sule 66fact, in July 1966, when Rule 66 was adopted, some 600 tons per day of organic solvents were being discharged into the County's atmosphere, representing one-fifth of the total organicRule 66.1: Application of the Civil Procedure Rules: Rule 66.2: Action on behalf of the Crown: Rule 66.3: Counterclaims, other additional claims, and set-off: Rule 66.4: