Laserfiche WebLink
s <br /> File No. 20-3876-O1.G01 KLEINFELDER <br /> June 14, 1995 <br /> TABLE I <br /> PERCOLATION TESTS <br /> Test Depth Percolation <br /> No. Parcel (feet) Rate (mins/in) <br /> P-1 D 15 1'h <br /> P-2 C 4 24 <br /> P-3 B 24 3 <br /> P-4 A 9 > 1 <br /> Item d-3: <br /> "The depth and gradient of the water table;" <br /> During our field testing on May 30 and 31, 1995, we were not able to measure <br /> groundwater in the wells located on the Kolbo property. The most current <br /> regional groundwater depth map published by the San Joaquin County Flood <br /> Control and Water Conservation District, Plate II of this report, indicates the <br /> depth to groundwater in this area was approximately 75 to 80 feet in spring 1994. <br /> Based on the County requirements for a parcel split project such as this, we are <br /> not required to establish an on-site groundwater gradient by drilling borings. We <br /> are providing a general estimate of the groundwater gradient based on the most <br /> current groundwater map showing lines of equal elevation of groundwater, Plate <br /> III of this report. The map indicates that the groundwater gradient in spring 1994 <br /> was in the approximate northwest direction. <br /> We note that our scope of services did not include a detailed evaluation of the potential for the <br /> septic systems to affect the quality of the groundwater. However, the project involves the <br /> possibility of only two additional septic systems for a total of four within the approximate 40-acre <br /> property. Therefore, with groundwater at approximately 75 to 80 feet deep, in our opinion the <br /> likelihood of a significant change in the nitrate level of the groundwater beneath the site, because <br /> of two additional septic systems, is very remote. If additional, more-concentrated development <br /> is planned in the area, we suggest that consideration be given to completing a nitrate loading <br /> study. <br /> This completes our scope of services at this time. Based on the above information, it is our <br /> opinion that the proposed parcels are suitable for septic system use. Any new or replacement <br /> septic systems should be located and any future wells should be constructed following County <br /> requirements. Continuous monitoring of the on-site septic systems should be maintained <br /> Copyright 1995 Kleinfelder, Inc. Page 3 of 4 <br />