Laserfiche WebLink
ECM group <br /> March 1 , 2003 <br /> � <br /> Michael Infurna, Senior REHS Ir,�<<-E �l '— D <br /> Site Mitigation Unit IV/LOP <br /> San Joaquin County Environmental Health Department MAR 0 5 2003 <br /> 304 E. Weber Street <br /> Stockton, California 95202 ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> Re: Work Plan for Subsurface Exploration <br /> PG & E Trench Project <br /> Byron Road, Tracy, California <br /> Dear Mr. Infurna: <br /> ECM Group (ECM) has prepared this letter on behalf of Pacific Gas and Electric <br /> Company (PG&E) to describe work planned to collect soil and groundwater samples <br /> at the subject site. The samples will be used to evaluate subsurface conditions <br /> along a planned trenching alignment. Analytic results from the sampling work will <br /> be used to provide recommendations for worker health and safety measures that <br /> may be implemented during the planned trenching activities. The project trenching <br /> alignment is adjacent to a new residential development in the City of Tracy. This <br /> work plan is submitted to EHD for approval prior to the site investigation activities. <br /> The trench excavation will be performed to install a natural gas pipeline along the <br /> south side of Byron Road, west of Corral Hollow Road in Tracy, California. Soil and <br /> groundwater contamination from existing pipelines (operated by others) has been <br /> identified in subsurface studies in the general vicinity of the planned excavation. <br /> This investigation is planned only for assessment of subsurface conditions with <br /> respect to worker safety during the trenching project. No additional assessment <br /> activities to investigate or identify contaminant source(s) are planned. <br /> Scope of Work <br /> 1 . ECM will complete twenty (20) soil borings along the approximate centerline <br /> of the planned trench excavation. The borings will be appproximately 8 to <br /> 12 ft deep, and will be spaced about 100 ft apart. The borings will be <br /> completed using a truck-mounted drilling rig, with either solid or hollow flight <br /> augers. The attached permit forms include the drilling contractor's C-57 <br /> registration. <br /> Page 1 of 3 <br /> 290 West Channel Drive, Benicia, Ca. 94510 707-751 -0655 707-751-0653 (fax) <br />