A 100-mL water sample is collected from a municipal wastewater treatment plant's biological aeration treatment reactor. The sample is placed in a drying dish (weight = 0.5000 g before the sample is added), and then placed in an oven at 104°C until all the moisture is evaporated. The weight of the dried dish is recorded as 0.5625 g. A similar 100-mL sample is filtered and the 100-mL liquid sample that passes through the filter is collected and placed in another drying dish (weight of dish before sample is added is also 0.5000 g). This sample is dried at 104°C and the dried dish weight is re-corded as 0.5325 g. What is the concentration (in mg/L) of
(a) total solids?
(b) total suspended solids?
(c) total dissolved solids? and
(d) volatile suspended solids? (Assume that in the aeration basin, VSS = 0.7sTSS.)