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Additional Groundwater and Agriculture Drain Monitoring Work Plan Residential Neighborhood G April 18,2005 Page 7 5.4 LABORATORY ANALYSIS Samples collected from agricultural drain monitor points will be analyzed for total coliform, ammonia as nitrogen,nitrate as nitrogen, total nitrogen,electrical conductivity, and biological oxygen demand. 6.0 ADDITIONAL SOIL SAMPLING 6.1 SOIL SAMPLING LOCATION IDENTIFICATION Eight soil samples will be collected, one surface sample and one sample one foot below the surface at four different locations in the wastewater application area. Approximate soil sample locations are shown on Figure 2. 6.2 SAMPLING FREQUENCY Soil sampling will be conducted annually prior to the irrigation season, beginning in the Spring of 2006. The soil sampling event will be coordinated with and conducted at the same time as the soil monitoring for the existing reclamation areas. 6.3 SAMPLING PROCEDURE The surface soil samples will be collected by loosening the soil with a stainless steel shovel. A stainless steel spoon will be used to place loose soil into laboratory-supplied glass jars. The deeper soil samples will be collected using the same procedure or using a stainless steel hand auger and transferring the soil directly from the hand auger into laboratory-supplied glass jars. Each jar will be labeled for sample identification and placed in a cooler chilled with ice. The stainless steel shovel, stainless steel spoon, and stainless steel hand auger will be decontaminated in the field with a solution of laboratory-grade, non- phosphate detergent and deicnized water, and rinsed with deionized water prior to the collection of each individual sample. The soil samples will be delivered in coolers chilled with ice under chain-of-custody procedures to a certified laboratory. 6.4 LABORATORY ANALYSIS The surface sample and the sample from a depth of one foot below ground surface at each location will be composited 2:1 and analyzed for pH, electrical conductivity, total nitrogen, and metals to include arsenic, cadmium, chromium, copper, lead,mercury, molybdenum,nickel, selenium, and zinc. 7.0 REPORTING A report with geologic logs and completion diagrams will be submitted to the MHCSD for transmittal to the Regional Board upon completion of construction work. Results of the water sampling will be tabulated in quarterly and annual monitoring reports and submitted to the MHCSD for transmittal to the Regional Board on the schedule specified in the MRP. 8.0 LIMITATIONS Condor developed the interpretations and conclusions presented herein in accordance with the generally accepted principles and practice in use at the time the work was performed. Water quality monitoring of any site is necessarily confined to selected locations and may change with time. Conditions may, and often do,vary between and around these locations. Condor has endeavored to determine as much as practical about the site using conventional practices given our scope.of services. Conclusions presented in this work plan are professional opinions based on limited information obtained at the time of our site visits. If any changes are made or errors found in the ow1 IL CONDOR