Designated plastic container
1. Type of containers
10 types of containers are available with different size and color: class-A (yellow, 10 L), class-C (green, 10 L), class-D (red, 10 L), class-E (blue, 10 L), class-F (green, 18 L), class-G (yellow 18 L), class-H (white, 10 L), class-I (red, 18 L) class-J (brown, 10 L), class-K (white, 18 L).
Designated containers have the UTokyo’s symbol mark, a concave to put manifest slip, a line to indicate full capacity, a line to indicate 97.5% of full capacity, punched 4 digits representing production date. On the shoulders are bar-code stickers to identify and manage the container. On the top of the container is a color tip that indicates the division/area the container belongs.
To get containers, contact the official of environmental safety administration at each division.
| Division | Tip | Division | Tip |
|---|---|---|---|
| Engineering | Light green | Arts and Sciences | Yellow green |
| IIS | Deep green | IMSUT | Dark brown |
| Sciences | Light blue | Asano area | White |
| Agriculture | Pink | Medicine | Red |
| Pharmaceutical Sciences | Grey | RCAST | Black |
| Hospital | Light yellow | Kashiwa and others | No tip |
| IQB | Orange | Engineerin bld3 | Fluorescent yellow |
| Sciences bld4, Bld.Inovation | Purple brown |
2. Expiration date for use
The containers are usable for 10 years after production. Check the 4-digit punching, and once it is expired replace with a new container. Expired container will be rejected at the collection by ESC. Currently usable containers are listed below.
Usable containers (as of July 2023)
| Class | Number |
|---|---|
| A (yellow, 10 L) | 1508 |
| C (green, 10 L) | 1309、1310、1409、1508、1606、1612、1801、1809、1903、2004、2202、2301 |
| D (red, 10 L) | 1606、1909、1910 |
| E (blue, 10 L) | 1310、2107 |
| F (green, 18 L) | 1309、1606、1909、2202 |
| G (yellow, 18 L) | 1309 |
| H (white, 10 L) | 1409、1605、1801、1809、2010、2301 |
| I (red, 18 L) | 1309、1801、2010 |
| J (brown, 10 L) | 1310、1409、1508、1612、2004 |
| K (white, 18 L) | 1310、1409、1508、1605、1606、1611、1809、1903、2010、2107、2202、2301 |
3. Washing and returning containers
Expired containers or unnecessary containers can be return to ESC after washing as described below. Basically the containers can be returned on the occasion of regular collection (up to 10 containers), but if large number of containers are to be returned, please contact ESC beforehand. Before you return, inform the official of environmental safety administration. If residues attached inside containers cannot be removed by wishing, consult ESC. Waste liquid after washing containers should be handled same as other laboratory liquid waste, but the content on the manifest slip can be written as “washing waste of class-X container”.
Washing of containers
| Class-A | Transfer the remaining in the old container to a new container. The old container does not require washing. Return on the occasion of mercury-containing waste collection conducted 4 times a year. |
|---|---|
| Class-C | Transfer the remaining in the old container to a new container. Wash the inside of the old container with water for 3 times. The washing waste solution should be collected and handled as class-C waste. |
| Class-D, -E, -F | Transfer the remaining in the old container to a new container. Wash the inside of the old container with water for 3 times. The washing waste solution should be collected and handled as class-F waste. |
| Class-G, -H, -J, -K | Transfer the remaining in the old container to a new container. Wash the inside of the old container with water for 3 times. The washing waste solution should be collected and handled as class-K waste. |
| Class-I | Transfer the remaining in the old container to a new container. The old container does not require washing.If residuals are found, remove them and handle as class-L waste. |