ABSTRACT
Abstract ..........................................................................................................................................366 11.1 Introduction .......................................................................................................................... 367
11.1.1 Background ............................................................................................................. 367 11.1.2 Metals and Metalloids ............................................................................................ 368 11.1.3 Purpose ................................................................................................................... 368
11.2 Industrial Processes and Contaminants at Metal Finishing Sites ........................................ 369 11.2.1 Surface Preparation Operations .............................................................................. 369 11.2.2 Metal Finishing Operations .................................................................................... 370
11.2.2.1 Anodizing Operations ........................................................................... 371 11.2.2.2 Chemical Conversion Coating .............................................................. 371 11.2.2.3 Electroplating ........................................................................................ 372 11.2.2.4 Electroless and Immersion Plating ........................................................ 372 11.2.2.5 Painting ................................................................................................. 372 11.2.2.6 Other Metal Finishing Techniques ........................................................ 372
11.2.3 Auxiliary Activity Areas and Potential Contaminants .......................................... 372 11.2.3.1 Wastewater Treatment ........................................................................... 372 11.2.3.2 Sunken Wastewater Treatment Tank ..................................................... 373 11.2.3.3 Chemical Storage Area ......................................................................... 373 11.2.3.4 Disposal Area ........................................................................................ 373 11.2.3.5 Other Considerations ............................................................................. 373
11.3 Site Assessment .................................................................................................................... 373 11.3.1 The Central Role of the State Agencies .................................................................. 374
11.3.1.1 State VCPs ............................................................................................. 374 11.3.1.2 Levels of Contaminant Screening and Cleanup .................................... 374
11.3.2 Performing a Phase I Site Assessment: Obtaining Facility Background Information from Existing Data ............................................................................. 376 11.3.2.1 Facility Records .................................................................................... 376 11.3.2.2 Other Sources of Recorded Information ............................................... 376 11.3.2.3 Identifying Migration Path Ways and Potentially
Exposed Populations ............................................................................. 377 11.3.3 Gathering Topographic Information ....................................................................... 378 11.3.4 Gathering Soil and Subsurface Information ........................................................... 378 11.3.5 Gathering Groundwater Information ...................................................................... 378
11.3.5.1 Identifying Potential Environmental and Human Health Concerns ..... 378 11.3.5.2 Community Involvement ....................................................................... 379 11.3.5.3 Conducting a Site Visit ..........................................................................380 11.3.5.4 Conducting Interviews ..........................................................................380
