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` KLEINFELDER P-L On August 23, 2004, a representative of our firm obtained samples of groundwater from the property using clean procedures om e head of the domestic well located near the residence. A permit for the well was not on file with SJCEHD, and details of the well construction are not known to us at this time. The samples were delivered to the laboratory on ice the following day using chain-of-custody procedures for DBCP and nitrate (N) testing. The results of the analysis indicate nitrate and DBCP were not present in detectable amounts. Copies of the test results and the chain-of-custody are attached. Based on a database search performed for the previously referenced surface/subsurface contamination report, no known contamination issues exist at or near the site. Details regarding the database search can be found in the referenced surface/subsurface contamination report. The potential exists for groundwater to be contaminated through the use of pesticides and herbicides. Details of known agricultural chemical use at the subject property can be found in ` the referenced surface/subsurface contamination report. Potential sources of nitrate include fertilizer that may be used in the area, as well as septic usage of the on-site and nearby single- family residences. 5. SOIL PROFILE The subsurface conditions at the site were explored before noon on August 23, 2004, by drilling one boring in each proposed parcel to a depth of approximately 10 feet below existing grade. The borings were drilled using a Simco 2400 truck-mounted drill rig equipped with 4%- inch O.D. solid-stem auger. The borings were drilled adjacent to the percolation test holes, and approximate locations and dimensions from a reference point are presented on the site plan. Based on our findings, the subsurface soils encountered in boring B-1, located in Parcel A, consisted predominately of toplastic sandy silt to a depth of about 3 feet below the existing site grade, underlain by silty sand to a depth of about 4 feet. These soils were underlain by relatively"clean"sand to the maximum depth explored. The soils encountered in boring B-2, located in Parcel B, generally consisted of low to moderately plastic silt to sandy silt to a depth of about 5 feet below the existing ground surface. These soils were underlain by interbedded strata of relatively clean sand, silty sand, and low- plastic silt to the maximum depth of the boring. In boring B-3, located in Parcel C, the soils encountered consisted predominately of low to .. moderately plastic silt to sandy silt to a depth of about 8 feet below the existing site grade. These soils were underlain by silty sand to the maximum depth explored. .. A more-detailed description of the subsurface conditions encountered during our field investigation are presented on the Logs of Borings, Plates 6 through 8. r. rr 48067.G01/ST04R1257 Page 3 of 8 ©2004 Kleinfelder,Inc. September 29,2004