Once you have each layer defined with the survey you want to set the north compass to the green axes. Next, you want to import the google earth texture to compare and add to your site.
Import the geolocation of your site from google earth which has a tool specifically for that in SketchUp. You don't want the 3D terrain for the time being so you can just hide that temporarily.
Make sure you set the green axes to north on the geolocated texture.
To find the exact direction of North you can use the coordinates from the survey and then work off of the predefined lines in the site survey.
If your site survey has a north direction other than the green axes and it is important for you to have accurate shadows you need to do these steps.
You will need to clear the shadows setting from the scenes bar so that they can be reconfigured. Using the solar north plugin. Adjust your compass from the site plan and rotate the image to match the green axes.
Next, you can review your geolocated texture and the site plan and manually add in other objects that you wish.
Optimizing contour lines. SketchUp has a built-in tool that allows you to create terrain from contour lines. This is optional but will create more perspective while designing and will give you more ideas for the building. You want to create more than enough contour lines so that you will have space enough for your building and for Layout documentation.
Since you are drawing more terrain than needed you don't need to be precise. So this means you can manually draw them out with the freehand tool.
Now use the sandbox, from contours tool and elevate it into a 3D object