The generator matrix

 1  0  0  1  1  1  1  1  1  1  1  1 2X  1  1  1  1  X  0  0  1  X  1 2X  1  1  1 2X  1  1
 0  1  0  0  X 2X+1 2X+1 2X+2  2  1  2 2X  1  1 2X+2  2 2X  1  1 2X  1  1  0  0  X 2X+2  1  1  X 2X
 0  0  1  1 2X+2 2X X+2 2X+1  2 X+1  0 2X+1  X  1 X+1  2  0 2X+1 2X+2  1 2X 2X+2 X+2  1  0 2X X+2 X+1  2  1
 0  0  0 2X 2X  0 2X  X  X 2X 2X  0  X  X  0  0  X 2X 2X 2X 2X  0  X  X  X  X  0  0  0  X

generates a code of length 30 over Z3[X]/(X^2) who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+360x^54+560x^57+464x^60+384x^63+340x^66+76x^69+2x^72

The gray image is a linear code over GF(3) with n=90, k=7 and d=54.
This code was found by Heurico 1.13 in 0.0163 seconds.