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• • <br /> 1.0 PURPOSE AND SETTING <br /> The purpose of this work plan is to provide details regarding the monitoring <br /> well installation and sampling techniques which will be used to install three <br /> monitoring wells on the California Concentrates Facility. The facility is located <br /> in Acampo, California at 18678 North Highway 99 in San Joaquin County. <br /> Jacobson Helgoth Consultants,Inc., (JHC) has been retained by DJH Engineering <br /> and California Concentrates to plan and complete the proposed work effort. <br /> This work plan is being completed in response to the February 14, 2001 letter <br /> from the Central Valley Regional Water Quality Control Board (RWQCB) which <br /> required a revised monitoring and reporting program. <br /> For this work plan, the monitoring well work plan guidance document attached <br /> to the referenced letter was used. This document herein provides preliminary <br /> information and rationale for monitoring well placement. Boring logs for the <br /> two existing wells on site were available and are provided in Attachment A. <br /> Information in the area indicates that the near surface geology is comprised of fill <br /> and reworked alluvial deposits. Sand bed thickness does vary. Ground water <br /> may be semiconfjned beneath plastic clays. The ground water flow direction is <br /> assumed to be to the North with a southerly ground water flow direction due to <br /> seasonal variations. Water levels from the two existing wells were used,but <br /> mounding can be observed from the ponds and river located to the south. Refer <br /> to Section 2.0 for more details. The well depths of the existing wells are <br /> approximately 35 feet below ground surface(bgs) and ground water has been <br /> encounterd at depths greater than 15 feet bgs. A ground water elevation table is <br /> provided in Section 2.0. <br /> Catifomia Concentrates Monitoring Well Work Plan Issued: June 8,2001 <br /> JHC Project No.493-01 1 Revision 1 <br />