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PUBLIC HEALTH SERViCES <br /> PpUII./ <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer---.,, <br /> 304 E. Weber Ave., Third Floor • P. O. Box 388 • Stockton, CA 201`0,388 <br /> 209/468-3420 v! LA <br /> ULTRAMAR INC MAILED FEB 2 9199E <br /> RANDALL K STEPHENSON <br /> 525 THIRD STREET <br /> HANFORD CA 93232-0466 <br /> RE: Beacon #474 Site Code: 1173 <br /> 3440 E. Main Street <br /> Stockton, CA. 95205 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) has received a request <br /> from Gary Barker of Horizon Environmental for a written approval of a work plan and verification of the <br /> requirement to sample for MTBE. The approval for the work plan dated January 25, 1995 as submitted by <br /> Acton-Mickelson-van Dam, Inc is being withheld pending receipt of missing items. The requirement for MTBE <br /> analysis on soil samples in newly constructed monitoring wells and on all groundwater samples collected from all <br /> monitoring wells during quarterly monitoring is valid. <br /> In preparation for compliance to recent recommendations from both State and Regional Water Boards, PHS-EHD <br /> will require both soil and groundwater analyses of MTBE for newly installed monitoring wells. Soil analysis <br /> should utilize EPA Method 8240 modified GCMS with detection limits of 0.005 ppm and groundwater analysis <br /> should utilize detection limits of no greater than 1.0 ppb for the same EPA Method. Existing and newly <br /> installed monitoring wells should be sampled during subsequent quarterly events for MTBE also. <br /> A cursory review of the City of Stockton Encroachment Permit #63483 indicated that only one monitoring well <br /> is permitted under this encroachment permit. PHS-EHD approved the work plan for two monitoring wells (MW- <br /> 4 and 5) to be placed in the sidewalk and is concerned that other changes to the work plan may also exist. <br /> PHS-EHD can only approve the work plan as submitted. An updated City Encroachment permit is needed to <br /> reflect both of the originally proposed off-site monitoring wells or an addendum to the January 1995 plan is now <br /> required. <br /> Still outstanding are the City of Stockton Revocable Permit and another PHS-EHD boring permit application and <br /> $89 fee for the (two) off-site monitoring well(s). Once all of the required items are received and approved, <br /> PHS-EHD will issue the boring permits. <br /> You may direct your submittals and any questions you may have to Michael Inf irna at (209) 468-3454. <br /> Donna Heran, REHS, Director <br /> Enviro ental Health Division <br /> Michael Infurna, Senior REH Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor. <br /> MI <br /> c: Gary Barker - Horizon Environmental <br /> A Division of San Joaquin Count•Health Care Services <br />