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The pH levels in the soil samples were 5.9 and 5.5 and the pH of the septic <br /> tank water was 6.2. <br /> V. CONCLUSION <br /> PSA SAMPLING <br /> Residual methamphetamine and elevated levels of chloride were identified within wipe <br /> samples taken from all surfaces sampled in the unit. The contamination was greatest on <br /> surfaces in the vicinity of the kitchen, in the central hallway next to the living room and <br /> on the heating unit in the laundry/utility room. The presence of these chemicals may <br /> pose a health risk to building occupants, thus remediation work should be completed at <br /> the property prior to re-occupancy. <br /> RECOMMENDATIONS <br /> The following site remediation is recommended based on visual observations and <br /> sampling data obtained at the site. These recommendations are intended to be used as a <br /> general guideline of remediation procedures only, and cannot be solely relied upon by the <br /> Remediation Contractor ("Contractor"). These recommendations should be used in <br /> addition to specific agreements with BFC Properties, the San Joaquin County <br /> Environmental Health Department and Code Enforcement requirements, the standard <br /> operating procedures established by the Contractor and the Contractor's expertise in the <br /> area of clandestine drug laboratory remediation. Implementation of these <br /> recommendations does not guarantee nor warrant that the structure will be free of <br /> residual contamination from methamphetamine production. <br /> Due to the nature of the chemical hazards and handling requirements associated with this <br /> remediation, the work should be performed by a licensed contractor holding a Hazardous <br /> Substances Removal Certification. The remediation contractor should contact the San <br /> Joaquin County Environmental Health Department prior to the start of any remediation <br /> work to ensure the work is completed in accordance with San Joaquin County <br /> requirements. <br /> ♦ Porous building materials are often not able to be adequately cleaned of residual <br /> contamination from methamphetamine production and typically require removal <br /> BFC Properties 11 NETWORK ENVIRONMENTAL SYSTEMS,INC. <br /> Preliminary Site Assessment NES Project Number 04-261 <br /> 26237 Miller Avenue, Escalon, California <br />