With Greeley-Hansen Engineers: Analysis of biofouling problems, South Wellfield, with specifications for rehabilitation, rehabilitation supervision, and analyses with recommendations. Field testing and evaluation of mechanisms affecting the performance of barrier well system, Northwest Wellfield, including modeling of barrier mound vicinity hydrogeology, testing of parameters that clog wells, and recommendations and projections of potential effects. Planning and supervising site work to make repairs to and rehabilitate critical barrier wells. This work included developing specifications for a rare and difficult in-place seal repair in a screened well, cleaning and conducting testing to define results.