When you write, only add one adjective in the part of the sentence you are interested in so as not to dilute meaning.
Say “The new product was built at the Riverdale Factory” if we want to say the product is new.
Say “The product was built in the modern Riverdale Factory” if we want to say the factory is modern.
Don’t say “The new product was built in the modern Riverdale Factory” because attention falls neither on the product nor on the factory. When you want to emphasise on everything you end up emphasising nothing!
Read Andrew’s book on how to improve your business English here https://www.amazon.es/stores/Andrew-D.-MIles/author/B00B0NF18W and study business English at Andrew’s school here https://www.englishforbusiness.biz