Creating a state and county environmental partnership program for individual sewage treatment systems improvement and replacement; requiring counties to establish environmental partnership trust funds to provide financial assistance to property owners for ISTS site evaluation, design, installation, repair or replacement; specifying certain financial assistance limits; amount loaned plus interest to be a lien assessment against the property of improvement until repaid; specifying certain county notice requirements upon issuing of the loans; requiring counties to provide by ordinance for the right of property owners to prepay the lien assessment; specifying certain construction standards; authorizing counties to use remaining earnings from the trust funds for other environmental purposes; appropriating money to the pollution control agency (PCA) for interest free loans to counties for the program, limit, specifying a deadline for repayment (ra)