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%ii :'7f <br /> 1767 Hammer Lane <br /> Page 2 <br /> or push-point technology. Should the soil contamination extend to groundwater, two cost <br /> effective options exist depending on the drilling methodology which was selected: either t <br /> install groundwater monitoring wells or collect groundwater grab samples. <br /> I <br /> If soil contamination has not been defined within the estimated scope of work, as time <br /> allows within the budget, additional soil borings should be drilled within the same phase of ; <br /> work. If soil contamination can be defined and appears to be limited, PHS/EHD suggests in <br /> addition to chemical analysis, the analysis of additional parameters which may include: <br /> organic carbon content, soil .aeration, soil moisture content, soil pH, microbial population, <br /> and soil nutrient concentration (C:N:P ratio) <br /> Once the extent of soil contamination has been determined remedial alternatives should be <br /> evaluated. Should groundwater contamination be evidenced, it will be necessary to <br /> perform a groundwater investigation. <br /> If I can answer any further questions or provide regulatory input, please do not hesitate to <br /> contact me at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> i <br /> Mary Meays, Senior REH Margar6 Lagorio, REHS <br /> Site Mitigation Unit Lead Senior <br /> �a <br /> MM/1767HAM <br /> cc: Elizabeth Thayer, Central Valley Regional Water Quality Control Board <br /> 4 <br /> I <br /> I <br /> k <br /> �3 <br />