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ENVIRONMENTAL HEALTH DEPARTMENTSAN JOAQUIN COUNTY <br /> • ]o -aC� COG Unit Supervisors <br /> a z� Donna K Heran,R.E H.SCart Borgman,R E H S <br /> Director 304 East Weber Avenue, Third Floor Mike Huggins,R E H S ,R D I <br /> • Al Olsen,R.E H S Stockton, California 95202-2708 Douglas W Wilson,R E H S <br /> • eq �P Program Manager Telephone (209) 468-3420 Margaret Lagorio,R E H S <br /> F o as Laurie A Cotulla,R E_H S Robert McCieilon,R E H S <br /> Program Manager Fax (209) 464-0138 Mark 13arcellos,R E H S <br /> NICHOLAS BOKIDES DEC 3 0 Z90Z <br /> MEL BOKIDES PETROLEUM INC <br /> P O BOX 7747 <br /> STOCKTON CA 95267 <br /> RE Niel Bokides Petroleum SITE CODE 1200 <br />' 2191 Navy Drive <br /> Stockton, CA <br />' San Joaquin County Environmental Health Department (EHD) has reviewed the <br /> "Site Assessment Work Plan —Addendum" dated September 26, 2002 and <br /> "Quarterly Report--- Fourth Quarter 2002" dated December 2, 2002 prepared by <br /> Advanced GeoEnvironmental, Inc (AGE) for the above referenced site <br /> • In a fetter dated June 6, 2002, EHD agreed with the AGE recommendation for a <br /> deep soil boring in the former UST area with collection of water samples to define <br /> the vertical extent of the hydrocarbon impact to ground water This <br /> recommendation was proposed again in the Fourth Quarter 2002 report EHD <br /> i agreed with the recommendation of a boring because it would allow for collection <br /> of ground water samples from mcre than one permeable zone if determined <br />' necessary <br /> The Site Assessment Work Plan, however, proposes to install a depth-discrete <br />' ground water monitoring well (screen interval from 45 to 50 feet below surface <br /> grade) The boring logs from previous investigations at the site show fine- <br /> grained material to a depth of 26 feet and sand from 26 to 30 feet below surface <br />' grade (bsg) None of the investigations at this site have been beyond 30 feet <br /> bsg, so the lithology beneath this depth is unknown at this site The monitoring <br /> well screen interval must be placed in a zone of permeable material The work <br /> plan must reflect this, not propose placement of the well screen at an arbitrary <br /> depth of unknown lithology <br /> 1 The September 2002 Site Assessment Work Plan is not approved Please <br /> submit a work plan for a deep soil boring as proposed in quarterly reports or <br /> construction of a monitoring well that will be based on site lithology beneath 30 <br />' feet and will be screened in the next permeable zone by February 5, 2003 <br /> 1 <br />