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lb �'� KLEINFELDER For the purpose of our nitrate loading calculation we have estimated the average � waste/sewage flow per week for the project site as follows: 290 person seating capacity x 10 gal/person x%2-days) + (50 people/-week x 10 gal/person) + (300 gallday for L 8 400 allweek existing home x 7 days) 3. PRESENT AND PAST USE The majority of the r ,, ..J--f- I y project site Is currently In the grading phase�of construction with the existing single-family residence located at the northeast corner of the property. No other structures are known to have existed on the parcel at this time. Based on a historical aerial photograph review and a review of USGS maps, it appears that,the site has consisted of a fallow field area and the existing residential structure for many t years. We saw no evidence that the site has been used as a dairy. We know of no other past uses of the site at this time. F1 4. SEPTIC PERMITS AND PERFORMANCE SSS SJCEHD fil re searched to identify septic permits atm rc ss in the project vicinity. �� There wer Jnoermits on file for the subject parce even (7)ppermits were reviewed for parcels� ed adjacent to or near the subjectp�perty!—These permits were for new installations and repairs/additions to existing septic systems. The permitted AD , sewage disposal systems were for conventional septiclleach�,-f-isyste sr A' summary of information obtained from the permits is presented i n Plate , an copies of the permits are attached. �� 5. FIELD INVESTIGATION In order to evaluate the subsurface conditions at the project site on May 17 2006 n p 1 y , o e soil profile boring was drilled within the proposed leach field area to a depth of about V5 15 feet below existing site grade. The boring was drilled using a Simco 2400 truck- l -x mounted drill rig equip ed. 6-inch O.D. solid-stem auger. The approximate boring location is presented n Plate2 A representative with our firm maintained a log of the 1 boring and visually ctprented dWthe soils encountered according to the Unified--Soil Classification System (slate 4). A ked a Log of Boring is presented oand the Lo of Borin isg g ates �1L5 Following completion of the soil profile boring, a percoion test h .e P-1 as drilled within the proposed leach field area at a depth of abou 3.2 feet-be�o, grade. The approximate percolation test hole location is present( Plate 2. Following drilling, the sides of the test hole was scored, and significant loose rnate�was removed from h the 4ottpm of the hole. The percolation.test hole was then prepared; y 'rst placing F1 abo t 2 i rhes of fine gravel at the bottom of the hole and installing a 4-in diameter, 71324.G0115T06R648 June 19,2006 O 2006 Kleinfelder,Inc. Page 2 of 8