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SUGGESTED WATER PROBLEM PROCEDURE When water is encountered in the ground during excavation of the pool,the foflowing procedure will enable you to divert this water temporarily and keep the area dry during construction. Once the installation is complete,ground water wili not disturb the pool because the internal hydrostatic pressure of the pool water is greater than that of the water beneath the pool. It is also advisabie to install a hard bottom instead of a sand bottom, thereby eliminating the possibility of a wash-out of the pool base. 1. Over-dig hopper bottom one to two feet and place tt2 crushed sione four to six yards depending on size of pool and severiry of wate�problem.) 2. If water is erupting from other areas such as the slopes or breakover, over dig these areas and place stone so that the water will drain to the hopper bottom. (Note: Be sure to dig enough to allow for the addition of two inches of pool base.) 3. Next, get enough length of pipe(1 7/2"diameter), so that you will be able to imbed one end into the stone in the hopper,while imbedding and running the rest of the pipe up the slope and under the panels to ground level. Note: Be sure the prpe end is located at the bottom of the stone bed. Instal I a 1 1/2"foot valve at the end of the pipe to be inserted into the stone.This will provide a screen and check valve. 4. Connect the pipe to a low head electric pump and leave the discharge line slightly elevated, so as not to lose prime.Turn it on and/eave it running until the pool is finished and is filled with water. Cap off the line and leave it for future use in liner replacement. POOL EXCAVATION Note: Remember that the pool will be dug 2 feet larger on all sides than its original dimensions.This allows room for erecting panels and placement of A-frames. Instruct your backhoe operator to excavate the width of his bucket (approxirnately 24")on the outside of the pool layout, to accommodate for this area.You may also outline this area with spray paint. Explain to the backhoe operator that the 24"shelf is located 44 1/2" below the bench mark(42" -height of the steel panels plus 2 1/2"-height of the receptor coping. Refer to Diagram A. DIAGRAM A ------- -------- BENCHMARK _ ——— —————————� �r �*K• c�uNo ortowo TOTOPpp TOBEMCM PIWEL � d�7¢' GROl1ND � TOBENCt1 GROVtMI TOIOVOF 71'SHiLF �K P�+EI 21'SNELF NOTE: All dimensions Include 2'fw overdig. This dagram has a 40'shallow end finlsh depth and an 6'deep end finish depth.