California Code of Regulations
Title 27 - Environmental Protection
Division 2 - Solid Waste
Subdivision 1 - Consolidated Regulations for Treatment, Storage, Processing or Disposal of Solid Waste
Chapter 4 - Documentation and Reporting for Regulatory Tiers, Permits, WDRs, and Plans
Subchapter 4 - Development of Closure/Postclosure Maintenance Plans
Section 21790 - CIWMB-Preliminary Closure Plan Contents

Universal Citation: 27 CA Code of Regs 21790

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

(a) The purpose of the preliminary plan is to provide a basis for the operator to establish a preliminary estimate of closure costs certified for accuracy by a registered civil engineer or certified engineering geologist, and enable the CIWMB to assess the reasonableness of the cost estimate for non-water quality aspects of closure.

(b) The plan shall identify the steps necessary to perform either partial final closure, in accordance with § 21120, or complete landfill closure and shall include, but is not limited to, the following information:

(1) a closure cost estimate pursuant to §§ 21815 and 21820;

(2) location maps indicating property boundaries and the existing, permitted, and proposed final limits of waste placement; entry roads; and structures outside the property boundary but within 1000 feet of the property boundary. A location map shall also be included showing the general location of the landfill;

(3) [Reserved];

(4) a location map of the current monitoring and control systems including: leachate control and drainage and erosion control systems as required pursuant to chapter 3 (§ 20180 et seq.); landfill gas monitoring and control systems as required pursuant to chapter 3 (§ 20180 et seq.);

(5) a description of proposed postclosure land uses;

(6) an estimate of the maximum extent of the landfill that will ever require closure at any given time during the life of the landfill;

(7) an estimate of the closure date based on volumetric calculations, including supporting documentation. The estimate shall account for the effects of settlement and for volume occupied by daily cover material; and

(8) a preliminary description of closure activities including schedules for implementation. The activities described shall include, but are not limited to:

(A) site security and structure removal pursuant to §§ 21135 and 21137;

(B) final cover and grading pursuant to §§ 21140 and 21142. The description shall include type of materials and estimate of the volume or amount needed of each type of material. If on site materials are planned for use in the final cover for the low permeability layer, test results confirming the suitability of such materials shall be included;

(D) drainage and erosion control systems pursuant to § 21150;

(E) landfill gas monitoring and control systems pursuant to Article 6, Subchapter 4, Chapter 3 (§ 20920 et seq.);

(F) leachate monitoring and control measures pursuant to § 21160.

1. New section filed 6-18-97; operative 7-18-97 (Register 97, No. 25).
2. Change without regulatory effect amending subsection (b)(4) filed 3-8-99 pursuant to section 100, title 1, California Code of Regulations (Register 99, No. 11).
3. Amendment of section heading, subsection (b)(1) and NOTE filed 2-25-2008; operative 2-25-2008 pursuant to Government Code section 11343.4 (Register 2008, No. 9).

Note: Authority cited: Section 40502, Public Resources Code. Reference: Sections 43020, 43021 and 43103, Public Resources Code.

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