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GPI
Columbia, MD 21044
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Our Story
Our main lines of business include: Engineers--Consulting, Sewage Treatment Plants, Surveyors.
GPI has been listed in the Blue Book since 2019.
What We Do
- Engineers--Consulting
- Sewage Treatment Plants
- Surveyors
Regions & Counties Serviced
- Washington D.C.
Maryland 1
- Howard
Our CSI Codes
01 32 23 - Survey and Layout Data
01 57 23 - Temporary Storm Water Pollution Control
01 89 13 - Site Preparation Performance Requirements
01 89 16 - Site Improvements Performance Requirements
01 89 19 - Site Plumbing Utilities Performance Requirements
01 89 23 - Site HVAC Utilities Performance Requirements
01 89 26 - Site Electrical Utilities Performance Requirements
01 89 29 - Other Site Construction Performance Requirements
02 21 13 - Site Surveys
02 32 19 - Exploratory Excavations
02 58 16 - Snow Avalanche Control
31 06 20.13 - Trench Dimension Schedule
31 10 00.00.01 - Site Clearing
31 14 13.23 - Topsoil Stripping and Stockpiling
31 23 13 - Subgrade Preparation
31 30 00.00.01 - Earthwork Methods
32 01 30 - Operation and Maintenance of Site Improvements
32 06 30 - Schedules for Site Improvements
32 30 00.00.01 - Site Improvements
32 71 00.00.01 - Constructed Wetlands
32 72 00.00.01 - Wetlands Restoration
33 06 40.13 - Storm Drainage Schedule
33 44 19 - Utility Storm Water Treatment
33 44 19.13 - In-Line Utility Storm Water Filters
33 44 19.16 - Catch Basin Insert Utility Storm Water Filters
33 44 19.19 - Utility Oil and Gas Separators
33 47 16.13 - Pond Covers
33 47 16.53 - Reservoir Covers
33 47 19.13 - Water Distribution Ponds
33 47 19.16 - Water Retainage Reservoirs
33 47 19.23 - Cooling Water Ponds
33 47 19.33 - Fire-Protection Water Ponds
33 47 23 - Sanitary Sewerage Lagoons
33 47 26 - Storm Drainage Ponds and Reservoirs
33 47 26.13 - Stabilization Ponds
33 47 26.16 - Retention Basins
33 47 26.19 - Leaching Pits
35 73 13 - Earth Embankment Dam
