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/97� GEOMATRW If clean closure is not achieved, the pumps will be scrapped. In order to demonstrate the pumps ' do not exhibit the characteristics of a hazardous waste, additional analysis for pH and acute toxicity will be conducted.The results will be compared to 22 CCR 66261.22 and 66261.24 to demonstrate that the metal does not exhibit the characteristics of a hazardous waste prior to disposal as scrap metal. 6.5 Closure of Soil Below Aboveground Pipeline Flanges and 'Valves The aboveground pipelines have a total of five flanges and valves that overlie exposed soil or areas covered with asphalt or concrete pavements. This closure plan will include sampling beneath the pavement of soil below each flange or valve. The approximate location of the flanges and valves and the proposed soil sample locations are indicated an Figure 2. The actual location of the soil samples will be determined during closure by the registered engineer. For areas of soil sampling, surficial asphalt or concrete pavement will be broken out with a chisel or removed with a concrete saw. Soil samples will be collected using a drive sampler fitted with pre-cleaned brass sample tubes. The samples will be collected approximately 6 to 8 inches below the paved surface. If fill soils are encountered at this depth, the sampling depth will be increased so that samples of the upper 6 to S inches o£native materials are obtained. The drive sampler will be cleaned between sample locations. The tubes will be seated with plastic end caps and tape. The samples will be sealed, labeled, and placed in an iced cooler for transport to the laboratory under chain-of-custody procedures. The soil samples will be analyzed for DBCP and EDB using - EPA Method 8011, organochlorine pesticides using EPA Method 8080, and organophosphorus pesticides using EPA Method 8140. If the soil samples contain hazardous waste concentrations of pesticide residues,depending on the ' quantities involved, Simplot may arrange to remove, treat (if necessary), and dispose of the soil at a permitted hazardous waste landfill. Groundwater below the site is being collected and treated to remove pesticide residues, as described above in Section 2.5. The soil surface over most of the Ag Chem area is paved. These conditions provide effective controls for exposure routes and cleanup beyond hazardous waste concentrations does not appear warranted. 6.6 Closure of Secondary Containment Area and Sumps The secondary containment area around Tanks 127 and 128 is a bermed and asphalt-covered area with dimensions of approximately 120 feet by 180 feet. The containment area contains a concrete collection sump. Two additional sumps are located outside of the containment area. One of the sumps is used as a stormwater drainage sump and is located immediately north of the northern wall of the containment area. The other sump is located adjacent to the rail car loading area in 10