FIELD DOCUMENTS_1982-1985 - Laserfiche WebLink

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March 5, 1984 Minimum Conditions for Corrective Actions at the Marley Cooling Tower, Company, Stockton, San oaquin unty, California 1 . Within thirty (30) calendar days from the date of settlement, Marley shall submit to the Department for approval a sampling plan to determine the areal and vertical extent of soil and groundwater contamination in the north section of the facility (north of the railroad tracks) . The samplingrription an shall include, but shall not be limited to, the following: a. A desof chemicals to be analyzed and the rationale for each proposed sample. The analysis should be done for total heavy metals. For heavy metals other than chromium if the total level for the metal is between the soluble threshold limit concentration (STLC) and the total threshold limit concentration (TTLC) , the waste extrac- tion test (WET) must be done. For chromium, if the total level is between 5 ppm and 2,500 ppm, the WET must be done. If the soluble level for chromium based on the 'WET is greater than 5 ppm, then the sample must be analyzed for hexavalent chromium (Cr VI) . The procedures to be used for these analyses are those listed in the California Assessment Manual (CAM) , October 1982, and the limits (TTLC and STLC) to be used are those listed in the Criteria and Guidlines for Identification of Hazardous and Extremely Hazardous Wastes, September 1983. If the draft criteria regulations have been adopted, the procedures therein shall be followed, except that the chromium limits above shall be used for determining the need for analysis of extractable and hexavalent chromium. b. A systematic waste material, soil and groundwater sampling/analysis program to define dimensions and depth of hazardous waste deposits and soil and groundwater contamination. The sampling shall be in a tight grid pattern in the areas of the retort pit, the drip pad, the storage tanks, and the waste water percolation pond. The rest of the site shall be sampled in a more open grid pattern. In the tightly grided areas soil sampling shall be done immediately beneath the as- phalt, and at five foot increments down to eighty feet. In the open grided areas soil sampling shall be done immediately beneath the as- phalt, at 2 feet, at 5 feet, and 5 foot increments down to forty feet. In two locations near the highest areas of contamiantion sections of asphalt shall be removed. Each section of asphalt shall be cut in half and the one half cut in half again as illustrated below. PW trt t.t L Each subsection of asphalt shall be analyzed for heavy metals, specifically arsenic, copper and chromium.