perhaps also hybrids? The Census lists A. dealbata × Acacia parramattensis but I'm suspicious there might be more hybrids among bipinnate wattle species....
I agree it is A. parramattensis, because the number of pairs of pinnae is below the range given for A. mearnsii. Seems both species are very variable in appearance of foliage and placement of glands, and overlap in range for everything.