Production at Walsh Mushrooms in Golden is still suspended while further rounds of testing are carried out. Up to 170 people are employed at the facility.
The company said today that they are not given direct access to the results of testing by the HSE.
"Staff were retested on Saturday and we are awaiting the outcome of this round of testing. Early indications suggest there are only a small number of positives, relative to the total number tested." Walsh Mushrooms said they are "working closely" with the relevant Government agencies to reopen as soon as possible "to safeguard the many jobs the site provides and supports in the area".