ARCHIVED REPORTS_2019 SOIL MGMT PLAN (JULY-REVISED)

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Brusca File No. 137-002 BruscaAssociates.com ● P.O. Box 332, Roseville, CA 95661 ● Phone (916) 677-1470 Page 6 March 9, 2018 Murphy Parkway Property Excavation and Materials Management Plan Dust control measures will be implemented during soil waste excavation and stockpiling activities to limit or prevent airborne particles during activities that involve solid waste and soil disturbance. An effective dust control measure is the wetting of exposed materials to limit airborne soil particles. Wetting can be accomplished via liberal sprinkling of exposed materials with a hose, water truck, or other suitable means. The actual methods used for dust control will depend on the nature of the soil disturbance activity, the size of the area disturbed, soil moisture content, and weather conditions. As a general rule, measures will be implemented so that no visible dust is generated during site activities. It is anticipated that removal of the clean cap soils and removal/stockpiling of the underlying waste materials will take place over an approximate three- to four-week time frame. Based on the nature of the wastes, the waste handling procedures described above, information presented in the referenced December 21, 2017 report by AGE, and discussions with the SJCEHD, monitoring or controlling leachate, groundwater, or surface water during the waste excavation and management activities is not considered applicable or necessary. Additionally, landfill gas conditions were previously evaluated at the site, and are not considered applicable to the planned waste removal activities. 6.4 Verification Sampling and Laboratory Testing Following removal of the clean cap soils and underlying solid wastes from the northwesterly portion of the subject parcel as described in Section 6.3, the exposed soils in this area will be sampled and tested to verify that all solid wastes and residuals were removed. The sampling for the full suite of analyses outlined below will be performed in this area on a grid pattern at 100- foot intervals (total of 16 samples); the layout of the planned verification samples is shown on Plate 2. All sampling and sample handling will be performed in accord with standard environmental protocol and will be thoroughly documented. Soil samples will be retrieved in laboratory-provided glass jars and stainless-steel sleeves capped with Teflon tape and plastic end caps. The samples will be immediately placed on ice and transported to a State-certified analytical laboratory under chain-of-custody for analysis. The verification soil samples from beneath the area of removed wastes will be analyzed for the following: • Total Petroleum Hydrocarbons as gasoline, diesel, and motor oil by EPA Method 8015B, with silica gel cleanup • Semi Volatile Organic Compounds (SVOCs) by EPA Method 8270C • Polychlorinated Biphenyls (PCBs) by EPA Method 8082 • Title 22 Metals Total Threshold Limit (TTLC) by EPA Method 6010/200.7; Soluble Thresh Limit (STLC) to be analyzed for any metals with TTLC exceeding 10 times the STLC • Dioxins and Furans by EPA Method E1613/SW8290 In addition to the soil sampling and testing described above, additional verification soil samples will be collected from the waste removal area on a grid pattern at 50-foot intervals (see Plate 2) for analysis for total lead and arsenic by EPA Method 6010.