Is there a typical soil resistivity for Wilmington?+
No citywide value can represent a parcel, substation, route, or facility. Wilmington lies near the transition between Piedmont rock and residual soil and Coastal Plain sand, silt, and clay. That transition, together with industrial fill, can create route-to-route soil electrical-resistivity variation. Field measurements must be tied to the actual array, location, spacing, orientation, and current condition.
Does Wenner electrode spacing equal test depth?+
No. Larger spacing generally samples a larger earth volume, but spacing is not an exact one-to-one depth. Layering, array geometry, site boundaries, and conductive features affect the apparent response.
What information is needed to scope a Wilmington survey?+
Send the site plan, survey objective, grounding or corrosion design request, proposed stations and spacings, final grading information, candidate line corridors, utility-clearance responsibility, access rules, schedule, and required report format.
Can Calicore mobilize outside California?+
Yes. Calicore performs project-based Wenner field programs throughout the United States when the station count, spacing, access, schedule, and mobilization are practical.
