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Thiết kế của bãi rác (ET) thoát hơi nước bao gồm phù hợp Trong khuôn khổ thường được sử dụng cho khắc phục bãi rác. Chương này bao gồm thiết kế thông tin đó là cụ thể để bao gồm ET. Mỗi trang web bao gồm bãi rác nên Đáp ứng yêu cầu để bảo vệ sức khỏe cộng đồng và môi trường trên nhiều thập kỷ hoặc Thậm chí nhiều thế kỷ. Nội quy, Quy chế Liên Bang (USEPA 1991) quy định các yêu cầu thiết kế quan trọng bao gồm bãi rác thông thường, và một mô hình. | 8 ET Landfill Cover Design Steps The design of evapotranspiration ET landfill covers fits within the framework normally used for landfill remediation. This chapter includes design information that is specific to ET covers. Each landfill cover should satisfy site requirements to protect public health and the environment over many decades or even centuries. Federal rules and regulations USEPA 1991 prescribe the important design requirements for conventional landfill covers and a model is accepted for their design Schroeder et al. 1994a b . As a result the accepted conventional covers tend to be similar to one another. The technology that governs performance of the ET cover dictates a unique design for each landfill cover so that it can meet the requirements of the site. Federal rules and regulations provide no guidance for alternative landfill covers. Each ET landfill cover is designed for its location. The four-step risk-based performance-based RB PB process described in Chapter 2 applies to ET landfill covers and should precede the following six design steps 1. Site characterization 2. Performance criteria 3. Cover type 4. Preliminary design 5. Site-specific design 6. Final design Because each site is unique these design steps may need modification or iteration of the steps for a particular site. 8.1 SITE CHARACTERIZATION Site characterization includes measurement and description of parameters that are important to the decision process and preliminary ET landfill cover design. It may include information listed in Table 8.1 and Chapter 2 Section 2.3. Characterization may involve two steps. The first is the information needed for site evaluation and preliminary design it should be relatively brief and inexpensive. The second is for final design and requires additional measurements it may require substantial amounts of time and expense. 99 2009 by Taylor Francis Group LLC 100 Evapotranspiration Covers for Landfills and Waste Sites TABLE 8.1 Site Characteristics That .