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xvii Chapter 1: Introduction  1 Chapter 2: Background of Community and Project  3 2.1: Community Background  3 2.2: Sanitation and Water Sources in Santa Elena  5 2.2a: Sanitation  5 2.2b: Water Sources  5 2.3: Project Background/Story  6 2.4: Pilot Latrine-PCV’s Personal Composting Latrine  7 2.5: Construction of Commission Member’s Latrines  8 2.6: Project Funding  11 2.7: Affordability of Project  11 2.8: Materials Chosen  11 Chapter 3: Construction Manual of Double Vault Composting Latrine  12 3.1: Construction Schedule  12 3.2: Loza Construction (0.5-1day)  12 3.2a: Construction Steps  13 3.3: Vault Construction (2-3days)  15 3.3b: Construction steps  16 3.3b: Stucco (Revoke)  25 3.4: Housing Structure Construction (2-3 days)  27 3.4a: Framework (1-2days)  27 3.5: Ventilation Tubes Installation (1-2hrs)  34 3.6: Stairs Construction (1-3 days)  35 3.6a: Wooden Stairs (2-3days)  35

DOUBLE VAULT COMPOSTING LATRINES IN RURAL PARAGUAY : FEASIBLE CONSTRUCTION AND OPTIMAL USE