"substantial level of" is a grammatically correct phrase and can be used in written English.
It is often used to describe a large, significant or considerable amount or degree of something. Example: The company has achieved a substantial level of success in the past year, exceeding their financial targets by 20%.
"They are underestimating a substantial level of concern in the investment community regarding the offshore detention centres".
After acquisitions, the buildings generally require a substantial level of rehabilitation to rooms, building systems and common areas.
Ms. Bowie said the proposals in the Big Board report "will insure a substantial level of independent thinking on the boards".
There is, therefore, a reasonable argument that there should be a substantial level of support for strike action to overturn this default.
The brand's Facebook page has 18,500 likes and while Look Fabulous Forever has yet to start tracking how much money it has made as a result of the site, Tricia Cusden says it's driving a substantial level of business.
NLC/PI-Dac was much larger than NLC/PI, indicating a substantial level of drug loading.
The hydrocarbon gas was contained traces of H2S and substantial level of CO2.
Both subjects have a fairly substantial level of regularity regarding visiting similar set of destinations, as shown in Fig. 19.
The program is initiated whenever a natural disaster occurs and an American Red Cross assessment determines its relief effort will require a substantial level of support.
Electron probe microanalysis of both the MML layer and the wear debris indicates the presence of a substantial level of iron, transferred from the disc material.
One possible reason for no overall convergence is due to the substantial level of heterogeneity among OECD countries in both economic development and health expenditure.
