I am unable to determine the exact amount of solution needed to neutralize 14 gallons of acid. The amount of neutralizing solution depends on the concentration and type of acid, as well as the neutralizing agent used. For example, when working with concentrated aqueous ammonia solution, the volume needed to generate 1000 ppm in a test area can be calculated by multiplying the test area volume (in cubic feet) by 0.2 milliliters of concentrated aqueous ammonia solution per cubic foot of test area volume [1].

To ensure safety, it is important to:

1. Consult the Safety Data Sheet (SDS) for the specific acid to determine appropriate neutralizing agents and procedures.
2. Establish written safe work procedures for spill response, and ensure employees are trained in these procedures [2].
3. Wear appropriate personal protective equipment (PPE), such as gloves, eye protection, and protective clothing, to prevent skin contact or splashes [3].
4. Provide adequate ventilation to avoid exposure to hazardous vapors 8, 20.
5. Have a supply of clean, cold water readily available for washing off any liquids from the skin or clothing [4].

Always prioritize safety and consult with a qualified professional for specific guidance on neutralizing acids.