to interpret ELISA test report?

How to interpret ELISA test report?

I got the test result for ELISA. It goes like this:

PARAMETER OBSERVED VALUE UNIT REFERENCE RANGE
------------------------------------------ ----------------
HIV ELISA* Negative Cut off value:0.4

Test OD .003 OD Ratio

1. Can someone please explain me these values? I suppose I am clean and don't need any WB test.
2. I heard ELISA test takes few days. But they gave me the result within 8 hours. Is this normal?

Thanks.