Percent Volume Definition. Note that volume percent is relative to volume of solution, not volume of solvent. For example, wine is about 12% v/v ethanol. This means there are 12 ml ethanol for every 100 ml of wine. It is important to realize liquid and gas volumes are not necessarily additive.
However, both the material condition and safety of DoD equipment are routinely being undermined by the effects of corrosion. The dollar cost of corrosion to DoD has been estimated by the Government Accountability Office (GAO) to be $10-20 billion per year.
Greg Kapitan says: Liza, the cost to upgrade to a stain-guard roof is in the range of $5.00 to $10.00 per square. So having said that, letâs say your roof is a 30 square roof, 30 X $10.00 = a $300 up charge to not have your roofing shingles show up with those dark and unwanted streaks after a few years.