Operation of gravel and sand pits and crushed stone quarries

Title: Extraction of gravel, sand and crushed stone Includes the extraction, dredging, washing and processing of special sand for industry transforming and common construction sands; extraction and crushing of stones for aggregates used in construction; grinding of extracted stones to obtain powders on site of extraction. Does not include:  Extraction of oil shale (06100);  Obtaining limestone powder at the extraction site (08113);