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Mr. Russell Chapin <br /> 1766 W. Monte Diablo Avenue <br /> Page 2 of 2 <br /> At this time the EHD does not concur with the recommendations for additional <br /> site assessment or collection of soil gas samples from beneath the structure on <br /> the site as a technical justification was not provided for either. If such data is <br /> needed to fulfill the directives currently in effect the specific need(s) should be <br /> noted. The dissolved benzene concentrations in groundwater can be monitored <br /> with resumption of the GWE system, if concentrations persist above the ESL for <br /> vapor intrusion the soil gas sampling recommendation will be revisited. <br /> Questions and/or comments may be directed to Nuel Henderson at <br /> (209) 468-3436. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> �iiG^%fit <br /> Nuel C. Henderson, Jr., PG Margar Lagorio, REHS <br /> Engineering Geologist Program Coordinator <br /> Unit IV, LOP Unit IV, LOP <br /> C: Mr. James L.L. Barton — CVRWQCB <br /> Mr. Dennis Parfitt - SWRCB <br /> Mr. William Little - AGE <br /> Supervisor Victor Mow— San Joaquin County Board of Supervisors <br />