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low <br /> �� KLEINFELDER <br /> 40 GROUND WATER ASSESSMENT WORK PLAN <br /> CAL WEST CONCRETE CUTTING, INC. <br /> MANTECA, CALIFORNIA <br /> 24-220211-A00 <br /> October 29, 1992 <br /> INTRODUCTION <br /> Cal West Concrete Cutting, Inc , is located at 1153 Vanderbilt Circle in Manteca Two <br /> underground storage tanks (10,000-gallon diesel and 5,000-gallon gasoline) were excavated <br /> and removed from the site. At the request of San Joaquin County Public Health Services <br /> (SJCPHS), additional soil was removed from the excavation Based on the analytical results, <br /> Ms Turkette of the SJCPHS indicated that the County would not request additional soil <br /> removal based on the data However, due to the past shallow depth to water, the County <br /> requested one to three ground water monitoring wells The number of wells installed would be <br /> dependent on the ability to estimate a ground water gradient for the site from a nearby facility <br /> with existing ground water monitoring wells The County has requested the following items <br /> from Cal West Concrete Cutting <br /> ► A Work Plan and Boring Permit, <br /> Ground Water Gradient Review; <br /> • lo, A Minimum of One Ground Water Monitoring Well, <br /> A Report of Findings <br /> SCOPE OF SERVICES <br /> Task 1 - Ground Water Gradient Review <br /> Ms Turkette had indicated to Kleinfelder that there was a facility at 575 Industrial Road in <br /> Manteca with existing ground water monitoring wells If the ground water gradient at this <br /> facility appeared to be consistent for at least two quarters, the SJCPHS would consider the <br /> initial installation of a single monitoring well downgradient of the excavation Cal West <br /> Concrete Cutting should be aware that if a consistent gradient is not observed or petroleum <br /> hydrocarbons are encountered in the single monitoring well, additional monitoring wells will <br /> be requested by the County. <br /> Kleinfelder contacted Mr Joseph Henao of the Central Valley Regional Water Quality Control <br /> Board (RWQCB) in an effort to review available RWQCB files on the Ditz Brothers facility <br /> located at 575 Industrial Road. Mr Henao has the Manteca area as his area of oversight <br /> responsibility. According to Mr. Henao, there are no files at the RWQCB for the Ditz <br /> Brothers facility. Kleinfelder is submitting a file review request to San Joaquin County. <br /> According to the County, it will take approximately three weeks to process the file review <br /> application. <br />• <br /> FWP2-92-23 Page 1 of 3 <br /> Copyright 1992 Klemfelder, Inc <br />