translate English to French: Where a MAC was less than levels considered to be reliably measurable or achievable, an "interim MAC" (IMAC) was established, and improvement in methods of quantitation and/or treatment was recommended.
Lorsque la CMA était inférieure aux quantités mesurables ou réalisables, on a fixé une «CMA provisoire» et recommandé l'amélioration des techniques de traitement des eaux ou de dosage des contaminants.