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28 December 2018 AGE Project No. 18-4574 Page 8 of 12 AdvancedGeo Environmental KNI It will be presumed that all hard surfaces in contaminated areas will have to be cleaned (or demolished) and soft items (personal property, furniture, etc.) will have to be disposed. The Preliminary Site Assessment Report will detail remedial activities, as necessary. 3.3.7. WASTE DISPOSAL AREAS Based on AGE representative's visual assessment, the guest hallway bathroom was most likely used for waste disposal. These surfaces will likely be cleaned regardless of sampling results. 3.3.8. SOIL STAINED AREAS Based on AGE representative's visual assessment, no specific areas on the property were easily identified as stained locations. No staining of soil, dead or dying landscaping was identified around the perimeter of the property nor in the backyard or small side yard areas. 3.3.9. DRAINAGE AREAS Based on AGE representative's visual assessment, no specific areas on the property were easily identified as drainage areas. Additionally, AGE found no record of an on-site septic tank at the residence. The residence appears to be connected to the city's municipal sewer system. 3.4. JUSTIFICATION FOR PROPOSED SAMPLING AREAS The sampling areas proposed are the most likely to have been used for equipment setup or have the highest potential for residue contamination from cooking/conversion, personal use or person to object transfer, based upon AGE's inspection of the facility and Agents reports. 3.5. DESCRIPTION AND JUSTIFICATION FOR AREAS NOT SAMPLED No areas of the residence have been excluded from sampling. 4.0. SAMPLING AND PROTOCOLS At present, "acceptable" limits for residual methamphetamine concentrations have not been established by the Occupational Safety and Health Administration, the Environmental Protection Agency, the California Department of Health Services, the