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PUBLIC HEALTH SERVICES ou,IV <br /> SAN JOAQUIN COUNTY ` <br /> EN-VIRONMENTAL HEALTH DrVISION �. <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 E. Weber Ave., Third Floor • F. O. Box 388 • Stockton, CAi�5MI 03$8 —)' \\,, «aa�`P <br /> 2491468-3420 �, <br /> U- U <br /> MLED JUN 2 0 1996 <br /> GERALD THIEMANN <br /> 327 BLOSSOM DRIVE <br /> RIPON CA 95366 <br /> Re Thiemann's Service Site Code: 1479 <br /> 106 Second Street <br /> Ripon CA 95366 n <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/ErID) has <br /> completed review of the "Addendum to Workplan for Subsurface Investigation" dated May 15, <br /> 1996 PHS/EHD has the following comments for your consideration. <br /> The work pian included a proposal to install two air sparge wells and three vapor wells to determine <br /> if vapor extraction and air sparging are viable remedial options and to ascertain design specifications <br /> should either or both remedial alternatives be deemed erfective following cost and technological <br /> feasibility analysis Tne work plan also stated that at minimum two soil samples would be collected <br /> rrom each boring for laboratory analysis PHS/EHD recommends that additional soil samples be <br /> submitted for laboratory analysis if necessary to better define the extent of soil contamination to be <br /> remediated or to obtain site specific information to evaluate the potential migration and <br /> environmental fate of any residual soil contamination following active remedial efforts <br /> PHS/EHD concurs that a reduction in the sampling frequency of monitoring wells, MW1, MW2, <br /> MW4, and MWS, was approved until such time as the active remediation effort is undertaken, at <br /> which time the sampling frequency of wells throughout the site will be re-evaluated. <br /> Enclosed is a permit for the wells proposed in the addendum FHS/EHD hopes that once active <br /> remedial erforts are undertaken that site closure conditions can be achieved Please contact me at <br /> f209) 468-0337 at feast 2 working days prior to implementing field activities, so that site <br /> inspections may be scheduled. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> Mary Meays, Senior REHS Margaretr'Lagorio, REHS <br /> Site Mitigation Unit Lead Senior <br /> MMI106SEC <br /> cc Elizabeth Thayer, CVRWQCS <br /> George Lockwood, SWRCB Cleanup Unit <br /> cc Jeanne Homsey, Smith Environmental <br /> A Division of San Joaquin County Health Care cervices <br />