Total Measured Quantity. Total measured quantity is the volume of product and BS&W in a tank at the
observed temperature of the product at the time of gaging. It is usually obtained from a tank's capacity
table or strapping chart.
Bottom Sediment and Water (BS&W). The amount of sediment and water measured in the bottom of a
Net Volume Uncorrected. The volume of product in a storage tank at the observed temperature.
Net Quantity at 60F. The net volume, uncorrected and converted to the equivalent volume at 60F.
Gaging Equipment. Items of gaging equipment are described below.
Innage Tape and Bob (refer to Fig. C-1). The steel innage tape is graduated to 1/8 inch, and the first
whole number on the tape is 9 or 10. Consequently, from the pointed tip of the conical bob to the first
number on the tape is 9 or 10 inches. From the tip of the bob to the top of the eyelet is 6.6 inches. The
bob is made of nonsparking metal, and "0" is at the bob's tip.
Fig. 4-5. Innage Tape and Bob
Outage Tape and Bob (refer to Fig. C-2). The steel outage tape is similar to the innage tape except that
the readings begin at the 2-inch level. The "0" reference is where the harness snap connects to the bob.
The rectangular bob is 6 inches long, but the 1/8-inch graduations start with the 6-inch mark at the
bottom and are read upward to 1 inch as the last whole number on the top. The outage bob has a flat
nose and is made of nonsparking metal.