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S-. E OF CALIFORNIA GEORGE DEUKMEJIAN,Govemor <br /> C `1FORNIA REGIONAL WATT QUALITY CONTROL BOARD— <br /> CEN RAL VALLEY REGION <br /> '3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> 13 August 19..q 7 AUG 1 �'' i4R7 <br /> ENVIROMENTAL HEALTH <br /> Mr. Richard Keffer FERMIT/SERVICES <br /> Pet Foods, Inc. <br /> 400 S. Fourth Street <br /> St. Louis, MO 63102 <br /> OGDEN FOODS UNDERGROUND TANK, STOCKTON, SAN JOAQUIN COUNTY <br /> The San Joaquin Local Health District has referred this site to our office due <br /> to its potential to adversely impact ground water quality. We have reviewed the <br /> report entitled "Ogden Food Products Corporation Soil and Ground Water <br /> Investigation, Stockton, California". <br /> In summary, a large amount of fuel oil has leaked from a concrete tank, and now <br /> exists below the water table. Results of water analyses for total petroleum <br /> hydrocarbons has shown varying levels of dissolved constituents in two <br /> monitoring wells. <br /> Based on our review of the report we feel that ground water quality is very <br /> likely to be degraded. To address the concerns of the Regional Board the <br /> following steps should be taken at this time: <br /> 1. A sample of the fuel oil , or soil soaked with fuel oil (as that found to <br /> contain 21,000 ppm fuel oil ) should be analyzed using EPA Methods 8240 and <br /> 8270 to identify constituents of concern. The most desirable sample would <br /> be a composite of samples taken from several highly contaminated areas <br /> under .or around the tank. <br /> 2. Water levels of the three monitoring wells should be measured and recorded <br /> on a monthly basis, so that water table gradient changes can be identified. <br /> This should begin immediately. <br /> With the information gained from the above analysis you should be able to <br /> identify the tasks necessary to characterize the full extent of water quality <br /> contamination or threat to water quality from fuel oil at this site. <br /> We will likely ask for additional characterization of site water quality based <br /> on the results of the 8240 and 8270 analyses of the fuel oil . If water analyses <br /> of those constituents in ground water comes up clean, a monitoring program may <br /> be necessary to prove there will not be a water quality problem in the future, <br /> If we can be assured that the site poses no water quality threat, it will be <br /> referred back to the San Joaquin Local Health District and the State Department <br /> of Health Services for further action. The soil and fuel oil at this site may <br /> be characterized as a 'hazardous waste' since concentrations of total petroleum <br /> hydrocarbons are exceeding 1,000 ppm, <br />