 |
I12 |
J12 |
|
EZ-16 |
I11 |
M11 |
I8 |
M8 |
|
EZ-17 |
I7 |
L7 |
I4 |
L4 |
|
EZ-18 |
K15 |
M15 |
K14 |
M14 |
|
EZ-19 |
K13 |
M13 |
K12 |
M12 |
Table 4.2
Drainage Ditch And Corrugated Metal Pipe Survey Units
Reference Drawing 799147-B6 & B7
|
Descriptor |
NW |
SW |
NE |
SE |
|
DMP-1 |
F2 |
G2 |
F1 |
G1 |
|
DMP-2 |
H2 |
I1 |
H1 |
I1 |
|
DMP-3 |
J2 |
K2 |
J1 |
K1 |
|
DMP-4 |
L2 |
N2 |
L1 |
N1 |
|
DMP-5 |
O2 |
Q2 |
O1 |
Q1 |
|
DMP-6 |
R2 |
S2 |
R1 |
S1 |
|
DMP-7 |
P1 |
P3 |
R1 |
R3 |
|
DMP-8 |
P4 |
P6 |
R4 |
R6 |
Table 4.3
Area West of Highway 539 Identified In Rod Survey Units
Reference Drawing 799147-B8
|
Descriptor |
Dimension |
Walkover Sample Design |
|
HWY-1 |
70 X 150 |
WOE-1 |
|
HWY-2 |
100 X 75 |
WOE-2 |
|
HWY-3 |
100 X 75 |
WOE-3 |
|
HWY-4 |
50 X 50 |
WOE-4 |
|
HWY-5 |
Concrete
Culvert |
WOEO
A&B |
The size and dimension of the above survey units may be changed as remediation occurs or project specific concerns arise with the concurrence of the project manager and the contracting officer's representative. New survey units will be defined as original units as needed.
The floor, ceiling and walls of Shelter 204 and the floor and lower walls (up to 2 meters) of the underground support structures are considered Class 1 areas. These areas will be divided into survey units that are less than 100 m2 each, or into a logical area survey unit depending on the physical lay out.
These survey units will be treated separately and divided into 1 m2 grid units. The survey units may include the floor as a single survey unit, the walls as a survey unit, and the ceiling as a survey unit. The underground support structures of Shelters 202 and 206 will be considered separate survey units and divided into 1 m2 grids encompassing the affected areas as a single survey unit. See Tables 4.4, 4.5 and 4.6.
Table 4.4
Shelter 204 Control Room (Cr) Survey Units
Reference Figure 5A
|
Descriptor |
NW |
SW |
NE |
SE |
|
204CR-1 |
120 |
3 |
118 |
1 |
|
204CR-2 |
144 |
129 |
142 |
127 |
|
204CR-3 |
126 |
9 |
124 |
7 |
|
204CR-4 |
145 |
187 |
147 |
189 |
Table 4.5
Shelter 204 Launch Room (LR) Survey Units
Reference Figure 5B
|
Descriptor |
NW |
SW |
NE |
SE |
|
204LR-1 |
EW-37 |
EW-1 |
EW-38 |
EW-2 |
|
204LR-2 |
FL-71 |
FL-01 |
FL-77 |
FL-07 |
|
204LR-3 |
WW-38 |
WW-2 |
WW-37 |
WW-1 |
|
204LR-4 |
ND-14 |
FL-84 |
ND-8 |
FL-78 |
|
