Cal. Public Resources Code § 9809

If the survey shows that the improvements are feasible, the directors shall cause to be prepared the following: (a) Plans and specifications of the improvements proposed to be constructed when the petition proposes the construction of improvements. (b) An estimate of the cost of the proposed improvements, which may include an amount not in excess of 10 percent of the aggregate cost of the proposed improvements to create a reserve fund to be used and applied as additional security for the payment of principal of and interest on any warrants of the improvement district issued against assessments levied for the payment of the cost of the proposed improvements. (c) Statement of the proposed assessment for the cost of the proposed improvements apportioned to each parcel of real property in the proposed improvement district as the parcels appear on the last equalized assessment roll and to district owned real property in the proposed improvement district whether or not it appears on the last equalized assessment roll, which assessments shall be apportioned in accordance with the assessed value of the real property, as such value is shown on the next preceding equalized assessment roll.