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I <br /> PUBLIC HEALTH SEI nCES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer . <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> JAY JAHANGARI <br /> PORT OF STOCKTON <br /> P O BOX 2089 <br /> STOCKTON CA 95201 <br /> RE: Port of Stockton <br /> Site 3,Port Roads 13/14&G <br /> Stockton,CA <br /> WORKPLAN: Work Plan for Assessing_Lateral and Vertical Extent of Petroleum Hydrocarbons in Soil and <br /> Groundwater DATED: 9/11/01 <br /> PREPARED BY: Geomatrix <br /> APPROVED X <br /> DISAPPROVED ❑ <br /> ADDENDUM ❑ Submit by: <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN(H&S 25299.37,subd.(c)(3)): <br /> 1. Installation of four soil borings,one monitoring well and collection of soil samples and water samples. <br /> 2. Laboratory analysis of soil and water samples for total petroleum hydrocarbons and BTEX. f <br /> COMMENTS AND CONDITIONS: f <br /> 1. Soil samples must be collected for lithological description from 10 feet below surface grade(bsg)to the <br /> total depth of the borings. <br /> 2. Discrete water samples must be collected from 20 feet;bsg and at the bottom of the boring. The total <br /> depth of the boring should be at least to 40 feet bsg. If sand is not encountered at 40 feet bsg drilling <br /> should continue until sand is encountered so the water'sample is collected in a sand interval. <br /> 3. If the boring location to the east of the former UST area cannot be moved closer to the release area it may <br /> not be necessary. <br /> 4. Central Valley Regional Water Quality Control Board is requiring analysis for 1,2-DCA and this analysis <br /> has not be performed at this site. Water samples should be analyzed for 1,2-DCA using EPA Method <br /> 8260. <br /> 5. Obtain a wellpermit from EHD and notify EHD at least 48 hours prior to the proposed scheduled work <br /> dates. <br /> DATED C) BY <br /> Cc: CVRWQCB—Marty Hartzell <br /> Geomatrix—Philip Ross <br /> �C <br /> l <br /> A Division of San Joaquin County Health Care Services <br /> i <br />