Page 54 - Materials Chemistry, Second Edition

Site Assessment and Remedial Investigation 37

2.3.1 Amount of Cuttings from Soil Boring
The cuttings from soil borings are often temporarily stored on site in
55-gallon drums before final disposal. It becomes necessary to estimate the
amount of cuttings and the number of drums needed. The calculation is rela-
tively straightforward and easy, as shown here.
To estimate the amount of cuttings from soil boring, the following proce-
dure can be used:

Step 1: Determine the diameter of the boring, d b.
Step 2: Determine the depth of the boring, h.
Step 3: Calculate the volume of the cuttings using the following formula:

Volume of cuttings = ∑   π b d 2   ()(fluffy factor)h (2.13)
 4 

Information needed for this calculation

• Diameter of each boring, d b
• Depth of each boring, h
• Soil fluffy factor

Example 2.20: Amount of Cuttings from Soil Boring
Four 10-in. boreholes are to be drilled to 50 ft below ground surface level for
installation of 4-in. groundwater monitoring wells. Estimate the amount of
soil cuttings and determine the number of 55-gallon drums needed to store
the cuttings.

Solution:
(a) Volume of cuttings from each boring
= [(π/4)(10/12) ](50)(1.2) = 32.7 ft 3
2
Volume of cuttings from all four borings
= (4)(32.7) = 131 ft 3
(b) Number of 55-gallon drums needed
= (131 ft )(7.48 gal/ft ) ÷ (55 gal/drum) = 17.8 drums
3
3
Answer: Eighteen 55-gallon drums needed.