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kn KLEINFELDER Ten of the push probe borings were pneumatically advanced using a 4 foot steel core barrel. Soil samples were continuously collected by inserting a new four foot acetate liner into the core barrel prior to each drive. Soil samples obtained for potential chemical analyses were collected at desired intervals by removing the acetate liner and cutting out the desired 6-inch interval. Probe location PP-8 was advanced using a stainless steel hand auger. Soil samples were obtained by slide hammering a 2-inch diameter by 6-inch long stainless steel tube into the soil at the desired sampling depths at this location. The stainless steel tubes and acetate soil sample containers were then removed from the boring and sealed with Teflon° sheeting and tight-fitting plastic end caps. The stainless steel hand auger and down-hole pushprobe equipment was decontaminated between sample and probe locations with a Liquinox® (laboratory-grade detergent) and potable water wash and a distilled water rinse. New stainless steel tubes used in the hand auger location were used for sample collection were also decontaminated using the same methodology. Groundwater samples were obtained from eight of the eleven push probe borings (PPs-1, 3, 5, 6, 7, 8, 9, and 10). The groundwater samples were collected using a positive displacement check valve attached to new polypropylene tubing. The positive displacement was generated manually using a piston-like motion. New tubing was used at each sampling location. Slotted PVC was placed within each of the eight push probe boreholes to help decrease turbidity and facilitate collection of the groundwater sample. The groundwater samples were transferred into pre- cleaned laboratory grade bottles. 4.3 SAMPLE HANDLING AND CHEMICAL ANALYSES After collection, the soil and water samples were immediately stored in an iced cooler. The samples were transported under chain-of-custody control to Kleinfelder's office and then transported by courier in a sealed container to Sequoia Analytical Laboratories of Sacramento, California. Sequoia is certified by the California Department of Health Services to perform the requested analyses. A total of 22 soil samples and 8 groundwater samples were submitted for chemical analyses. One soil sample from boring PP-9, three from PP-11, and two soil samples from the remaining probe locations were submitted for analysis. One groundwater sample from each pushprobe boring, with the exception of PPs- 2, 4, and 11, were also submitted for analyses. The twenty-two soil samples and eight groundwater samples were analyzed for the following: • Ammonia as N by EPA Method 350.3 • Nitrate as N by EPA Method 300.0 • Total Kjeldahl Nitrogen by EPA Method 351.2 A illustration of the sampling locations is shown on Plate 2 and a summary of the soil'and groundwater sampling results is located in the attached Table 1. 43851.E01/ST05R158/DH:Iv Page 6 of 12 ©2005,Kleinfelder,Inc. February 9,2005