Example 2: A tank with a reference height of 35' 10" has 27" 03" of product in it. Calculate how far into the tank you must lower your sampling equipment to take an upper, middle and lower sample.
Example 1: A tank with a reference height of 20.00 meters has 14 meters of product in it. Calculate how far into the tank you must lower your sampling equipment to take an upper, middle and lower sample.
2.9 Conclusion Sampling Only upper, middle and lower samples from the same tank can be composited in the field. All others must be composited in a laboratory. Never fill a sample container more than 85% full. Never decant a vapor pressure sample from one container to another. Sample transport All samples of hazardous materials must be transported in an approved Transportation Box. Never carry samples of hazardous materials in the passenger compartment of your vehicle.
Feet and inches Decimal feet
Meters
Reference height
35’ 10” 27’ 03” 12’ 07”
35.83 27.25 12.58
Reference height
20.00 14.00
Innage ( – ) Ullage ( = )
Innage ( – ) Ullage ( = )
6.00
Meters
Decimal feet
Ullage
6.00
Ullage
12.58 +4.54 17.12
1/6 innage 2.33 Ullage to obtain upper sample 8.33
1/6 innage
Ullage to obtain upper sample
Meters
Decimal feet
Ullage
12.58
Ullage
6.00
1/2 innage
+13.63
1/2 innage 7.00 Ullage to obtain middle sample 13.00
Ullage to obtain middle sample
26.21
Decimal feet
Meters
Ullage
12.58
Ullage
6.00
5/6 innage
+22.71
5/6 innage 11.67 Ullage to obtain lower sample 17.67
Ullage to obtain lower sample
35.29
30
Made with FlippingBook Digital Publishing Software