Acting as the town’s permit authority, selectmen have again denied a Purchase Street campground owner’s request to rent 113 seasonal spaces. On Monday, despite owner Barbara Holton’s protests, board members asserted that both a judge and Middleborough health agent Jeanne Spalding have ruled that Tispaquin Family Campground’s lakeside septic services are not adequate for so many patrons. In a disagreement that spans well over a decade, Holton again stood before the five-member board last week and said she believes she is facing undeserved discrimination. “I have an issue because things have not gone well. You think Jeanne is not wrong,’’ she said, referring to health agent Spalding. “Well, sometimes she is.” Although Holton said she has installed the necessary hygiene system, selectmen were unanimous in rejecting the license request. Currently, Holton is allowed to have half the number of patrons she requested.