Pathogen Environmental Monitoring Program

We are a fresh-cut facility with RTE arils and use Primus. As of this year 2026, is it necessary to test for pathogens such as salmonella and e.coli in zone 1? A positive in this area will result most likely result in a recall since we are dealing with fresh cut fruit, right? would it be okay to consider just testing for pathogens in zones 2,3 and 4? Zone 1 would be tested for listeria spp (Listeria spp also tested in zones 1,2,3 and 4) and for indicators as well (TPC).  The final product is tested for pathogens (Salmonella and E.coli as well as listeria spp).                                                             

Also, the method used by the lab would be BAX (PCR), which would render the positives a "presumptive positive." right?  However, this should be treated as a positive, since a reputable lab is being used, right?