Any health department operating under the provisions of this article is empowered to seek and accept grants, bequests or donations of money and resources from private persons in support of projects conducted under the auspices of the Virginia Health Care Foundation or other preventive or primary health care projects. A separate fund shall be established so as to segregate the amounts appropriated and the amounts bequeathed or contributed thereto. No portion of this fund derived from private contributions or bequests and designated for support of Virginia Health Care Foundation projects shall be used for any other purpose. Any money remaining in this fund at the end of the biennium shall not revert to the general fund but shall remain in the fund described herein. Interest earned on such moneys shall remain in this fund and be credited to it. Money bequeathed or contributed to this fund shall not be used to supplant local or state appropriations.