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46�ecv)ll NEIL O. ANDERSON & ASSOCIATES, INC. GEOTECHNICAL•ENVIRONMENTAL•GROUNDWATER•INSPECTIONS•TESTING•LABORATORY SERVICES CORPORATE OFFICE SACRAMENTO OFFICE 22 Houston Lane 4229 Northgate Boulevard,Suite 3 CHICO (530)891-6304 Lodi,California 95240 Sacramento,California 95834 STOCKTON (209)472-1091 (209)367-3701 (916)929-9267 RANCHO CORDOVA (916)631-4455 FAX:(209)333-8303 FAX:(916)929-9269 September 11, 2002 Our Project No. LG02-370 _ C) R �Y r%,) V/ Mr. Mike Smith rn —a — Mike Smith Engineering, Inc. .� 4 North Main Street , Lodi, CA 95240 r= W C7 m Subject: Percolation Test Frank Giannecchini Property co _ 13695 E. St. Rt. 26 HWY, Linden, California SA-01-05,APN 091-050-15 Dear Mr. Smith, Per your request, our office has completed the drilling of a shallow and deep percolation test boring on the subject property. A percolation test was a requirement for site approval by San Joaquin County Public Health Services, Environmental Health Division(SJC PHS-EHD) for a San Joaquin County Use Permit. The percolation tests were performed in accordance with the method prescribed by SJC PHS-EHD. The onsite drilling and percolation tests were conducted on the subject lot which is located on the north side of State Route Highway 26 in Linden, California(see Plate 1). This work was performed in an effort to establish the percolation rate of the soils within an area that could potentially be used for a septic field. On September 10, 2002, a 25-foot deep soil profile was drilled with a Mobile B-53 rig using a 6 inch hollow stem auger. The soils were found to consist of a reddish brown clayey sand from the surface to 15 feet in depth. Following the clayey sand was a brown silty sand to a depth of 20 feet. Below 20 feet was a silty sand with fine to medium gravel to a depth of 22 feet. From 22 feet to 25 feet was a brown sandy clay. Please refer to the soil boring log attached to this letter. The boring terminated at a depth of 25 feet and no ground water was encountered. Please refer to the soil log attached to this letter. The soil profile boring was converted into a deep percolation test hole set at a depth of 25 feet. Adjacent to the deep percolation hole, a 3 foot boring was drilled and completed into a shallow percolation test. Both boring were use for the percolation tests by first adding 2-inches of"pea gravel"to the bottom of each of each hole. Then, a 2" PVC pipe was placed to the bottom of each boring with PVC pipe extending up to the surface. Pea gravel was placed around the bottom of the PVC pipe to stabilize the side walls from caving and to prevent erosion while filling the borings. The percolation test holes were pre-soaked with 12 inches of water 24 hours .�•