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Limited Site Assessment Work Plan SOUSER PROPERTY 10217 North Highway 99, Stockton, California 1.0. INTRODUCTION In accordance with the request of Ms. Sharon Souser,Advanced GeoEnvironmental,Inc.(AGE)has prepared this Limited Site Assessment Work Plan for the property located at 10217 North Highway 99, Stockton, California. The location of the site is illustrated on Figure 1. A plan of the site is illustrated on Figure 2. This work plan was prepared as required for the procurement of a soil boring permit and to satisfy requirements of the Underground Injection Control Programs (UIC) as administered by the San Joaquin County Environmental Health Department (SJCEHD). The requirements of the UIC program were outlined in the SJCEHD letter dated 25 January 2005. 2.0. BACKGROUND The subject property, located at 10217 North Highway 99 Frontage Road, Stockton, California outside the city limits of Stockton, California, is situated in an area of residential use. The subject property is a rental unit that is currently in operation. (Figure 1). The SJCEHD identified the site as a clandestine drug laboratory where hazardous materials were possibly disposed into the septic system. On 20 December 2004, a sample of the contents of the septic tank was analyzed. The analytical results reported detections of hazardous materials and or wastes in the septic tank.TRPH,acetone,1,4-dichlorobenzene,p-isopropyltoluene and toluene were detected above laboratory reporting limits. SJCEHD has requested that further investigation of the septic system be performed to evaluate if there is a threat to drinking water.The septic system construction is made up of a 2,000 gallon septic tank, 8-inch tight line to a five outlet distribution box,four separate 8-inch tight lines emptying into four separate 5-foot by 25-foot seepage pits. 3.0. SCOPE OF WORK The scope of work includes the treatment and proper disposal of contaminated septic waste, septic tank cleaning for inspection,advancement of six soil borings for the collection and analysis of soil samples,and sampling of the on-site domestic well.Upon completion a report will be prepared and reviewed by a California Registered Geologist.The scope of work will include the following tasks: • Septic tank contents treatment and disposal; Advanced GeoEnvironmental,Inc.