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or <br /> K <br /> =" & ASSOCIATES , INC <br /> GEOTECHNICAL ENGINEERING - ENVIRONMENTAL ENGINEERING <br /> CONSTRUCTION TESTING & INSPECTION <br /> B First in <br /> By rst Class Mat and <br /> Telecopy (209)464-0138 <br /> ' July 23, 1998 Project No 014-978081 <br /> Mr Michael J Infurna, Senior REHS <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> RE Workplan Addendum <br /> June 9, 1998 Site Assessment Workplan <br /> H&H Engineering Property <br /> 212 Industrial Drive <br />' Stockton, California <br /> Dear Mr Infurna <br /> On behalf of Ms Jan Thompson of Wilbur Ellis Company, and with the acknowledgment of Mr Doug <br /> Reynolds of H&H Engineering, Kxazan & Associates, Inc (Krazan) has prepared this addendum to <br /> address comments in the June 23, 1998 San Joaquin County Environmental Health Division (SJCEHD) <br /> letter The responses to the issues noted within the June 23, 1998 letter are summarized below <br /> Item No. 1. Soil samples will be collected from 60 feet below ground surface (bgs) If soil <br /> contamination is found at 60 feet bgs, vertical investigation must continue until two <br /> consecutively collected and analyzed five foot soil samples verify that detectable <br /> concentrations of petroleum hydrocarbons are no longer present <br /> Item No. 2 The placement of the required monitoring wells will be based on field and laboratory data <br /> collected from soil and groundwater sampling in "Phase One" The wells will be placed as <br /> close to the "zero-line" of the groundwater contamination as possible so an accurate <br /> assessment of the extent of the plume can be made The location of the proposed <br /> monitoring wells shown in the June 9, 1998 workplan are diagrammatic, the final location <br /> will be based on the above-noted criteria <br /> 215 West Dakota Avenue- Clovis California 93612 - (209)348-2200- FAX(209)348-2201 <br />' Offices Serving the Western United States <br /> 98081 AAD <br />