Site data which might affect, or be affected by, the proposed system, including but not limited to specifications regarding soil types, topography, depth to seasonal high groundwater, depth to impervious materials, depth to bedrock and distance to surface bodies of water. The determination of depth to seasonal high groundwater shall be made in the months of March, April, May or June, within six weeks of the time that the frost leaves the ground. All determinations shall be accompanied by a statement of the testing methods used as well as the basis for the determination.