Dilute Specimen. A specimen with creatinine and specific gravity values that are lower than expected for human urine. A dilute test will be reported as positive or negative. For a positive dilute test the employer treats the result as a positive test and removes the employee from safety-sensitive duty. For a negative dilute test, the employer may require, as a matter of policy, employees to retest without direct observation. The second test is the test of record, even if the second test is also negative dilute.
Dilute Specimen. A “dilute” or a “negative dilute” test will require the Employee to go through an unannounced re-collection and test. This may be administered under direct observation by the MRO. Following federal models, a “positive dilute” will normally be treated as a positive test.
Dilute Specimen. A urine specimen with creatinine and specific gravity values that are lower than expected for human urine.
