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- �'�, QITlity ontrol nspechon nc. ►QC1 o. O MAIN OFFICE QQ 1295 NORTH EMERALD,BLDG.Q-MODESTO,CALIFORNIA 95351 -PHONE:(209)527-4940 BRANCHES STOCKTON(209)466-6376 - MERCED(209)723-2425 DATE: July 30, 1999 QCI#: E-99-834 CLIENT: Mr. John Thoming 33600 South Koster Road Tracy, CA 95376 PROJECT: A portion of the northwest quarter of Section 28, Township 3 South, Range 6 East _ MDB&M. 151 Acres in the northeast corner of Vernalis Road and Koster Road. SUBJECT: Soil Suitability Study APPLICATION NUMBER: MS-98-7 [1] EXECUTIVE SUMMARY This Soil Suitability Study presents the results of our investigation concerning the soil strata and �. groundwater under the above-referenced subject property. The property is located in the northeast corner of Vernalis Road and Koster Road. Our study was done to determine if the site is acceptable for septic systems which will function properly and pose no adverse environmental _ impact to surface waters or to the underlying groundwater. This report is in compliance with the requirements of Development Title Section 9-1105.2 Item (d) of the San Joaquin County Development Title. [2] SUBJECT SITE AND STUDY AREA BACKGROUND INFORMATION The attached Parcel map illustrates the orientation of the two proposed Parcels. Parcel 1 will occupy the west half of the subject property and the Designated Remainder will occupy the east half. It is our understanding that there will be no additional improvements made to the parcels. The topography of the area is flat, therefore, septic system design for slopes will not have to be taken into consideration. The subject property is located 18 miles west of Modesto and nine miles southeast of the town of Tracy. The study area consists of predominately agricultural production land as row crops and orchards. Surrounding structures consist of very low density single family housing, ranches and ranchettes. Current zoning of the property is AG-40. A review of Application Permits on file with the San Joaquin County Environmental Health Department indicates there have been 13 Applications for Repairs/Additions in the regional study area. This is in the general locale of the intersection of Koster Road and Hwy 132. These applications for system modifications to existing septic systems were for additional drainage (leachlines), sumps and seepage pits. This can be considered a very high number of permits in - comparison to the low density housing and indicates the shallow soils in the area are not conducive for sewage effluent management over long periods of time. This is primarily attributed to the tight, silty soils at the leachline depth. Our reports and letters are submitted as the confidential property of our clients for their exclusive use.Any publication or reproduction of statements,conclusions or extracts from or regarding our reports or letters is reserved,contingent upon the written authorization of Quality Control Inspection,Inc.