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Wm. J. Hunter & Associates 2220 Loma Vista Dr <br /> Registered Geologists Sacramento, CA 95825 <br /> �etroleum 8 Mineral Appraisers (916) 972-7941 <br /> FAX (916) 972-1683 <br /> ADDENDUM TO PAR & WORKPLAN FOR <br /> SOIL/GROUNDWATER INVESTIGATION <br /> 1211 SOUTH TURNPIKE ROAD, STOCKTON, CA <br /> SITE CODE 1788 <br /> Prepared for <br /> San Joaquin County Public Health Service <br /> Environmental Health Divison <br /> by <br /> Wm. J Hunter & Associates <br /> February, 1995 <br /> Addendum dated April 3 , 1995 <br /> PURPOSE OF ADDENDUM- <br /> The workplan submitted by Wm J. Hunter & Associates , dated <br /> February 15 , 1995, proposed placing one ( 1 ) soil boring in the <br /> center of the site of the removed UST, and converting it to a <br /> groundwater monitoring well Correspondence from the San Joaquin <br /> County PHS, Environmental Health division, dated March 8 , 1995 , <br /> stated that the workplan did not allow sufficient assessment of <br /> the problem, and required that an amended plan be submitted <br /> . The following revised workplan is being submitted for approval to <br /> comply with that requirement <br /> REVISED WORKPLAN -FOR SOIL/GROUNDWATER INVESTIGATION <br /> Because of serious space constraints , excavation of additional <br /> soil is not considered feasible, & mobilization of an auger rig <br /> will be extremely difficult Utilizing the Leaching Potential <br /> Analysis worksheet for gasoline, (Table 2-1 from the LUFT <br /> Manual , ) the levels of contamination measured in the soil sample <br /> taken from beneath the tank site exceed those allowable to left <br /> in place. Therefore, we are proposing to place three ( 3 ) soil <br /> borings as shown on the attached revised PLATE V Each soil <br /> boring will be advanced to groundwater, estimated to be at about <br /> 50 ' bgl at this location, they will then be deepened to at least <br /> 10 ' below the water table in order to complete as a monitoring <br /> well The actual locations may vary somewhat from the ones shown <br /> on the site map, final locations will be determined by a licensed <br /> surveyor after placement <br /> All field activities will be under the direction of a geologist <br /> from Wm J Hunter & Associates A general health & safety plan <br /> has been furnished with the original workplan <br /> . REVISED WORKPLAN <br /> 1 Mobilize MDE Corp auger rig equipped with sufficient clean <br /> 1 <br />