To avoid the possibility of such an ineffective situation, we provide a Rough Order-of-Magnitude (ROM) Estimate of costs and time when Requirements are not specified in the early stages of the project. The ROM Estimate is based on Vision document that includes a list of Features. Parameter.
Continued on next page. If your water smells like rotten eggs, it may. be contaminated with hydrogen sulfide (H 2S). Though H 2 S contamination at the concentrations. found in domestic drinking water supplies usually. does not pose a health risk, it is still a nuisance. and gives water a rotten egg smell and taste.
The odor of water with as little as 0.5 ppm of hydrogen sulfide concentration is detectable by most people. Concentrations less than 1 ppm give the water a musty or swampy odor. A 1-2 ppm hydrogen sulfide concentration gives water a rotten egg odor and makes the water very corrosive to plumbing. Generally, hydrogen sulfide levels are less than 10 ppm but have been reported as high as 50 to 75 ppm.