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<br /> TIWC <br />1.0 Introduction <br />Tanks and lines at the City of San Marcos's fuel depot at the <br />maintenance yard at Hopkins Street were found to have two lines that <br />were leaking. The testing was performed by Tank Check Environmental <br />Services. The suction line (line 3) providing regular gas was found to <br />be leaking in two (2) spots; one at the joint underneath the dispenser <br />and another at the joint over the tank. The suction line (line 4) <br />providing unleaded gasoline was found to have 3 leaks; one near the <br />dispenser island, another near the tank, and the other halfway between <br />the dispenser and tank. The soil underneath the lines was excavated, <br />sampled and tested. Soil and backfill contamination was found, the <br />water in the backfill of tank 1 was found to be contaminated. Drilling <br />was performed to determine the extent of contamination. This report <br />documents the findings to date and recommends additional drilling and <br />studies to quantify the extent of contamination and to remediate the <br />contamination. This report has been prepared as an interim <br />documentation of the findings and conclusions to inform the City of San <br />Marcos and the TWC of the current status of the site investigations. A <br />thorough documentation will be prepared at a later date when the <br />investigations are complete. <br />2.0 SITE LOCATION <br />The site is the fuel depot for the City of San Marcos. It is located at <br />630 E. Hopkins" San Marcos, Texas 78666. The City of San Marcos is <br />located in Hays County between Austin and San Antonio. The location of <br />the site is two blocks west of 1-35 on Hopkins Street across from <br />an HEB store. It is approximately 2000 feet east of the Edwards <br />Aquifer transition zone and approximately 3000 feet east of the San <br />Marcos River. The location of the tank farm and some of the details of <br />the site are shown in the Site Plot, Figure 1. <br />3.0 SUBSURFACE RELEASE OF GASOLINE <br />The source of the gasoline release is the suction lines serving the <br />regular and unleaded dispensers. The quantity of gasoline release is <br />unknown. There was not any significant free product found in the <br />backfill of the tanks. Signicant levels of soil vapor gasoline and <br />dissolved gasoline in the groundwater were found. <br />4.0 DISPOSITION OF TAt1!'.8., PRODUCTS, WASTES, SOIL <br />The gasoline remaining in the tanks has been removed by the Tolson oil <br />Distributor. The lines have been removed and remain on site. <br />"~U.ogan Road . .GtIorDftown.Teøt78828 . (512)268-2259 . (612)255-9924 <br />