 An irrigation water sample contains 4 meq/L of base.
 The acid to be used is 93% sulfuric.
 How much acid needs to be injected for each 100 gallons of irrigation water applied?
 The factor for 93% sulfuric acid is 8.7.
 4 meq/L x 8.7 = 34.8.
 Therefore, need to inject 34.8 mL (1.2 oz) acid per 100 gallons of irrigation water.
