In response to questions from City Councilors about the proposal at a recent Land Use Committee meeting, Parks, Rec and Culture Commissioner Bob DeRebuis has written a letter endorsing Northland’s proposal to build a splash/spray park and explaining why he does not support a skating rink. While praising the health and developmental benefits for young children he also notes that Waltham has nine splash parks and Brookline has 14, with one more under construction.