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Task 4 <br /> The gradient will be calculated for the site based on ground to <br /> water data collected. <br /> Task 5 <br /> The four groundwater samples will be analyzed for Total Petroleum <br /> Hydrocarbons, as gasoline (TPHG) ; Benzene, Toluene, Ethylbenzene <br /> and Xylene (BTEX) via EPA Modified Method 8020/8015 and for the <br /> Oxygenates using the EPA Method 8260. <br /> Task 6 <br /> ----- _ A report,signed by the Certified Engineering Geologist, will <br /> include a summary o ,-e-AG-,documen*at on, certified <br /> analytical results, conclusions and recommendations, in <br /> accordance with the "Tri-Regional Board Staff Recommendations for <br /> Preliminary Evaluation and Investigation of Underground Storage <br /> Tank Sites". The report will be submitted to the PIEDMONT <br /> LUMBER and the SJCEHD as required. <br /> A copy of this proposed workplan is being mailed to Carol Oz, <br /> REHS, SJCEHD and 48 hours prior to any field work SJCEHD will be <br /> notified of the anticipated work. <br /> I trust that you will find this proposed workplan satisfactory to <br /> your needs. If you have any questions, please contact me at <br /> (510) 505-0722. <br /> Sincerely, <br /> P. Cummings - - - <br /> P incipal <br /> cc Carol Oz, SJCEHD <br /> Christopher W. Wood, Esq. <br /> 2 <br />