It is a rather common phenomenon to have leaking pipeline network of drains in old residential quarters. When sewage leaks, it is likely to corrode pipelines of water and gas supplies, generate stinking smells, pollute daily drinking water quality, damage human settlement, and cause serious impacts on surrounding residents’ life.
Since July 2015, the Environmental Resources Institute and the Community Development & Construction R&D Center of our institute organized a joint project team, which carried out resident interviews and site surveys regarding the drainage network leakage in the Xikang Road West Community on Peony Road, and detected the drainage network leakage problem in more than 50 gutters within the community. In order to further study the environmental impact caused by the network leakage, our institute’s project team consulted specialists and a great deal of literature in this field, and invited a 3rd
-party testing agency to examinethe thickness of the stinking smell and the daily drinking water at the two spots with the most serious leakage.
Serious leakage of the drainage network in a residential building causes wastewater silting-up in the gutter.
Testers collecting gas samples to make preparations for testing stinking smells
For the stinking smell testing, the testers performed tests on the stinking smell in all the nine indicators based on the “Stinking Pollutant Discharge Standards (GB14554-93)”. Of the nine indicators for foul smell, only the thickness of the foul smell exceeded the standards. The two testing spots were 49 (non-dimensional) and 53 (non-dimensional) respectively, which failed to conform to the required 30 of standard. Excessivefoul smell is hazardous to human health to some extent, causing people to feel unpleasant by stimulating human sense of smell, and resulting in adverse effects on the respiratory system, the digestive system, the nervous system, etc. of the human body. The daily drinking water quality standards were based on the “Daily Drinking Water Quality Standards (GB5749-2006). The 40 conventional indexes were applied except two related to radioactivity. The testing data showed that all the indicators under surveillance conformed to the standards.
Testers performing on-site tests to analyze some of the drinking water quality indicators
Based on the above research results, it is believedthat the drainage network leakage in some old residential quarters on Peony Street caused foul gas discharge beyond standards and resulted in some impacts on surrounding residents’ life. Next, the project team will continue to pay attention to the problem, analyze the causes of the drainage network leakage, and propose feasible solutions.