Figure 10-1. - Illustrations of laboratory apparatus.

and are cited in the discharge permit. The normal procedures for these tests are given in the Standard Methods for the Examination of Water and Wastewaters and the Methods of Chemical Analysis of Water and Wastes published by the EPA.

LABORATORY EQUIPMENT

Examples of the various types of laboratory equipment are shown in figure 10-1. In order for the operator to conduct accurate sewage tests, the laboratory must be equipped with a minimum of equipment. Table 10-10 lists the types of equipment needed for some of the basic laboratory tests.

The operator should always maintain (his equipment in a high state of repair and cleanliness, Any contamination of the test equipment may adversely affect the results. Refer to the