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Kennedy/Jenks Consultants will be furnished with a traffic-rated monument set in a sloping concrete apron to facilitate surface drainage away from the well. After waiting a minimum of 48 hours to allow curing of the grout and concrete, the monitoring wells will be developed by surging, bailing, and pumping until the water removed from the wells is sediment-free or until no further improvement in water quality is observed. The wells will be allowed to recover for a minimum of 72 hours following well development, prior to monitoring and sampling. General procedures for well construction are presented in Kennedy/Jenks' Standard Operating Guideline—Well Construction and Development (Appendix B). The locations and well casing elevations of these new monitoring wells will be horizontally and vertically surveyed by a licensed land surveyor. The ground surface and top of well casing elevation will be surveyed to the nearest 0.01 foot relative to mean sea level using the National Geodetic Vertical Datum (NGVD 1988), relative to nearest benchmark at the Site. Horizontal locations of the new wells will also be surveyed to the nearest 0.1 foot relative to the California Coordinate system. 2.3 Collection and Analysis of Soil Samples Soil samples will be collected from each of the two locations during installation of the monitoring wells. To evaluate surface soil conditions, the uppermost soil sample will be collected from the 0 to 6 inches depth interval. Thereafter, soil samples will be collected at one-foot intervals to the bottom of the boring. Selected soil samples will be submitted for analysis of EC, pH, TKN, nitrate as N, ammonia as N, phosphate, potassium, sodium and chloride. Samples will be selected for chemical analysis based upon changes in lithology, relative depth and visual observations. Sample analysis will be performed on the saturated paste extract. A subset of the soil samples may also be analyzed for calcium, magnesium and percent organic matter. 2.4 Groundwater Sampling Initial sampling of groundwater will be conducted from the newly-installed monitoring wells no sooner than 72 hours after these wells have been developed, in accordance with Kennedy/Jenks' Standard Operating Guideline— Groundwater Sampling (Appendix C). Groundwater will be purged from the monitoring wells prior to sampling to acquire samples representative of aquifer conditions. The field parameters pH, temperature, and electrical conductivity will be monitored during purging to document stabilization of groundwater quality in accordance with Kennedy/Jenks' Standard Operating Guideline— Field Measurement of pH, Temperature, and Conductivity (Appendix D). Field parameters will be recorded on a groundwater purge and sample form. Groundwater samples will be collected into appropriate containers provided by the analytical laboratory using a new disposable bailer or a positive displacement pump. One duplicate sample will be collected during each sampling event. Following collection, the samples will be labeled and placed into a chilled container held at four degrees Celsius. The samples will be submitted in the chilled container to a state-certified analytical laboratory using chain-of-custody procedures to document the sample handling process. The groundwater samples will be analyzed for the Preliminary Work Plan for Evaluation of Nitrogen in Groundwater Page 5 Musco Family Olive Company, Tracy, California g:la mupladminjob1021020104,00_moacaoNe`A prts qen w pbnWxtdw