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7.2.1. Months 7 - 11
- The key to keep costs low during construction is to make the construction period as short as possible. This means planning steps in advance including contracts, labor and materials.
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The construction manager needs to be on the site when construction is proceeding.
- The project director visits the site each day during the construction period.
- The wastewater recycling consultant needs to be available for periodic consultation, as do agronomist and aquaculture expert.
- Construction and operations overlap in the final 60 days.
Construction steps and sequence include:
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Day 1 - 30 Begin log book. This includes a record of work done on site each day, decisions taken on site, and weather conditions. The log is maintained by the operator/trainee under the project director. Move detailed working drawings onto site. Security on site at night. Electrify the site. Fresh water line on site. Fence and storage shed materials delivered to site. Construct equipment/security shed & running water source. Construct fence around site. Construct drainage channel around site if necessary and if not already done during the survey aspect of planning. Move top soil to save for garden if this was not already done during the survey aspect of planning. Avoid extra disruption of soil around pond and biogas digester locations. Existing compacted soil forms a good water barrier. Destruction of this barrier requires additional compacting later. Stake the area for excavation and structures. Check staking with project director, contractor.
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Day 31 - 90 Move heavy machinery on site if required. Excavation of ponds in the sequence listed in the Construction section of this website. Check and stake levels after each excavation. Photographic documentation of finished pond excavation. Deliver materials to site for gates, office, accommodation, storage shed, biodigester, animal sheds, water lines. Construct structures simultaneously with ponds. Construction inspection after excavation complete. Change construction drawings as required. Check soil composition as excavation proceeds. Photographic documentation daily of new construction. Construct water barriers on pond walls & floors if necessary. Construct pond gates. Construct canals between ponds. Spread topsoil on garden area. Install irrigation system in garden. Finalize operator contract with municipality. Operator moves on site. Start operations log book.
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Day 91 - 150 Bring tree seedlings on site and plant - this is a key procedure to do as soon as possible, as trees require 1-3 years to begin producing. Establish operating financial routine per the Operation Section of this website. Deliver operating equipment to site per Operations equipment list. Interim construction inspection before filling ponds. Check operating section of this guide for sequence to use before filling ponds with wastewater. Check ponds, canals, flow areas for blockage, garbage. Report to community association, municipality. Fill ponds with wastewater & observe filling process carefully. Amend working construction drawings to show changes during construction. Interim wildlife inspection. Preliminary pathogen, nutrient tests in ponds, inlet, outlet before adding fish, macrophytes. Obtain macrophytes from a local river, lake or facility as identified in planning stage. Macrophytes in ponds. Check fish ponds for unwanted species. Check oxygen levels in fish ponds. Obtain fish from local fish farm, weigh & inspect. Put fish in ponds after proper acclimatizing. Garden soil preparation. Plant garden, dykes. Construction defect inspection & list Report to municipality, community association.
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Wastewater Recycling in Tropical Regions
©Copyright 1998-2008 Aquasol International Ltd., Hamburger Umweltinstitut e.V. & O Instituto Ambiental
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