environmental drilling program

Frequently Asked Questions

1. What is environmental drilling?

Environmental Drilling is used to determine the existence of contamination in soil or groundwater. Discrete undisturbed soil and groundwater samples are recovered from the subsurface in order to evaluate, monitor and remediate contamination impacting the environment.

2. Do I need a permit to drill environmental borings and wells in Sonoma County?

Generally yes, but some exceptions may apply.

3. What do I need to submit with my Application for Drilling Permit?

The permit application must have the original signature of the C-57 licensed contractor. Permit applications must include access agreements or encroachment permits for all offsite work.

For Regional Water Quality Control Board (RWQCB) lead sites, the appropriate fee, a copy of a concurrence letter for the proposed work, a copy of a workplan, a site safety plan, and a plot map must be submitted.

For Environmental Assessments, the appropriate fee, a copy of a workplan, a site safety plan, and a plot map must also be submitted.

For Local Oversight Program (LOP) lead sites, a concurrence letter for the proposed work, a workplan and site safety plan must be on file with the Environmental Health Division. Please do not resubmit these documents if they are on file. No permit fees are required for LOP lead sites when the work is directed by LOP staff.

4. What is an Attachment 3 and when is it needed?

An Attachment 3 is an exemption from the Sonoma County Well Ordinance for wells proposed within setbacks from a sewage disposal system. If you check “Yes” on the permit application for monitoring wells being constructed within 100 ft. of a septic tank or leachfield, 50 ft. of any sanitary sewer line, or 25 ft. of any private sanitary sewer line, then an Attachment 3 form must be submitted with the permit application.

5. Can I get an Attachment 3 form online?

Yes. There is an Adobe Acrobat (PDF) version online that you can print and fill out.

6. Can I get a permit application online?

Yes. There is an Adobe Acrobat (PDF) version online that you can print and fill out. Please note, however, that an original signature is required on the permit.

7. What is the typical turnaround time to get a permit issued?

It is the Division’s goal is to issue permits within 2-3 weeks. However, permit issuance may take longer if all the pertinent information is not provided upon the initial submittal.

8. Can I pay a fee to expedite a permit?

No, there is not a mechanism to pay for expediting permits.

9. How do I find out if my permit has been issued?

Call (707) 565-6565 and the clerical staff can check if a permit has been issued.

10. Do I need to schedule an appointment for a grout inspection?

No. We do not set appointments for grout inspections, however, you are required to notify this office at least 48 hours in advance of the work.

11. Who do I contact regarding technical issues and notification?

For Local Oversight Program (LOP) sites, contact the caseworker for your site. For Regional Board lead sites or Environmental Assessments, contact John Anderson.

12. How do I determine how much to pay for my permit?

Permits for LOP sites are fee-exempt when the work is directed by LOP staff. For all other permitting, refer to the fee schedule. Please note that the fee for the first well is a higher rate than subsequent wells. This is also the case with borings, geotechnical borings, and well destructions. See also Question #13 below regarding the need for a separate application for each drilling category.

13. What if I plan to do “step-out” borings?

“Step-out” borings may be constructed with verbal or written concurrence from the overseeing agency and this Division. A new permit application must be submitted within 7 days of the work, and the additional boring fee will be charged. “Step-out” monitoring wells will require a new permit with the full permit fee paid. Note that LOP site permits are fee-exempt when the work is directed by LOP staff.

14. Can I combine different fee categories, such as borings, geotechnical borings, wells, and well destructions on the same Application for Drilling Permit?

No. A separate application and fee are required for each drilling category.

15. What does Environmental Health require for well drillers to drill in Sonoma County?

A copy of a current workers compensation certificate endorsed to Sonoma County, and a copy of a current C-57 license must be on file with Environmental Health or be submitted with the permit application.

16. How long is a permit valid?

The permit is valid for one year from the date of issuance. However, prior to the permit’s expiration, an extension can be requested.

17. Do I need a new permit if I change drillers?

Yes. A new application and permit alteration fee is required.

18. How is an Environmental Assessment different from other permits?

If the Regional Water Quality Control Board, the City of Santa Rosa, or the Local Oversight Program does not direct the environmental investigation, the proposed work is classified as an Environmental Assessment.

19. Who issues permits for Geotechnical Borings?

Normally the Sonoma County Permit and Resource Management Department (PRMD) issues these permits. If, however, the borings combine an environmental investigation, or are being proposed in an area near known contamination, Environmental Health will issue those permits.

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