An industry has several sewer connections with the following discharges: 300gpd, 75gpd, 725gpd, 1200gpd, and 200gpd. What is the flow weighted composite sample volume from each connection required if a total of 5 liters is needed?

To determine the flow weighted composite sample volume required from each sewer connection when a total volume of 5 liters is needed, one needs to first understand the concept of flow weighted sampling. This approach ensures that the contribution of each stream to the total sample is proportional to its flow rate.

In this scenario, we start by calculating the total flow from all the connections. The flows are 300 gallons per day (gpd), 75 gpd, 725 gpd, 1200 gpd, and 200 gpd. When we add these together, the total flow rate sums up to 2500 gpd.

Next, the volume of each sample to be taken is proportionate to each connection's flow against the total flow. Given that the total desired sample volume is 5 liters, we need to allocate this volume based on the flow rates. The volume for each connection can be calculated using the formula:

Volume from each connection (liters) = (Flow from the connection / Total Flow) × Total Sample Volume

Now, converting flow rates from gpd to a consistent unit that allows for the total volume to be understood in a suitable context (liters).

While the calculations show that for each flow:

1. For the