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r. <br /> %WWI, ; <br /> V <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY =% <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer •. p <br /> 445 N. San Joaquin Street • P.O. Box 388 • Stockton, CA 95201-0388 <br /> (209) 468-3420 <br /> MARIAN FRY <br /> C/O JERYL FRY <br /> 12609 WEST LANE <br /> LODI CA 95240 ��L <br /> RE: Mohr-Fry Ranches SITE CODE: 1152 <br /> 950 Industrial Drive <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) has <br /> reviewed the Phase III Remedial Excavation dated October 25, 1994 which was received by this <br /> office on October 26, 1994 submitted by WHF Environmental and Engineering Group for the <br /> above referenced site. <br /> The workplan describes excavations at three locations on the site. The area containing the former <br /> 3 nested 550 gallon Fuel Oil tanks where B-1 is currently located, the area containing the former <br /> 10,000 gallon Diesel fuel tank where B-2 is currently located and the former surface tank site <br /> where MW-3 is currently located. <br /> The workplan indicates that field screening will be conducted with a PID to minimize the <br /> dimensions of the excavations. Excavation in the area of B-1 may extend beneath the building. <br /> Approximately 1650 cubic yards of soil is anticipated to be removed. This soil will be stockpiled <br /> on site for bioremediation and then returned to the excavations upon determination that <br /> contamination in the stockpile is below detection limits. PHS/EHD requires that one sample for <br /> every 25 cubic yards of stockpile be submitted for laboratory analysis, to determine if <br /> bioremediation has been effective, prior to returning the stockpile to the excavations at the site. <br /> The workplan states that quarterly groundwater monitoring will be conducted for a period of one <br /> year to insure that no remaining concentrations of petroleum compounds in the soil reach <br /> groundwater. <br /> PHS/EHD recommends quarterly sampling to continue until the site is in the closure phase of <br /> the investigation. PHS/EHD is aware that results of groundwater sampling from 3/31/93, <br /> 3/11/94, and 8/4/94 are non detect for BTEX and TPH-d. This site does pose a threat to <br /> groundwater based upon the presence of Xylene at a depth of 50 feet which was discovered <br /> during the installation of MW-1, MW-2 and MW-3. Depth to water in 1983 in this area was <br /> approximately 30 feet. Therefore this contamination is below high water. Current depth to water <br /> is approximately 50 feet. <br /> The workplan states that water samples will be analyzed by a State of California licensed <br /> A Di%iaiun of San Joaquin Counh Health Care Senice. <br />