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` 141� .11 M K L E I N FE L DER One permit dated 1956 was for the installation of a septic system located in the area of the existing leach field. Pastor Kihlthau stated that the system was upgraded with a new septic tank and seepage pits in anticipation of adding restrooms to the system. This appears to have been performed under Permit Number 19935 in 1999. The existing septic system on the subject property has been functioning well according to Pastor Kihlthau. Based on the repair// 1 permits on file with SJCEHD, it appears that the septic system on the adjacent parcel has had 0 �) additional leach lines/seepage pits added. The reason for this addition is unknown. Also on file with SJCEHD was a permit (#011798) for the well located about 200 feet r southwest of the proposed new sewage disposal system. The well is reported to be 215 feet deep and composed of 6-inch diameter PVC casing with a grout seal that extends to a depth of /Y,-3 ` 100 feet and a gravel pack consisting of/4-inch gravel. The pump is set at a depth of 140 feet. l First water was reported in the 12-inch diameter well excavation at a depth of 100 feet. A copy of the permit is attached. 4. GROUNDWATER During the time of our investigation, groundwater was not encountered. Lines of Equal Depth to Groundwater contour maps published in groundwater reports by the San Joaquin County 6. Flood Control and Water Conservation District (SJCFC&WCD) show groundwater levels in �2.1) the project area ranging from about 50 to 80 feet below ground surface from Spring 1981 to Spring 1999. Based on Equal Elevation of Groundwater maps also produced by SJCFC&WCD, the general groundwater gradient is from east to west. Local gradient variations may be present due to well pumping. We do not know of any existing and/or potential groundwater contamination issues in the ti nrolect vLcnnty. There ara no e� mg�on�alnes adjacent to the property. Seasonal fertilization of the off-site agricultural land, if performed, is probably the largest contributor of ` nitrogen to groundwater in the project vicinity. We anticipate that septic system usage and l landscape fertilization, if any, would be the primary future on-site sources of nitrogen to soil and groundwater. 6. On November 17 and December 8, 2003, a representative of FGL Environmental obtained / samples of groundwater from the property using clean procedures from the existing well 6. located adjacent to the southeast corner of the church building. The samples were delivered to the laboratory on ice the same day using chain-of-custody procedures for DBCP and nitrate(N) testing. The results of the tests and a copy of the chain-of-custody are attached (Plates 16, 17, and 18). Groundwater pumped from the on-site well is currently used for purposes incidental to the ✓ church and school environment. We anticipate that the predominant use of groundwater will remain the same upon completion of Phase 1. i tk L 40141.G01/ST04R206 February 24,2004 _ 2004 Kleinfelder,Inc. Page 3 of 7