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r <br /> J t. <br /> PUBL HEALTH SERICES <br /> SAN JOAQUIN COUNTY c` <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer <br /> P.O.Box 2009•(1601 East Hazelton Avenue) Stockton, California 95201 c9t1 FdaN�r <br /> (209)468.3400 <br /> MAR 7 199 <br /> JAMES GILLIES zoo <br /> GILLIES TRUCKING <br /> P 0 BOX 8303 <br /> STOCKTON CA 95208 <br /> RE: 3931 Newton Rd. IN REPLY REFER TO SITE CODE: 1703 <br /> Stockton <br /> We have completed our review of your preliminary report entitled "Report of Test Borings and Well <br /> Installation" dated December 3, 1990, as prepared by Richesin and Associates, Inc. <br /> It will be necessary for you to complete, as a minimum, two additional monitoring wells in order to <br /> adequately define the nature and extent of the groundwater contamination. We advise that these additional <br /> wells be drilled as quickly as possible in order to achieve the water quality data needed to ascertain the type <br /> of remediation best suited for the site. <br /> These additional data points will better define the reference made in the report to the "hardpan" layers <br /> which may or may not restrict the fuel's migration toward groundwater. <br /> Once the wells are installed, pumping test data is highly recommended to explore the possibility of the <br /> domestic well's influence and/or hydraulic conductivity with the other wells. <br /> This additional drilling, soil/groundwater sampling, the pump test data as well as subsequent remediation <br /> plan, for soil and/or groundwater shall be included in the next phase of the site's investigation, The <br /> Problem Assessment Report. The permit application to perform the additional work shall be submitted to <br /> Public Health Services,Environmental Health Division (PHS/EHD), 30 days from the date of this letter. The <br /> report will be due into PHS/EHD and Central Valley Regional Water Quality Control Board (CVRWQCB) no <br /> later than 90 days from the date of this letter. <br /> If you have any questions call Diane Hinson, Supervising REHS, of my staff at (209) 468-3452. <br /> Jogi Khanna, Iy1.D., M.P.H. <br /> Health Offie(r <br /> Laurie A. Cotulld, REHS, Program Manager <br /> Environmental Health Division <br /> LAC/DH:nr <br /> c: CVRWQCB <br /> c: Richesin and Associates <br /> 274 Barrett Circle, Danville, CA 94526 <br /> A Division of San Joaquin County Health Cate Services <br />