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INTRODUCTION Chesney Consulting has been retained by Mr. Patrick Nahigian and Mr. Richard Sarris of Adelfos Partners to conduct three investigative and reporting Phases for their proposed project. This document is Phase I, which is described on the cover page, and will be incorporated into the Nitrate Loading and Soil Suitability Studies Report required by the San Joaquin County Environmental Health Department (END). Phase II will be the design Phase of the wastewater management system that will be based upon the findings of the testing and analysis described in this Report. Phase III will be the incorporation of all data, findings and design criteria into the two EHD Studies,under their format. It will be many years, if not decades, before City of Stockton sewer will be installed to serve this area. Consequently,this property and surrounding properties must operate with decentralized wastewater management systems, commonly referred to as septic systems. This project consists of improving the septic system for the existing Omelet House Restaurant and the construction of an ARCO gasoline service station on the property. Wastewater effluent from both facilities will ultimately be commingled for treatment and disposal to the soil environment in the leachfield disposal area. This disposal area has been delineated by the engineering firm of Barghausen Consulting Engineers of Kent, WA and is illustrated on the attached Site Plan. Consequently, all soil characterization and soil testing occurred in this area. The primary objectives of the testing and analysis program were to quantify optimum performance,maximum system longevity, and environmental protection. MATERIALS AND METHODS Effluent Disposal Area Soil Testing The testing and analysis program began with the assessment of the effluent receiving soils in the first designated leachfield location. This location was subsequently changed as described in the Phase III Report. Determination of the soil characteristics for the management of effluent emanating from the completed project is one of the most important criteria for this project to be successful. Fortunately,the soils were found to possess favorable permeability with increasing soil depth. If it had been determined that the receiving soils possessed slow-to-extremely slow permeability,the project would have required severe modifications. After the leachfield disposal site had been USA surveyed, a B-24 drill rig with five-ft auger extensions was used to bore several borings to different depths to retrieve soil samples and drill percolation test borings. Table 1 below illustrates the primary chemical and physical soil data obtained from the analytical testing procedures. Soil grab samples were obtained from specific depths of 1.0 ft, 2.0 ft, 3.5 ft and 5.0 ft. Samples from interval depths of 5 ft to 10 ft, 10 ft to 15 ft, 15 ft to 20 ft and 20 ft to 25 ft were retrieved as composite samples from the five-ft length auger cuttings. After boring completion, all soil samples were taken to A&L Labs for analysis under the attached Chain of Custody. Page 1 of 7 Chesney Consulting