TABLE 1-1 Inventory of the Chemical Weapons in the Blue Grass Army Depot Stockpile

Item

Fill

Quantity

Agent per Munition (lb)

Total Agent (tons, rounded)

Energetics

Energetics Weight per Munition (lb)

Total Energetics Weight (tons, rounded)

155-mm projectile, M110

H

15,492

11.7

91

Tetrytol

0.41

3

8-inch projectile, M426

GB

3,977

14.4

29

None

 

 

115-mm rocket, M55

GB

51,716

10.7

277

Composition B

3.2

74

 

 

 

 

 

M28 propellant

19.1

449

115-mm rocket warhead, M56

GB

24

10.7

0.13

Composition B

3.2

0.035

155-mm projectile, M121/A1

VX

12,816

6

38

None

 

 

115-mm rocket, M55

VX

17,733

10.1

89

Composition B

3.2

26

 

 

 

 

 

M28 propellant

19.1

154

115-mm rocket warhead, M56

VX

6

10.1

0.03

Composition B

3.2

0.0086

SOURCE: Data adapted from the Munition Items Disposition Action System (MIDAS), provided to the Program Manager for Assembled Chemical Weapons Assessment by the MIDAS team, July 1997.

treat the hydrolysates from the mustard agent and the energetic materials. At BGCAPP, the Army selected supercritical water oxidation (SCWO) to treat the hydrolysate.

Contracts to design, build, operate, and close both facilities were awarded to Bechtel International teamed with Parsons Engineering. For PCAPP, Parsons is a subcontractor to Bechtel. For BGCAPP, Bechtel and Parsons formed a joint venture and are teamed as prime contractors. This team is frequently referred to as the Bechtel Parsons Blue Grass Team (BPBGT). The contractors tailored the specific design of each of the two facilities to the respective content of each site’s stockpile. The original processes are described in two reports from the National Research Council (NRC) (NRC, 2005a,b), but these processes have since been modified and downsized because off-site disposal is now being used to dispose of noncontaminated waste. A simplified process flow diagram showing the feed streams for BGCAPP is provided in Figure 1-1.

THE BGCAPP DESIGN AND THE METAL PARTS TREATER

The stockpile at BGAD consists only of rockets and projectiles. All munitions are stored on pallets in igloos, which

TABLE 1-2 Pueblo Chemical Depot Chemical Weapons Stockpile of HD- or HT-filled Munitions

Munition Type

Model No.

Chemical Fill

Energetics

Configuration

Number

105-mm cartridge

M60

1.4 kg HD

Burster: 0.12 kg tetrytol

Fuze: M51A5

Propellant: M1

Unreconfigured: semi-fixed, complete projectile: includes fuze, burster. Propellant loaded in cartridge. Cartridges packed two per wooden box.

28,376

105-mm cartridge

M60

1.4 kg HD

0.12 kg tetrytol

Reconfigured. Includes burster and nose plug, but no propellant fuze. Repacked on pallets.

355,043

155-mm projectile

M110

5.3 kg HD

0.19 kg tetrytol

Includes lifting plug and burster but no fuze. On pallets.

266,492

155-mm projectile

M104

5.3 kg HD

0.19 kg tetrytol

Includes lifting plug and burster but no fuze. On pallets.

33,062

4.2-inch mortar

M2A1

2.7 kg HD

0.064 kg tetrytol

Propellant: M6

Includes propellant and ignition cartridge in a box.

76,722

4.2-inch mortar

M2

2.6 kg HT

0.064 kg tetrytol

Propellant: M8

Includes propellant and ignition cartridge in a box.

20,384

SOURCE: Adapted from U.S. Army, 2004.



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