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July 6, 2017 Monitoring Well Installation Workplan 3.4. Surface Seals Surface features will serve to prevent physical damage; prevent the entrance of surface water, pollutants, and contaminants; and prevent unauthorized access. The top of each monitoring well will be protected by a locking cover or equivalent level of protection to prevent unauthorized access. The top of the well casing will be sealed with a removable plug that provides a means to secure and lock the well. For CLSP-11, the sealed well-casing will be set in a flush mount monument (below ground completion) with a locking well cap (Figure 3a). For CLSP-12, the sealed well-casing will be set in a locking monument style well cover (above ground completion) that extends at least 2 feet above land surface (Figure 3b), surrounded by four protective bollards. Well Development HydroFocus personnel will develop the wells using surging, bailing, and pumping techniques. Well development will be performed with care so as to prevent damage to the well and any strata surrounding the well that serve to restrict the movement of poor quality water. A pump will be utilized to develop the wells no less than 48 hours after sanitary seal placement, per SJCEHD Well Standards. Well development will continue until the flowing water is visually clear (1.5 hour per well minimum development time) and pH, conductivity, temperature, and turbidity of purge water stabilize within plus or minus 10%; the volume of purge water shall be recorded on a standard well development form (see Appendix B for an example well development form). The development water and rinseate can be spread adjacent to the well construction site. Discharge of well development water to stormwater drains or surface water features is not acceptable. Well Survey The measurement point at the top of each well casing will be clearly marked, and the elevation of the measurement point and land surface determined using standard surveying methods. The vertical survey shall be reported to the nearest 0.01 foot referenced to the North American Vertical Datum of 1988 (NAVD 88). The elevation of land surface at the well will be reported to the nearest 0.1 foot (NAVD 88). Horizontal coordinates for mapping well locations shall be surveyed and reported to the nearest foot. Coordinates shall be in State Plane Coordinate System Zone 3 using North American Datum of 1983 (NAD 83). Surveying shall be conducted by a qualified surveyor licensed by the State of California. Well Sampling Newly constructed wells CLSP-11 and CLSP-12 shall be incorporated into the CTF monitoring network, and sampled for water levels and water quality in accordance with MRP R5-2016-0028. The first sampling event shall be conducted no sooner than 30 days after the Monitoring Well Installation Report is submitted to the Regional Water Quality HydroFocus, Inc. 7