CALL US TODAY Martinez, CA (925) 313-5800 | Signal Hill, CA (562) 427-6899 Menu RESOURCES CPT Guides 6th Edition Geotechnical 2nd Edition Envrionmental Ground Water Depth Tables Northern California Southern California Licenses & Insurance Gregg Drilling maintains a valid C57 license as a contractor in the State of California. Gregg’s C57 license number is: 1044456 We are licensed contractors in the following states: Alaska Arizona California Georgia Louisiana Minnesota Nevada New Mexico Oregon South Carolina Texas Washington We also carry extensive insurance coverage, which includes general liability, automobile, workers compensation, and contractor’s pollution insurance. Copies of our licenses and certificates of insurance are available upon request. Permitting California County Well Drilling Permit Requirements The well drilling permit requirement information contained on this page is provided by Gregg as a courtesy to clients and the general public. Please be advised that we do not guarantee the accuracy of the information and use of this information is at user’s own risk. If you should find inaccuracies in the information please email us. Alameda Alpine Amador Butte Calaveras Colusa Contra Costa Del Norte El Dorado Fresno Glenn Humboldt Imperial Inyo Kern Kings Lake Lassen Livermore Los Angeles Madera Marin Mariposa Mendocino Merced Modoc Mono Monterey Napa Nevada Orange Placer Plumas Riverside Sacramento San Benito San Bernardino San Diego San Francisco San Joaquin San Luis Obispo San Mateo Santa Barbara Santa Clara Santa Cruz Shasta Sierra Siskiyou Solano Sonoma Stanislaus Sutter Tehama Trinity Tulare Tuolumne Ventura Yolo Yuba Technical Datasheets For quick access to the specifications of our equipment capabilities and services, view or print any of the data sheets listed below. 10cm CPT Procedure 15cm CPT Procedure Air Vacuum Analyzing & Mitigating Liquefaction BAT Groundwater Sampling Cone Technologies Conversion Factors CPT Data & Interpretation CPT Equipment CPT Interpretation Difficult Access Drilling Dilatometer Direct Push & Limited Access Exploration/Mining Services Geonor Field Vane Test (VST) Groundwater Sampling Hollow Stem Auger Equipment Hydraulic Fracturing Hydrocore International Services Marine Equipment Maxi SimulProbe® Membrane Interface Probe Mini Simulprobe® Pressuremeter Rotary Seismic Cone Penetration Testing (SCPT) Soil Sampling Soil Sampling - Push, Wiggle, Slam, Twist Specialized Testing SPT Energy Calibration Tracked CPT Equipment Unified Soil Classification UVOST Volume, Weights, & Dimensions Well Service Equipment © 2017 Gregg Drilling LLC. All Rights Reserved. Site created by Logical Position

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