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" PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> JOGI KHANNA M.D., M.P.H. <br /> Health Officer p " <br /> P.O. Box 2009 • ( 1601 East Hazelton Avenue) Stockton, California 95201 <br /> ( 209) 468-3400 <br /> ATTN DAN CROWNOVER <br /> APACHE PLASTICS C <br /> ��� D2050 E FREMONT ST \ \ 11SEP 0 2 1992 <br /> STOCKTON CA 95205 �J <br /> RE: Vapor Extraction System Operation SrM CODE: 2313 <br /> 2050 E. Fremont St. <br /> Stockton, CA <br /> It has come to our attention that due to site specific conditions at the above referenced facility, the <br /> current vapor extraction system (VES) will undergo modification to accommodate the volume of <br /> recovered hydrocarbons. In order to make modifications from the existing carbon adsorption method to <br /> a catalytic oxidizer, Anthony Mendes, Regional Manager of Permit Services of the San Joaquin Valley <br /> Unified Air Pollution Control District (SJVUAPCD) has informed my staff that there will be a six month <br /> delay in their review process. <br /> While this delay to the VES modification will prolong the soil remediation process, we believe you can <br /> concentrate on performing the groundwater monitoring that has lapsed. <br /> In our July 19, 1991 letter (enclosed), our concerns were that the dropping water table made it difficult <br /> to monitor some contaminants recognized by their physical properties as being heavier than water. <br /> The subsequent quarterly reports, prepared and submitted by Remediation Services, Inc., have <br /> documented that all existing monitoring wells are dry. It will be necessary for you to construct at a <br /> minimum monitoring well or wells to replace Monitoring Well # 1 which was destroyed under permit <br /> due to the Fremont Street widening. <br /> Construction and placement of additional monitoring wells may be referenced to Section 5.0 of the <br /> "Draft Remedial Work Plan" dated September 24, 1991 . A completed permit application, a scaled plot <br /> map illustrating the placement of the new wells relative to the existing wells, and the appropriate permit <br /> fee should be submitted to PHS/EHD so that the groundwater data may be included in the "Fourth <br /> Quarter Report" (October-December 1992) . In addition, an updated project schedule should be included <br /> within the same reporting quarter. <br /> If you have any questions, contact Diane Hinson, Supervising REHS, of my staff at (209) 468-3452. <br /> JogiKhann , . M.P. <br /> Health ce <br /> v <br /> urie A. Cotulla, RENS, Program Manager <br /> Environmental Health Division <br /> LAC/DH:lb <br /> c : Ann Cohn, Remediation Services <br /> c: Elizabeth Thayer, CVRWQCB <br /> A Division of San Joaquin County Health Care Semces <br />