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KLEINFELDER WELL ABANDONMENT WORK PLAN SAN JOAQUIN COUNTY GENERAL HOSPITAL FRENCH CAMP, CALIFORNIA 24-220152-000 September 23, 1992 INTRODUCTION Kleinfelder is pleased to present this work plan to San Joaquin County This work plan was developed after discussions with you and the San Joaquin County Department of Public Health, Environmental Health Division (SJCEHD), and is a preliminary understanding of San Joaquin County's desires Kleinfelder is committed to providing quality service to its clients, commensurate with their wants, needs and desired level of risk If a portion of this work plan does not meet the needs of San Joaquin County, or if those needs have changed, Kleinfelder will consider appropriate modifications, subject to the standards of care to which we adhere as professionals Modifications such as changes in scope, methodology, scheduling, and contract terns may result in changes to the risks assumed by San Joaquin County, as well as adjustments to our fees. San Joaquin County Capital Projects (SJCCP) is administering the construction activities at the French Camp Hospital As part of the new construction, San Joaquin County wants to remove the water tower and destroy the supply well beneath the water tower. In August 1992, SJCCP requested a proposal from Kleinfelder to abandon the supply well Insufficient information was available to develop a procedure to properly abandon the well • To supply additional information, a down-hole video survey of the well was conducted by Layne-Western on September 8, 1992 (copy attached). The survey indicated that approximately 2 feet of turbine oil is floating on top of the water which is at a depth of approximately 44 feet Casing extended to a depth of approximately 174 feet Open hole was encountered from 174 feet to the total depth of 196 feet The bore-hole was reasonably intact from 174 feet to approximately 192 feet, but was washed out beyond the ability of the camera to view the sidewalls from 192 feet to 196 feet. In addition, the well casing was measured at the surface at 14-314 inch x 112 inch wall Furthermore, Mr. Steve Keeter (SJCCP) contacted the original installer of the well Clarke Drilling reported that the well was installed in 1924 with a surface seal to a depth of 80 feet Based on this information, SJCEHD has requested that a water sample be analyzed for petroleum hydrocarbons, and that the well casing be perforated below the surface grout seal. SCOPE OF SERVICES Kleinfelder has prepared the following scope of work to sample and abandon the well. Task 1 - Remove and Dispose of Turbine Oil Based on the video survey and the measured size of the casing, Kleinfelder estimates that approximately 20 gallons of turbine oil will need to be removed from the top of the water The oil will be removed from the well by bailing Upon removal, the oil will be contained in a 55-gallon drum and recycled by the drilling company FWP-92-20 Page 1 of 4 Copyright 1992 Kletnfelder, Inc