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The percolation rate determination for the deep(19.85')percolation test hole, DPH I, shown on the Percolation Test Details sheet for Parcel 1 as 120 minutes per inch needs to be revised to 125 minutes per inch. The 125 minutes per inch percolation rate is based on precise measurements instead of using rounded-off measurements,which the 120 minutes per inch rate is based on. The section Recommendations on page 7 is to be replaced in its entirety as follows: Reeonnnen lations: Mike Huggins,Representative of the San Joaquin Environmental Health Department has determined that leach fields are acceptable septic system installations for Parce7s-3—an—dTe—x-c—e—prffi—at—th—e—m—ini—m—u—m—us—aMe—&s-p—osaI areas and the number of leach lines are to be double the amounts normally installed. Parcels 3 and 4 shall have 16,000 square feet minimum usa a +sposaareas and a number of leach lines to be constructed are to be double the amount normally installed for the number of bedrooms planned. Caution should also be exercised in locating the septic systems in the same places where the shallow percolation tests were conducted on Parcels 3 and 4 as shown on the Percolation Test Hole Location Map. Also The San Joaquin County Environmental Health Department will need to be consulted to establish the appropriate elevation of the sewage outlet connection on any future house constructed at any future time. Find additional percolation testing needed in a to locate the appropriate soil for detennmmg a type and location of septic systems to be installed within Parcel 3 and 4 boundaries in the future. Also the Minimum Usable Disposal Area(Square Feet) columns on the cover page of my Soil Suitability Study, dated May 27,2003 as well as under the Test Results: section on page 6 need to be revised for Parcels 1 and 2 to read Dble. Amt. Lines and Disposal area instead of the listed Dble. Amt. Lines/pits. *ka Walter E. Curtis Civil Engineer C.E. # 11584