Our desire to fit a gunite pool in the back yard entailed an assessment of the septic system. We needed to determine the make-up and location of the Cess and it's Overflow pools to learn whether they could simply be moved or would need an upgrade and a move. At first, we were told that we would need Health Department approval to move a cesspool and install a swimming pool. (in this case, an 8x10 ft. "plunge pool".) Fortunately, this information was incorrect; we only needed a certified septic tank company to perform the work within Sag Harbor Village code, assuming that we had adequate space for all of the setback and footprint requirements. Once we determined that we did have room, our septic tank guys dug up the lawn to further their due diligence.