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• (Page 2) <br />MINE ID # OR PROSPECTING ID # M-77-208 <br />INSPECTION DATE MZ INSPECTOR'S INITIALS AJW <br />OBSERVATIONS <br />This was a normal monitoring inspection conducted as a follow-up to a petroleum release that <br />occurred in May of 1996. The release occurred as a result of faulty transmission lines from <br />the storage tanks to the fueling station. The lines had apparently corroded and began to <br />leak. Ironically, the operator was in the process of upgrading the fuel storage area with <br />a new concrete containment structure and new tanks when the leak was discovered. <br />The operator did follow proper notification procedures and through contact with various <br />agencies did respond rapidly to identify the extent of the contamination plume and develop <br />remediation procedures. Fortunately, the leak was discovered before the fuel had migrated <br />very far and the remediation plan is restricted to a fairly small area of approximately 6000 <br />square feet. Borehole testing that was completed during the initial site assessment did <br />did indicate the presence of petroleum hydrocarbons, however, none of the samples exceeded <br />the State MCL's (Drinking Water Maximum Contaminant Level). <br />The operator has installed a dual phase extraction system to remove all contaminants from the <br />affected area. This system is a series of shallow wells that are pumped into a "knock-out" <br />tank where the contaminants are separated from the rest of the water. The water is then <br />pumped into a 20,000 gallon holding tank for use in watering the roads and the recovered <br />product is stored in SS gallon drums for off-site disposal or recycle. <br />Based on this inspection, it appears that the operator has addressed this situation in a very <br />professional and expedient manner by immediately identifying the extent of the spill and <br />installing remediation measures to facilitate the clean-up process. In addition, new <br />containment and control facilities have been installed to better monitor the dispensing of <br />fuel in the future. <br />I ~ E Contact Address <br />cc: Carl Mount <br />Steve Mossberg-Southwest <br />Steve Laudeman-CDPHE <br />Portland <br />NAME John Lohr <br />OPERATOR Southwest Portland Cement <br />STREET P.O. Box 529 <br />CZTY/STATE/ZIP Lvons. Colorado 80540 <br />~ CE <br />~ BL <br />~ FS <br />~ HW <br />~ HMWMD (CH) <br />~ SE <br />~ WQCD (CH) <br />~ OTHER <br />