Amendment_1.doc

1. On drawing sheet 3 of 3 sample location TCP-60 it shows sampling for Dissolved Metals and TPHG. This is a typo and should be deleted. Follow Section 2 Paragraph 2.2. starting on Page 15 - 17 for the correct sampling descriptions for each point.

2. On page 13, delete Site conceptual model; add site drawing to show the sampling points (similar to sheet 1 of 3).

3. Purged water can be disposed of at the waste water treatment plant.

4. Excess dirt can be spread around the sampling point.

5. There is no letter from Mr. Jim Tischler of the NCRWQCB, only an e-mail that ask the CG to conduct further GW testing this time for dissolved metals to compare to their data base for this region.

6. Additional references that may be useful are:

A. State of California Environmental Protection Agency, Guidance Manual for Groundwater Investigations, "Monitoring Well Design for Hydro geologic Characterization".

B. State of California Department of Water Resources, Guidance Manual for Monitoring Well Standards (Bulletin 74-90), Part III Destruction of Monitoring Wells, Sections 16 – 19 and 23.

http://www.water.ca.gov/groundwater/well_info_and_other/california_well_standards/well_standards_content.html

C. Sonoma County Department of Health Services, Environmental Health Division guidance for, Environmental Drilling Program.

http://www.sonoma-county.org/health/services/environmentaldrilling.asp http://www.sonoma-county.org/health/services/environmentaldrillingfaq.asp