Dominion 2L Termiticide is applied at 0.1 to 0.2 fl oz per inch of trunk diameter for trees at the base of the tree inside the drip line. Apply uniformly around the base of the tree in no less than 10 gallons of water per 1000 square feet. Direct application to the root area. Even if the trees are close, as long as you are applying the correct rate per the diameter of each tree, with enough water, that is what matters. Please read the product label for complete application instructions.
Dominion 2L Termiticide Concentrate would only be used to trench around the inside wall of the crawl space as well as around any pillars. It would not be broadcast across the entire area.
Dominion 2L would not work for elm bark beetles as it would not reach to the areas of the trees these beetles infest. Effective treatment involves killing the beetles before they bore into bark in fall and when they first emerge in spring so protecting healthy trees is best. Timing is critical to reach the pests before they're under the protective bark. You can use a product like Permethrin SFR for this. There are also articles linked below that can help
https://ag.umass.edu/landscape/fact-sheets/elm-bark-beetle
https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5347208.pdf
You can use Dominion 2L to treat trees and shrubs for chinch bugs. Most people use a 5 gallon bucket or a large watering can to apply Dominion as a soil drench. You will need 0.1 to 0.2 fl. oz. (3 to 6 mL) of Dominion per foot of shrub height or 0.1 to 0.2 fl oz per inch of trunk diameter for trees. The amount of water that is used will vary depending on soil conditions and volumes that are easy for applicators to use. The minimum amount of water that should be used is 1 pint per foot of shrub height (or inch of trunk diameter for trees) but you may use 1 quart -1 gallon of water per foot of height (or inch of trunk diameter for trees) as well. Denser soils such as clay do not accept water as readily, so the lower volume of water is suggested. Since sandy soils can accept more water, using the higher volume of water is preferred. After the soil drench has been applied you should water it in with at least 1/2 inch of water. Note: Water simply acts as a carrier and it is important that even distribution of the product is achieved. Thus, more water may be used if the applicator feels runoff will not occur and proper penetration of the root zone is achieved. Insecticides applied to the soil are taken up by the roots and translocated throughout the tree or shrub. Root/soil drenches offer the advantage of requiring no special equipment to apply (other than a bucket or watering can). However, surface layers of organic matter, such as mulch or leaf litter, can bind the insecticide and reduce uptake. Before applying drenches, it is important to remove or pull back any mulch or dead leaves so the insecticide solution is poured directly on the mineral soil. It is also important to keep the soil around the tree or shrub moist for the next 7-10 days after applications to encourage uptake. We also recommend using a product with an active ingredient that is different than the soil drench for a foliage application while you are waiting for the Dominion to translocate through the ficus. Talstar P is the most popular choice for foliage application on ficus for white fly.
A systemic application of the Dominion 2L would not harm the bees or birds as it would only be absorbed by the types of insects that actually feed on the tree down past a certain level of the trees outer layers.