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• Groundwater depth was measured in a backhoe test pit in a location adjacent to the proposed t ' effluent disposal area and found to even feet below gra on April 16, 2008. Consequently, the .'.five-foot separation distance betwe ii ilreffluen�tin face of the mound surface, which will basically be the native surface soil,and the water table depth, will be theoretically be maintained 'during this time of any'given year. • The new, on-site well was air-purged and developed, and then sampled for applicable constituents for a Transient-Non Community Water System in accordance with the request of Mike Huggins, R.E.H.S. of EHD. • From the area available for effluent disposal around the existing schoolhouse, it has been determined that the primary disposal area and the required 100%reserve/replacement/addition area can be situated the east and to the north, respectively,of this structure, and be completely situated on property owned by Bullfrog Landing Marina,LLC. • Although ultimate wastewater flow volumes emanating from the completed project are unknown, the average daily flow (ADF) volume was formulated using all available parameters acceptable to EHD. Average daily flow volumes of domestic sewage are expected to be comparatively small, even after the anticipated future opening of the kitchen/bar because the owners/operators of the g"L'a -:Bullfronding Marina will restrict water flows from all sources`to the greatest extent possible. This will be accomplished with low'-flow fixtures and spring-loaded sink faucets.`The owners/operators of the Bullfrog Marina have agreed to handle all food, food wastes, food by- products and organic matter as solid wastes and disposed of in the on-site dumpster for landfill disposal. In addition,Jeff Carruesco,R.E.H.S. of EHD Unit I has stated he'will require an"under the-sink's' grease trap for the food preparation.area. In summary, the soils testing and investigation has found the indigenous soils under the proposed domestic _ (� wastewater disposal area to contain a peat soil down to the water table with slow infiltration and 1 permeability(percolation) characteristics after the soil becomes saturated, thus creating the requirement of a mound disposal system. Permeability slightly increases when the peat soils are not saturated. Based upon the fact that the existing schoolhouse structure operated with a septic system servicing toilets, urinals, showers and a kitchen, the peat soils must have managed the effluent inflows from this structure when it was a schoolhouse, and later when it became a labor camp. Both uses of this structure would have created substantial wastewater flow volumes. In addition, the peat surface soils obviously allow water infiltration l�'J from rainfall. This was observed on February 2, 2009 whereby significant rainfall (2+ inches) had occurred �) the previous three days. On this date, the soil was stable and dry enough to easily walk on, indicating a surprisingly high infiltration and percolation potential. i Under EHD requirements and regulations, a mound system for effluent disposal is required in this locale due to the peat soils and high groundwater table. A duplex pump arrangement, with a flow meter, will alternate (. pumping to pressure-dose effluent and distribute it equally through the mound basal area. The mound system is described in detail on Pages 15 of this Report. II. SOIL SUITABILITY STUDY FINDINGS A. SUBJECT PROPERTY AND SURROUNDING STUDY AREA INFORMATION l�SSS§ I.I. The project is located within the San Joaquin Delta, approximately eight miles from the intersection of Bacon Island Road and Highway 4. t a 2 1 Chesney Consulting