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DEPTH OF WATER TABLE: <br /> AVERAGE NATURAL GROUND ELEVATION = 95 <br /> AVERAGE WATER TABLE ELEVATION = -27 <br /> DEPTH TO WATER TABLE = 122 <br /> GRADIENT OF WATER TABLE: <br /> UP STREAM ELEVATION = -24 <br /> DOWN STREAM ELEVATION = -30 <br /> DISTANCE BETWEEN CURVES = 2120 <br /> (-24) - (-30 ) <br /> ------------- = 0 . 28% <br /> 2120 <br /> DIRECTION OF GRADIENT : NORTHWESTERLY <br /> HISTORY OF PAST USES IN PROJECT AREA: <br /> THE PAST AND CURRENT USE OF THE PROJECT SITE AND THE AREAS SURROUNDING <br /> IT IS AGRICULTURAL . <br /> INTENSITY AND EXTENT OF PROPOSED DEVELOPMENT: <br /> THE OWNER IS SUBDIVIDING A 6 . 8 ACRE HOMESITE PARCEL FROM A 75 . 7 ACRE <br /> PARCEL LEAVING THE REMAINDER TO BE 68 . 9 ACRES . THE HOMESITE PARCEL HAS <br /> A HOUSE AND TWO AGRICULTURAL SHEDS AND IS SERVED BY A DOMESTIC AND AN <br /> IRRIGATION WELL AS WELL AS AN OPERATING SEPTIC SYSTEM. THE REMAINDER <br /> PARCEL ONLY HAS AN IRRIGATION WELL WITH NO OTHER STRUCTURES. <br /> ENGINEER' S OPINION OF SOIL SUITABILITY: <br /> A PERCOLATION TEST AT A DEPTH OF 3 FEET WAS PERFORMED ON BOTH PARCELS . <br /> NEITHER OF THE TESTS PASSED (SEE SHEET 2 ) . IT IS GENERAL KNOWLEDGE <br /> THAT THE SOIL IN THE AREA EAST OF JACK TONE ROAD HAS LOW PERMEABILITY <br /> AS IS SHOWN BY THE TESTS PERFORMED. A STUDY OF THE EXISTING SEPTIC <br /> SYSTEMS IN THE IMMEDIATE AREA THAT HAVE BEEN CONSTRUCTED SINCE 1950, <br /> INDICATES THAT ALL SEPTIC SYSTEMS UTILIZED EITHER PITS OR SUMPS IN <br /> ADDITION TO THE LEACH LINES BECAUSE OF THE LOW PERMEABILITY . THESE <br /> SYSTEMS HAVE BEEN OPERATING SATISFACTORILY. <br /> FROM THE INFORMATION CONTAINED HEREIN, WE RECOMMEND THAT ANY FUTURE <br /> SEPTIC SYSTEMS CONSTRUCTED ON EITHER PARCEL HAVE A 12 , 000 SQUARE FOOT <br /> LEACH FIELD AREA WITH EITHER PITS OR SUMPS REQUIRED AND THAT THIS TYPE <br /> OF CONSTRUCTION SHOULD WORK ADEQUATELY AND NOT ADVERSELY AFFECT THE <br /> QUALITY OF THE GROUND WATER. <br /> SHEET 1 <br />