There could be some interference since the two technologies, Bluetooth and 2.4 GHz Wi-Fi, share the same 2.4 GHz frequency band, however the interference is strongly reduced if the Wi-Fi networks in the environment are deployed on 2.4 GHz Wi-Fi channels 1, 6 and 11 because, as you can see in the image below, the Advertisement Channels used by the BLE beacons fall in between the three Wi-Fi channels just mentioned. The BLE standard has been designed this way on purpose to reduce the interference.