Hello. I have an existing Well, with a 6 inch casing, and is 200 feet deep. The water level has dropped 25 to 30 feet in the last 35 years. I have added as much drop pipe as I can, without pumping sand. My question is, Can a 6 inch cased Well be extended?, and if so, would it fall under a different permit guidline such as (repair), to eliminate any new grouting, and New Well Permit?