EE ALLEGEDLY STRAINED LOWER BACK WHILE HELPING TO LIFT EMULSION TRANSFER PUMP FROM PICKUP BED TO GROUND. EE DID NOT SEEK MEDICAL ATTENTION UNTIL 7/26/02. DID NOT RECEIVE ANY MEDICAL TREATMENT & WAS RELEASED TO LIGHT DUTY. INJURY CURRENTLY UNDER INVESTIGATION TO DETERMINE IF IT'S A NEW INJURY OR AGGRAVATION OF AN OLD INJURY W/PREVIOUS EMPLOYER. INJURY DIAGNOSED AS ACUTE LUMBAR STRAI