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r 7denot( d in the log of boring, the so' arac��r-_s cs erly ng-t-he-di \ al area down to three l the soil to be predomina ely a fine sandy silt with ome lean cla At the 36-inch depth, the top of a cemented silts hardpan exls s. ther-test�o ' g was drilled 75 feet to the east of this 36-inch test boring, to a depth of 42 inches. At the 42-inch depth, the bottom of this boring was t beginning to break through the hardpan, with the soil classified as a fine-to-medium sandy silt. PERC TION TESTING Th��two�pere � st borings were drilled on February 24, 2009. After drilling, the sidewalls were scored with afpry-bar and the loose material removed. Two inches of pea gravel was placed at the bottom-of-each boring to prevent scour and three-inch perforated PVC pipe was inserted in the test borings. The two perc test borings were pre-saturated on this day at 1130 hrs with 12 inches of clear water in accordance with EHD regulations. On February 25, 2009, 0900 hrs, percolation testing commenced for the two borings. No pre-soak water remained overnight in both test borings; therefore, EHD Test Procedure#2 was conducted. The last half hour of the tests was witnessed by Ted Tasiopoulos, R.E.H.S. of the San Joaquin County Environmental Health Department. The following Table summarizes the Parcel, septic / system structure to be installed based on depth of acceptable perc rates, Street Address/A.P.N. Number, post soak period status after 24 hrs and percolation test results at the perc test depth: TABLE I PERCOLATIONsTESTORESULTS TED:DATA LOT NUMBER AND ADDRESS PERC TEST DEPTHS: POST-SOAK PERC TEST SEPTIC SYSTEM SHALLOW PERIOD RESULTS STRUCTURE TO BE INSTALLED �A.P.N.NUMBER DEEP—� STATUS j ,r.---�--� Designated 26305 S.Austin Road 336 INCHES No Standing X19.2 min/in Remainde Manteca 366 _ �� Water in Hole Leachlines 257-210 42 INCHESNo Standing 10.0 min/in 1_ water in Hole CONCLUSIONS Acceptable percolation rates were achieved in both test borings representative of leachlines in the future effluent disposal area of Mr. Cunningham's home. According to depth-to-groundwater maps at EHD, the water table is approximately 20 feet below grade. Since the project is located in the "High Water Table Area" as denoted on the EHD map illustrating soil types and septic system requirements, EHD will require 100 feet of leachline for each bedroom within the new residential structure. k Page -2- Chesney Consulting '