ARCHIVED REPORTS_ANNUAL INSPECTION REPORT 3-5-18

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Neighborhood C Great Valley Parkway—Mountain House California Annual Inspection List—Page 3 (Site #101854) Additional Information The Annual Inspection checklist requires that detailed explanation for all `yes' responses to the checklist. Question 5: Has there been any construction or repairs within the area of the Remediation system in the past year? Answer: Yes. Explanation: There has been construction in the area of the remediation system within the last year. However, the construction was not a Regulated Activity as defined by the Operations and Maintenance Plan. The work was limited to shallow irrigation and landscaping that did not disturb soil beneath the orange fabric that marks the upper limit of the Dieldrin internment cell. The Mountain House Developers LLC Construction Manager with knowledge of the internment cell and the Site Operations and Maintenance Plan was onsite to ensure the soil below the orange fabric was not disturbed by the landscape contractor, who was made aware of the internment cell. Question 14: Is there evidence of Excavation? [If excavation was noted in the vicinity of the Remediation System, explain in detail on attached pages the purposes of the excavation, when it was performed, and who at the Department approved the Soil Management Plan.] Answer: Yes. Explanation: As noted above for Question 5, there has been construction, including excavation, in the vicinity of the remediation system in the last year. However, the excavation was not a Regulated Activity as defined by the Operations and Maintenance Plan. All work was limited to shallow irrigation and landscaping installation that did not disturb soil beneath the orange fabric that marks the upper limit of the Dieldrin internment cell. As the Remediation system was not disturbed, and Soil Management Plan for the work was not required. The landscape work was conducted between January and March, 2018.