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q1%0 '(XaZan & ASSOCIATES , INC <br /> . GEOTECHNICAL ENGINEERING + ENVIRONMENTAL ENGINEERING <br /> CONSTRUCTION TESTING & INSPECTION <br /> March 13, 1998 Project No 034-97252 <br /> UBOC No 97-1031 <br /> Mr Doug Reynolds <br /> H&H Engineering Construction, Inc <br /> 212 Industrial Drive <br /> Stockton, California <br /> RE Groundwater Sampling MAR 17 1998 <br /> Former Underground Storage Tank Area <br /> H&H Engineering Property ENVIRONMENTAL HEALTH <br /> 212 Industrial Drive PERMIUSERVICES <br /> Stockton, California <br /> Dear Mr Reynolds <br /> The following letter report summarizes the findings of our groundwater sampling at the above <br /> referenced site Krazan & Associates, Inc (Krazan) conducted the investigation at the request of Mr <br /> Doug Reynolds in general accordance with Krazan's Proposal/Cost Estimate Number PS98-056, dated <br /> February 25, 1998 <br /> BACKGROUND INFORMATION <br /> We understand that a 1,000-gallon underground storage tank (UST) and related piping were <br /> removed from the subject site in 1987 Krazan advanced six soil borings within the area of the former <br /> UST at the site The results of the subsurface investigation indicate that the former UST was located in <br /> the vicinity of Boring P2, and that relatively low residual concentrations of petroleum hydrocarbons are <br /> present in soils in this area The analytical data establish both horizontal and vertical attenuation of the <br /> contaminants in soils, with the highest concentrations of total petroleum hydrocarbons as gasoline (TPH- <br /> G) and benzene, toluene, ethylbenzene, and xylenes (BTEX) being present in soils from a depth of 10 to <br /> 20 feet in boring P2 The exploratory borings did not encounter groundwater within the maximum depth <br /> 123 Commerce Circle-Sacramento California 95815 -(916)564-2200 - FAX(916)564-2222 <br /> Offices Serving the Western United States <br /> 3497252 GW 1 <br />