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GROUND ZERO ANALYSIS, INC. 1714 Main Street �� i Escalon, California 95320-1927 D Telephone: (209)838-9888 - Facsimile: (209) 838-9883 f ro v i 200z April 30, 2002 ,. 9'ER}al HEALTH VICES Ei Mr. Michael Infurna San Joaquin County Environmental Health Department 304 E. Weber Ave., Third Floor Stockton, CA 95202 Subject: Contamination Assessment.Report Kooyman Property, 6781-6787 E. Jahant Road, Acampo, CA Dear Mr. hduma: We are writing on behalf of the current property owner, Mr. Mike Kooyman, to present you with the results of the recent contamination assessment conducted at the subject property. The primary purpose of the work was to determine whether or not soil contamination existed as a consequence of previous drug lab operations on the property. The work was also designed to characterize contaminated waste from the septic system as hazardous or non-hazardous and to evaluate options for cost-effectively disposing of the material. E Soil samples collected beneath the septic system leach lines did not contain any detectable contaminants. Analysis of the contents of the.septic tank and drummed waste previously pumped from the tank indicates that the material does not have the characteristics of a hazardous waste. r I Background The previous owner of the property identified as 6781 - 6787 E. Jahant Road was issued a Notice and Order to Abate Housing and Dangerous Building Violations by the San Joaquin County Public Health Services, Environmental Health Division (EHD) on October 31, 2001. The order resulted from the discovery of suspected methamphetamine-manufacturing operations in a mobile home on the property (6781 E. Jahant Rd.). The location of the property is shown on Figure 1. f� The previous owner retained Environmental Science Services, Inc. (ESSI) to conduct an inspection of the property and to collect samples to'determine if contamination had resulted from the lab operations. ESSI inspected the property and collected samples from inside the mobile home and from inside a septic tank serving the mobile home. Samples of reddish-brown stains inside the mobile home were analyzed for phosphorus and iodide while the sample collected from the septic tank was analyzed for volatile organic compounds (VOCs) by EPA Method 8260 with open scan. The results of ESSI's work were reported in a letter to the previous owner dated December 19, 2001. The only analyte