00000nam 2200000za 4500 9.830695 CaOODSP 20221107145605 cr ||||||||||| 170117s1989 oncabdo ob f000 0 eng d CaOODSP eng n-cn-bc NH18-1/370-1989E-PDF Assessment of the Takla Landing contour trench wastewater disposal system [electronic resource] / NovaTec Consultants Inc. [Ottawa] : Canada Mortgage and Housing Corporation, [1989] 47, [18] p. : ill., maps Research report "A report to: Canada Mortgage and Housing Corporation, Environment Canada, Health & Welfare Canada, Indian & Northern Affairs Canada, Takla Lake Band." "May, 1989." Includes bibliographical references (p. 47). 1. Introduction -- 2. Materials and methodology-- 3. Results -- 4. Discussion -- 5. Conclusions and recommendations -- Appendix I. Contour trench original design criteria -- Appendix II. Detailed drawings of liquid and biomat samplers and observation ports, and monitoring well locations -- Appendix III. Biomat photographs - March 1988 site visit -- Appendix IV. Report by project microbiologist. "A two year monitoring study of a community contour trench wastewater disposal system was carried out at Takla Landing B.C. The principal objective of the study was evaluate the effect of the following three trench bottom surface infiltrative media with regard to their ability of enhancing the formation of a biomat, or biological/organic material layer. The three media were: synthetic geotextile; the insitu material (a moderate to highly permeable sand/gravel); and a specified sand. Wastewater samples were collected using sampling devices located directly underneath the trench bottom and analyzed for BOD/COD, nutrients and bacterial quality. In addition, groundwater samples were collected from monitoring wells positioned downslope of the test section of the contour trench and the analytical data compared with the background groundwater quality with respect to nutrient and bacterial concentrations. Biomat samples were collected and analyzed for microbial activity and subjected to scanning electron microscopy (SEM)"--Summary, p. [4]. of cov. gccst Aboriginal reserves gccst Water management gccst Assessment NovaTec Consultants Inc. Canada Mortgage and Housing Corporation. Research report (Canada Mortgage and Housing Corporation : Online) (CaOODSP)9.506068 PDF 3.44 MB https://publications.gc.ca/collections/collection_2017/schl-cmhc/nh18-1/NH18-1-370-1989-eng.pdf