Was my grandfather injured in the Port Chicago San Francisco Explosion in July 1944?

Hello. My grandfather was honorably discharged from the USCG San Francisco in August 1944. We know he lost his vision in one eye in an explosion but we don't know any other details. We suspect that it happened during the Port Chicago Explosion in July 1944. Can anyone please recommend how I can verify this? www.spk.usace.army.mil/.../