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lF` <br /> STEVE & GENE SERVICES <br /> Page 2 <br /> (bsg). Analyses of soil samples taken at that depth and field observation <br /> indicated the presence of petroleum contamination. <br /> 2) Utilizing continuous core or cone-penetration test technology to better assess <br /> the subsurface lithology and physical characteristics of the soil such as <br /> permeability, dry bulk density, porosity, moisture content, and organic carbon <br /> content. Design and installation of additional monitoring wells should be <br /> driven by geological information. <br /> 3) Using short screen (5 feet) length instead of long screen length monitoring <br /> wells. <br /> Submit a work plan to define the vertical extent of the contamination to PHS/EHD <br /> November 30, 1998. <br /> If you have any questions, please feel free to contact Jeffrey Wong at (209) 468- <br /> 0335. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> C � --� <br /> Jeffrey Wong, EHS, Trainee Margar Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Supervisor <br /> JW:Ib <br /> c: RWQCB, Central Valley Region - Mark List <br /> c: Geological Technics, Inc. - Rayhold I. Kablanow <br />