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10540 White Roel.Ro-td Suite 180 <br /> Rancho Cordo%a C-difomta 95670 <br /> rd (916)444-0123 <br /> Fax ()l 0)635 8805 <br /> www brow nandcaldw ell coin <br /> July 25,2006 <br /> S R 1 W N AND i <br /> Mr Terry Tarditi <br /> - T&T Trucking,Incorporated <br /> 11396 North Highway 99 <br /> Lodi,California 95240 017/130025-001/1 <br /> Subject Second Quarter 2006 Groundwater Monitoring Report <br /> 11396 North Highway 99, Lodi, California <br /> Dear Mr Tardtti <br /> This letter report transmits results of the second quarter 2006 groundwater <br /> monitoring events for the referenced site As requested by the San Joaquin County <br /> Public Health Services Environmental Health Division (PHS/EHD) this report is <br /> being submitted to the GEOTRACKER database Quarterly sampling and reporting <br /> is required by the PHS/EHD,as outlined in their April 12, 1999 letter to <br /> T&T Trucking,Inc <br /> WORK PERFORMED APRIL-JUNE 2006 <br /> Brown and Caldwell measured water levels and collected groundwater samples for the <br /> second quarter on May 23,2006 This sampling event was conducted in accordance <br /> with Brown and Caldwell's Workplan for Quarterly Sampling of Monitoring Wells <br /> This Workplan was approved by the PHS/EHD <br /> The soil vapor extraction (SVE) and air sparge(AS)pilot test was conducted on <br /> May 3 through May 16,2006 A separate report for the completion of the SVE and <br /> AS test has been submitted to the PHS/EHD <br /> STATUS OF INVESTIGATION AND CLEANUP ACTIVITIES <br /> Quarterly groundwater monitoring at the site has been ongoing since 1998 in the <br /> four groundwater monitoring wells at the site (Figure 1) The quarterly report and <br /> previous groundwater monitoring results and subsurface investigations indicate <br /> hydrocarbon-impacted groundwater extends horizontally from the former source <br /> area (4,000-gallon underground storage tank [UST]) to beyond the most southerly <br /> p\30000\13oo25- I &I Irucking GW Morutunng2006\Reports\2nd 06ytrdoc <br />