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0 0 <br />SITE DESCRIPTION <br />MW facility currently houses a tire, battery, accessory and auto <br />maintenance (TBA). The site consists of a showroom, a warehousing <br />operation, a parts supply and retail sales operation, an auto (mechanical) <br />maintenance facility and a tire, battery and accessories sale and <br />installation operation. There are physical signs in the front of the TBA <br />(facing Pacific Avenue) that fuel dispensing islands were once located <br />there. <br />DISCUSSION <br />MW reports that two 10,000 gallon underground storage tanks were removed <br />from the property by Seibold Corporation on June 26, 1986. The underground <br />storage tanks were carbon steel single wall vessels. A permit for the <br />removal was issued by the San Joaquin Local Health District. MW believed <br />that no contamination was discovered in or around the excavation. Several <br />months after the tank removal, stockpiled soil was returned to the <br />excavation and compacted. The excavation was then covered by blacktop. <br />SERVICES PERFORMED <br />The following describes the scope of services deemed appropriate to <br />determine the presence, or lack of presence, of petroleum hydrocarbons in <br />the area from which underground tanks have been removed. <br />INVESTIGATORY SOIL BORINGS AND MONITORING WELLS <br />Based upon the information obtained regarding the location of the two MW <br />removed tanks, ADS proceeded to install 5 soil borings and gather samples. <br />The location of the borings was chosen after conversations with MW, TBA <br />personnel and MW engineering staff. Analysis of the samples gathered from <br />Soil Boring 5 should provide information as to site background conditions <br />to compare with analytical data from Soil Borings 1, 2, 3 and 4. Soil <br />borings 1, 2, 3 and 4 were installed to ascertain the amount of <br />contaminations, if any, in or around the area from which tanks were <br />removed. Soil samples were gathered every 5 feet and field screened for <br />petroleum hydrocarbons, utilizing a Sensidyne-Gastex Detector and <br />appropriate gasoline detection tubes to determine which samples could be <br />composited and which were to be maintained as discrete samples. A <br />description of the field screening process may be found in Exhibit 1. <br />