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[4] Continued. An Exploratory Log of Boring was not performed on the subject 16m parcel since the groundwater is fairly shallow in this area. The groundwater will be discussed in the following section. The percolation tests conducted by Quality Control Inspection, Inc. ' were performed in accordance with Environmental Health Department regulations, under the observation of Mr. Hector Castro, Registered Sanitarian. Testing was truncated per Mr. Castro's recommendation liw since the data illustrated stable percolation rates. Although deep (8 feet) test borings were drilled on Parcel No. 1 and the DR, they were not tested due to the fine sandy soil structure encountered. The percolation rate obtained for the shallow test boring on the DR was calculated to be 30 minuteser inch. The p percolation rate on Parcel No. 1 was calculated at 5 min/in. It is important to note that the percolation testing performed on Parcel No. 1 was conducted in the leach field area of the proposed hw residential structure. t [5] LOCAL GROUNDWATER INFORMATION r The 1991 "Lines of Equal Depth of Water in Wells" ma q P p produced by t the San Joaquin County Flood Control and Water Conservation •- District indicates that the static water level is located at approximately 18 feet in the area of the subject property. The ,w groundwater flow according to the District maps appears to be towards the northeast, although many factors can influence this general groundwater directional flow. There are irrigation wells in the vicinity of the subject parcel which can be a primary factor �. in groundwater directional flow changes. t Nitrate and DBCP analyses were performed on the domestic well water that services the residence in the extreme northeast portion of the . DR. The results indicate a non--detect (ND) for DBCP, and a high L 3 � ��t �atify �onMpt Inspection