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that has completed the 40-hour OSHA safety-training course and will <br /> provide OSHA training certification of the job Foreman working at the site <br /> upon request. <br /> 3.2 SITE CONDITIONS <br /> The installation of the new monitoring well does not include excavation of <br /> refuse or contact with refuse. <br /> Potential risk with Landfill Gas may be an issue but minimal as the new <br /> GW wells are outside the refuse footprint. NCSL's perimeter LFG <br /> migration monitoring wells have shown methane readings of less than one <br /> percent by volume. The lower explosive limit of methane is five percent by <br /> volume. Potential hazards of methane gas are fire, explosion and <br /> asphyxiation. <br /> 3.3 SAFETY PROCEDURES <br /> A. Drilling Contractor will conduct a safety meeting with County staff and <br /> Contractor's employees before the start of the project. During the first <br /> safety meeting, Drilling Contractor will inform employees not to touch <br /> refuse if encountered. Employees will wear personal protective equipment <br /> when working. <br /> B. If any strange material is encountered during drilling, then the work area <br /> will be cordoned off and the County's Office of Emergency Services (OES) <br /> will be notified. The affected work area will be flagged and excluded from <br /> other work areas until the strange material is characterized by OES. <br /> County's staff and Drilling Contractor will not attempt to remove or handle <br /> suspicious material. <br /> C. Drilling Contractor is required to follow OSHA safety rules and regulations <br /> during this project. Hard hats, safety glasses and safety vests will be <br /> required for personnel working near the construction area and operating <br /> heavy equipment. <br /> D. A Landfill Gas analyzer will be used to measure methane concentrations <br /> in the work area. Drilling Contractor will be required to obtain the Landfill <br /> Gas analyzer and ensure the meter is in good working order throughout <br /> the project. Workers will not perform work that involves sources of <br /> combustion (such as welding equipment) or other work that generates <br /> temperatures that could ignite methane unless the work area has been <br /> verified to meet safety requirements. <br /> N:\1 North County\Projects\2026-Monitoring Well Project\UPCAA Version\15 and 16\2026-NC-GW Well G15 G16-Specs- <br /> Final.docx <br /> G15&G16 Page 4 of 4 San Joaquin County <br /> NC-2026 Monitoring Wells Public Works/Solid Waste <br />