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River Islands 6835.4.002.01 <br /> Pond E, Water Recycling Plant September 6, 2005 <br /> AUTHORIZATION REQUEST FOR MONITORING WELL Page 5 <br /> INSTALLATION AND GROUNDWATER STUDY <br /> To meet the requirements of the RWQCB, the project land surveyor will need to survey the well to <br /> establish horizontal coordinates and elevation data for the new well. Elevation data provided by the <br /> surveyor should include the top of well casing, the top of the concrete monument for the well, and <br /> the ground surface at the well. The surveyor should tic the survey of the well to the nearest <br /> documented benchmark to establish elevation control. Vertical survey shall be reported to the <br /> nearest 0.01 foot. Surveying of the well is not included in the scope of this proposal, but we would <br /> be glad to coordinate these services for you if requested. <br /> Our fee estimate was prepared with the expectation that the site and exploration locations are <br /> accessible by conventional truck-mounted drilling equipment. If rain, irrigation or other <br /> unforeseen access impediments are encountered, it may be necessary to use all-terrain track- <br /> mounted or balloon-tired equipment, which would significantly increase the cost of the planned <br /> exploration and well installation. <br /> AUTHORIZATION <br /> If you are in agreement with the scope and fees outlined herein, please sign and return both <br /> copies of the enclosed Professional Services Agreement as our authorization to proceed. A fully <br /> executed copy will be returned for your records. <br /> LIMITATIONS <br /> We will strive to perform our work in general conformance with the geotechnical engineering <br /> practice that exists within the Lathrop area at the time of our services. It should be noted that <br /> because of the natural variation of subsurface materials, the actual groundwater conditions across <br /> at the site might vary from the location explored and sampled. No warranties are expressed or <br /> implied. In the event that the character of the project changes, additional studies may be required. <br /> Approval of the site from regulatory agencies may require additional study than currently proposed. <br /> If you have any questions on any portion of the scope of services or any other aspect of the <br /> agreement, please call and we will be glad to discuss them with you. <br /> Sincerely, <br /> ENGEO Incorporated Reviewed by: <br /> Duncan R. Hickmott, CEG Zac Crawford <br /> Principal Staff Geologist <br /> drh/sc:prop <br /> Enclosure: Professional Services Agreement <br />