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destroyed was used for discharge of treated water under an RWQCB Waste Discharge Requirements (WDR) permit. We also became aware that there were very recent investigations/trenching to confirm the extent of the glass landfill in the northwestern portion of the property, collection of shallow soil samples previously and recently from the area near the wells to be destroyed to assess soil quality, and at least one soil sample collected from beneath an area where glass was present in the northwestern portion of the property. Advanced Geo Environmental (AGE) has provided us with investigation results (see Former PNA Trench Results PDF attachment). Based on the data we have been provided the recent investigation did not encounter glass or debris indicative of contamination in the vicinity of the wells and the extent of the glass landfill has been confirmed and is located over 400 feet from the nearest well to be destroyed. A attached map shows trench results showing 0 inches of glass in trenches across most of the property. This data supports previous investigations and boring data previously obtained and reported by Raney Geotechnical Inc. and AGE (provided to the County by Arcadis via email dated October 31, 2017, hard copies also sent). Soil data collected for the site is attached (PNA SWIS Metals and Sample Detections, PNA Soil Investigation Soil DI). Results for soil sample locations AB-14, AB-13, located near EW-04 (Page 1 of the PNA SWIS Metal... PDF attachment), do not show elevated levels of metals. Based on our review the data set suggests there are no significant soil impacts in the area outside of the glass landfill area in the northwest. We understand there is some pending analytical data. We will provide that once it is received which is anticipated to be next week. In the October 31, 2017 email, Arcadis also included a map prepared by Brusca Associates for surface soil samples collected across the property (attached here for ease of reference; page 2 provides a data table). The results show only low concentrations of total petroleum hydrocarbons (diesel, motor oil) and PCBs present at the surface. Where deeper (2 ft) soil samples were collected, results did not indicate soil impacts. These low concentrations of relatively immobile contaminants at the surface do not appear to represent a potential vertical migration threat to groundwater. The attached maps and additional data has previously been provided to the County albeit a separate department. County inspectors were onsite during the investigation. We would like to proceed with well destruction using the pressure grout method. The property owner is under a tight development schedule. It is understandable that the well destruction permit process has been delayed while data is received and assessed, but it is very important that we proceed with well destruction. Please let us know if you need additional information or if a call with the Director is appropriate. If at all possible we need a decision from the County regarding the well destruction method by December 15, 2017. Thank you. Jenifer Jenifer J. Beatty PG, CHG I Program Manager, Vice President I Jenifer.Beattvarcadis.com Arcadis 101 Creekside Ridge Court, Suite 200 Roseville CA I 95678 I USA T. +1 916 786 7971 I M. + 1 916 747 7971 Professional Geologist / PG-CA, #6650, Certified Hydrogeologist/ CHG-CA # 569 Connect with us! www.arcadis.com I Linkedln I Twitter I Facebook ARCADIS Be green, leave it on the screen. 2