Selecting the proper size tank is done by relating the number of sinks and drains
that are being discharged into the system, to the capacity of the tank. According to
ASPE, Chapter 32, tanks are to be sized to provide a "dwell time" of 2½ to 3 hours.
Based on this dwell time, ASPE has developed a sizing table which has been summarized below.
Tanks should not be sized based on the number of sinks or drains alone. Certain type of waste
may require particular needs and may not fall within the standard sink to tan ratio.
Other factors which can affect the tank size are amount of flow through the system piping commercial
and industrial laboratories the number of lab stations in the table below should be divided by
two. A qualified engineer should make the final determination of tank size.
| Lab Stations (#) |
Tank Size (gal) |
Limestone (lbs) |
| 2 |
5 |
50 |
| 4 |
15 |
150 |
| 8 |
30 |
250 |
| 16 |
55 |
500 |
| 25 |
100 |
1000 |
| 42 |
150 |
1700 |
| 55 |
180 |
2000 |
| 65 |
200 |
2500 |
| 80 |
275 |
3600 |
| 110 |
360 |
4500 |
| 150 |
500 |
6000 |
| 200 |
600 |
7500 |
| 350 |
1200 |
14500 |
| 700 |
2400 |
30000 |
|
