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Phase H Site Assessment Report Royal Furniture (El Dorado at Lindsay) 342 & 348 North El Dorado Street, Stockton, California 1.0. INTRODUCTION At the request of Mr. Hai Li,Advanced GeoEnvironmental, Inc. (AGE)has prepared the enclosed Phase II Site Assessment Report for the property at 342 & 348 North El Dorado Street, Stockton, California(the site).The location of the site and its surroundings are illustrated on Figure 1; major features on the site and soil probe boring locations are illustrated on Figure 2. This work was performed as part of due diligence by Mr. Li to investigate areas of potential environmental concern at the site, and was performed in accordance with guidelines issued by the Central Valley Regional Water Quality Control Board (CVRWQCB) for the investigation of underground storage tank (UST) sites Based on data from ground water monitoring wells in the area, ground water was inferred to be at a depth of approximately 20 feet below surface grade(bsg) and flows towards the northeast. 2.0. BACKGROUND In the course of a Phase I investigation by AGE, a three-chamber oil/water separator containing sludge was discovered in the southeast portion of the site.The sludge was suspected to be impacted by petroleum hydrocarbon contaminants from an auto repair shop previously located on the property. The sludge was pumped out and properly disposed, and the separator was cleaned with a pressure washer.After cleaning the separator, one exploratory boring was made immediately adjacent to the northwest side of the separator and soil samples were collected from depths of 6 and 8 feet below surface grade(bsg).Analytical results of the soil samples detected moderate concentrations of TPH as diesel, motor oil and gasoline were detected in the sample from 6-foot depth (Table 1); much lower concentrations of TPH as diesel, motor oil and gasoline and toluene were detected in the sample from 8 feet bsg. In addition, three analytes were detected above laboratory reporting limits for volatile organic carbons(sec-butyl benzene, 150 µg/mg,n-propel benzene,71 µg/mg and 1,2,4- trimethylbenzene, 410 gg/mg) in the sample from 6-feet bsg; volatile organic carbons were not analyzed in the sample from 8 feet bsg(Table 1).Based on the analytical results of the soil samples, AGE recommended removing the separator and over-excavating the separator site. Separator cleanup,soil sampling and analytical procedures,findings,conclusions and recommendations were presented in the AGE-prepared Preliminary Site Assessment Phase II Status, dated 30 November 2001. Advanced GeoEnvironmental,Inc.