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P VERS NEIL O. O ,,,fRSON & ASSOCIATES, INC. %%W4 <br /> \ GEOTECHMCAL•ENVIRONMENTAL•INSPECTIONS•TESt ING•LABORATORY SERVICES <br /> y SACRAMENTO OFFICE CORPORATE OFFICE <br /> Z w/ 4229 Northgate Boulevard,Suite 3 22 Houston Lane <br /> p A/ allCO (530)89"3M Sacramento,California 95834 Lodi,California 95240 <br /> I <br /> �P STOCKION (2N)4T-1091 (916)929-9267 (209)367-3701 <br /> SS o G a.weao CoanovA (916)631- 55 FAX:(916)929-9269 FAX:(209)333-8303 <br /> December 2, 2002 <br /> Our Job Number: LG02-487 <br /> Mr. Brian Rogers <br /> 1352 Theresa Avenue <br /> Campbell, CA 95008 <br /> Subject: Engineered Septic System Design <br /> Proposed 2 Bedroom Second Dwelling Unit <br /> 82.6-Acre,Parcel 4, 18333 East Liberty Road <br /> Dear Mr. Rogers, <br /> Per your request, our office has completed an engineered septic system design for a <br /> proposed two (2)bedroom Second Dwelling Unit(SDU) to be built next to a new residence. The <br /> site is Parcel No. 4 of the Minor Subdivision Application No. PA 020055, consisting of 82.6 <br /> acres. The address of new Parcel No. 4 is unknown at this time. The address of the original <br /> undivided parcel is 18333 East Liberty Road, Acampo, California. <br /> Five(5)percolation tests have been performed on Parcel No. 4 by our office as part of a <br /> Soil Suitability Study for the subject minor subdivision. Three(3) percolation tests were <br /> performed within the proposed area of the SDU disposal field. The other two (2) percolation <br /> tests were performed within an area for the main residence primary septic disposal field. Due to <br /> the slow percolation rates encountered in the area, an engineered septic system design was <br /> provided for the primary residence. The engineered system for the primary residence was <br /> required to be doubled in size by San Joaquin County Environmental Health Department. <br /> We understand that you met with an inspector at the counter of San Joaquin County <br /> Environmental Health Department, Stockton,to discuss the requirements for a septic system for <br /> the SDU. One of the options provided to you by the front counter of the Health Department was <br /> an engineered septic system consisting of a minimum of three(3) 95-foot leach lines with <br /> seepage pits. You have indicated that an engineered septic system design is your preference. <br /> This letter provides the calculations and system drawings for an engineered septic system for the <br /> SDU which will be composed of two (2)bedrooms. <br /> I. Percolation Tests <br /> A total of five(5)percolation tests had been conducted near the proposed home site and <br /> SDU site as part of the Soil Suitability Study dated May 21, 2002. The depths of the percolation <br /> test holes ranged between 3 to 14.5 feet. As mentioned previously, three(3)percolation test holes <br /> were tested in an area which is now the location of the proposed SDU disposal field. Two <br />