As a Mentat in service to House Atreides, your expertise is vital to the success of spice harvesting operations on Arrakis. However, a recent sandstorm has caused severe corruption to a crucial spice analysis document, known as spice_analysis.csv. This file contains essential data on spice quantity and purity, crucial for ensuring the smooth production of the precious spice melange. Your task is to repair the corrupted file and extract the necessary information to maintain the efficiency of spice production.