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B R O W N A N D <br /> C A L D W E L L <br /> June 24, 1999 <br /> Mr Ronald Rowe <br /> San�oaquin County Public Health Services <br /> Environmental Health Division <br /> 304 Webster Avenue <br /> Post Office Box 388 <br /> Stockton, California 95201-0388 017-16271-001/1 <br /> Subject Work Plan for Quarterly Sampling of Monitoring Wells, <br /> T&T Trucking, 11396 North Highway 99, Lodi, California <br /> Dear Mr Rowe <br /> On behalf of T&T Trucking, Brown and Caldwell (BC) is submitting this work plan for <br /> the quarterly sampling of four groundwater monitoring wells at the subject site (Figure 1) <br /> The objective of this work plan is to collect data and establish a history of analytical <br /> groundwater data for the site The purpose of the quarterly groundwater sampling is to <br /> determine the magnitude of petroleum hydrocarbon concentrations in groundwater and <br /> the direction and gradient of groundwater flow beneath the subject site Upon review and <br /> written approval from the San Joaquin County Public Health Services Environmental <br /> . Health Division (County), this work plan will be submitted to the UST Cleanup Fund <br /> (Fund) for pre-approval Upon pre-approval from the Fund, work will continue <br /> The following describes the scope of work and time completion for a summary letter of the <br /> results of this work on a quarterly basis <br /> Scope of Work <br /> BC will conduct quarterly sampling of four monitoring wells Each sampling event will <br /> include <br /> • The measurement of the depth to water of each well, purging each well of three casing <br /> volumes, <br /> • Field measurement of water quality parameters (pH, EC, temperature, and dissolved <br /> oxygen), <br /> • Collection of appropriate groundwater samples, <br /> This report was prepared in accordance with the standards of the environmental consulting industry at the time it was <br /> prepared It should not be relied upon by parties other than those for whom it was prepared and then only to the extent of <br /> the scope of work which was authorized 7hts report does not guarantee that no additional envtronmental contamination <br /> • beyond that described in this report exists at the site <br /> BCSACOIT 116000116271\WRIfPLN2 doc <br /> Environmental Engineering And Consulting Analytical Services <br /> 9616 MICRON A\ENUE SuiTE 600, SACRAMENTO CA 95827 2627 <br /> (916) 444 0123 FAX (916) 856 5277 <br />