Preliminary Methane Investigation Protocol
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Preliminary Methane Investigation Protocol

COUNTY OF RIVERSIDE - HEALTH SERVICES AGENCY
DEPARTMENT OF ENVIRONMENTAL HEALTH

Preliminary Methane Investigation Protocol - January 19, 2001

Introduction:

Persons or entities (hereinafter “applicants”) seeking an entitlement under Ordinance Nos. 348 or 460 shall, prior to approval, conduct a preliminary analysis pertaining to site use and the possible presence of methane gas. The purpose of the analysis is to apprise the County of potential methane problems. The analysis may also assist applicants in siting specific land uses and may give them an early indication of methane mitigation costs.

Soils testing is not required, but may be performed as part of the preliminary analysis. The results of such testing shall not, however, be used to determine appropriate methane mitigation. The County shall continue to require post-grading, lot-by-lot methane testing (particularly for residential lots) to make this determination.

Post-grading testing may only be waived if it can be established to the County’s satisfaction that the area in question was never used as a dairy, poultry ranch, hog ranch, livestock feed operation, manure stockpile site, manure burial site, or for any other purpose that might result in the deposition of materials which could produce significant methane.

Areas Subject to Protocol:

Only properties within the boundaries of the following areas are subject to this protocol:

Area 1: North of the Santa Ana River , South of the Pomona Freeway , East of Hellman Avenue and West of Etiwanda Avenue.

Area 2: North of Esplanade Ave., South of Gilman Springs Road , East of Davis Road/Hansen Ave. and West of State Street

Area 3: South of the San Bernardino County Line, East of Interstate 10, West of Oak Glen Road and North of 14th Street (Beaumont/Banning).

Preliminary Analysis Requirements:

Applicants shall provide to the Departments of Planning, and Building and Safety Safety and Environmental Health Departments a report addressing whether the property in question was ever used as a dairy, poultry ranch, hog ranch, livestock feed operation, manure stockpile site, manure burial site, agricultural pond or for any other purpose that might result in the deposition of materials which could produce significant methane. The report shall be prepared and signed by a licensed engineer, geologist or registered environmental assessor and shall, at a minimum, include the following (the County may, at its discretion, request additional information):

1. A description of current site uses and site condition.

2. Photographs of current site uses and site condition.

3. A description of historical site uses and site condition, including a summary of statements and interviews with previous owners, employees, etc. specifying the location of potential methane generation areas, if any.

4. Historical aerial photographs (at least one per decade), if available.

5. Detailed maps plotting the potential methane generation areas described above.

6. An overlay of the entitlement map to compare with potential methane generation areas.

Note:The County reserves the right to modify this protocol as new issues emerge and new information becomes available.

Last Updated: 1-19-01