Section 305(b) requires each state to prepare a water quality assessment report every two years. The Environmental Protection Agency (EPA) compiles the information from the state reports and prepares a summary for Congress on the status of the nationâs waters.
Carcinoembryonic antigen (CEA) is a cancer marker. ( 1 See above under cancer markers.) 2  DR-70 is a simple blood test - (See above). 3  Hemoccult Test for colorectal cancer tests for blood in the stool. A positive finding warrants having further tests, like a colonoscopy or sigmoidoscopy to detect polyps and tumors. This test can be performed by almost any doctor's office.
Several different tests can be used to screen for colorectal cancers. These tests can be divided into: 1  Tests that can find both colorectal polyps and cancer: These tests look at the structure of the colon itself to find any abnormal areas.2  This is done either with a scope inserted into the rectum or with special imaging (x-ray) tests.olorectal cancer cells often contain DNA mutations (changes) in certain genes. Cells from colorectal cancers or polyps with these mutations are often shed into the stool, where tests may be able to detect them. Cologuard â¢ , the test currently available, also tests for blood in the stool.