General Contact Number: (530) 621-5567

Environmental Health

Bacteriological Sample Siting Plan Requirements

The following outlines the minimum requirements to be included in the Bacteriological Sample Siting Plan submitted to the El Dorado County Environmental Management Department, Division of Environmental Health, for approval and acceptance. If you have questions about preparing an acceptable siting plan, please call the Placerville Office at (530) 621-5300 or the South Lake Tahoe Office at (530) 573-3450.

An updated plan shall be submitted at least once every ten (10) years, or at any time the plan no longer ensures representative monitoring of the system. The purpose of the plan is to ensure that the Department and the water supplier agree on the monitoring requirements for the system and that the monitoring represents the water distributed throughout the entire system. A Bacteriological Sampling Siting Plan form shall be submitted with the following information.

General Requirement

The Bacteriological Sample Siting Plan must be representative of the water distribution system; describing sample site locations and including a statement about the training of the sample collector.

System Map

The plan is to be submitted with a distribution system map, street map, and/or system schematic. The system map must identify and show locations of the following (if applicable):

1. Sources of water supply.

2. Treatment facilities.

3. Storage facilities (state capacity in gallons).

4. All sample site locations (distinguish between routine and repeat sample points).

Note: For each routine sample point, there must be three (3) identified repeat sample sites, located within five (5) service connections "upstream" and "downstream" of the routine sample site. Also, indicate where sampling will occur in the following month after a total coliform positive sample--five (5) samples required.

5. Any pressure zones, booster stations, or pressure reducing stations located within the distribution system.

Other Required Information:

The bacteriological sample siting plan must also include the following:

1. Current number of service connections and number of population served.

2. Address or specific location information of each sample point.

3. Name of sampler (state experience and training or indicate that sampling training is needed).

4. Name of standby/relief sampler (state experience and training or indicate that sampling training is needed).

General Note:

When selecting a sampling tap, it is important to ensure that the tap is located in a clean environment. Consider protection from contamination by humans, animals, airborne materials, or other sources. Use outside faucets that are clean, have been in frequent use, are at least 18 inches above the ground and discharge downward. Do not sample through a hose.

All sample analyses must be done by a State approved laboratory.