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GENESIS ENGINEERING&REDEVELOPMENT The monitoring wells will be constructed of 2-inch diameter, schedule 40,poly vinyl chloride ("PVC")casing, and machine slotted 0.010-inch screen at the bottom. A 10-foot long(or shorter)well screen will be installed across the water-bearing zone. The annular space around the well screen will be backfilled with clean, Monterey sand by placing the sand through the augers as they are removed from the boring. The well will then be surged to settle the sand pack prior to sealing the annular space. Additional sand will be added as needed to ensure the sand pack extends to at least 2 feet above the top of the well screen. At least 2 feet of hydrated bentonite will be placed above the sand pack. The remaining annular space will be sealed with cement grout or bentonite. The wells will be completed either above or at grade, as appropriate depending on their location. At-grade wells will be protected by a traffic-rated monitoring well vault with a watertight lid. The groundwater monitoring wells will be developed at least 24 hours after installation. Development will consist of surging and pumping until the water is relatively sediment free and specific parameters(temperature,pH, and specific conductance)have stabilized. Groundwater samples will be collected from the new monitoring wells approximately 72 hours after the wells have been developed. f Soil cuttings generated during drilling activities will be monitored with an organic vapor monitor as part of the air monitoring/sampling program described in the Project's Health and Safety Plan. Soil cuttings will be placed in 55-gallon drums, labeled, and moved to a common drum staging area. 2.2.3 Subsurface Logging The Site geologist will log the subsurface conditions encountered in the reconnaissance borings; recording the information on a Drilling Log Form. Borings shall be logged as follows: • Descriptions of the soils will be in accordance with the Unified Soil Classification System(USCS) (ASTM D2488),with color descriptions made using a Munsell Color Chart • Soil descriptions follow the name of the predominant particle size • Percentages of the predominant and secondary sizes shall be estimated Additional information that will be entered on the Drilling Log Form includes: • Boring identification • Location in relation to an easily identifiable landmark ( • Name of drilling contractor William DePaoli Property 3 of 15 Sampling and Analysis Plan June 2009