We were taught in ServSafe class to avoid any possibility of cross contamination to prevent people with seafood allergies being affected. So, if deep frying seafood and chicken, use separate fryers. If grilling, use separate surfaces. Not worth the legal hassles or the bad publicity.
Craig...Chargriller Pro w/SFB, 2001 Weber 22.5 OTP, Weber OTS 18.5, Broilmaster gasser
"The Lord your God is with you, he is mighty to save. He will take great delight in you, he will quiet you with his love, he will rejoice over you with singing.” Zephaniah 3:17