The 1900L Series of near surface samoling allows one to quickly pull and pore water sample from within 6in to 6ft with ease. It provides the most economical way to capture large volumes of pore water quickly. Simply auger a hole, provide a silica sand interface around the cup, place a bit of bentonite sealing compound above the cup insertion and back fill with a near surface bentonite seal. You can be sampling in less than an hour.