22 O and M Manual NJA23013900 August 2025

PROBABLE ANNUAL COSTS FOR INSPECTION AND, PREVENTIVE & CORRECTIVE MAINTENANCE OPERATION AND MAINTENANCE OF STORMWATER MANAGEMENT STRUCTURES Location: Lot 5 in Block 157 in the Township of West Orange, Essex County, New Jersey QUANTITY INSPECTION Monthly inspection for excessive grass growth Quarterly Inspection for clogging, damage,sedimentation Inspection for clogging, ponding, sedimetation after storm event exceeding 1" Annual inspection for erosion,scour & damage Annual time-to-drain tests, condition of outlet valves PREVENTIVE AND CORRECTIVE MAINTENANCE Mow/Trim grass Unblock and vacuum stormwater inlets Clean, unblock, and remove sediments from Manhole Clean, unblock, and flush stormwater pipes UNIT UNIT COST 12 Visit 4 Visit 5 Visit 1 Visit 1 Visit Annual Inspection costs 0.7 1 1 1,037 Acres No Lumpsum FT TOTAL COST $250.00 $250.00 $250.00 $250.00 $250.00 $3,000.00 $1,000.00 $1,250.00 $250.00 $250.00 $5,750.00 $50.00 $20.00 $1,500.00 $0.75 $35.00 $20.00 $1,500.00 $777.75 Note: Maintenance shall be carried out when and to the extent of the situation as it arises. G:\2023\NJA230139.00\Admin\Reports\O&M Manual\O&M Documents\O&M OPC (1).xlsx