Laserfiche WebLink
R604 :UPDATE 22 9-17-1993 <br /> INTRODUCTION <br /> This report includes the results of events occurring at this site <br /> from July 19, through August 30, 1993 . The monthly monitoring <br /> occurred on August 20, 1993 . At that time the carbon was <br /> exchanged on two 85 carbon scrub unit . <br /> LOCATION <br /> Regal Station 604 (parcel # 139-020-08) is located at 1448 N. El <br /> Dorado and Harding Way, Stockton, San Joaquin County, California <br /> The site is in projected section 2; T1N; R6E; MDB&M at <br /> approximately 14 feet above mean sea level Initial drilling <br /> (November, 1989) encountered ground water at approximately 32 <br /> feet below sea level (47' below the surface) and flowing in an <br /> east to southeasterly direction, see figures 1, 2, and 3 . <br /> SITE ACTIVITIES <br /> WEGE personnel visited and/or monitored the site on August 20, <br /> 1993 . At this time the activated carbon in the two effluent 55 <br /> gallon carbon scrub was changed out with the fresh carbon that is <br /> being stored at the site and the monthly vapor samples and <br /> vacuum/depth to water sampling/monitoring occurred. Lawrence <br /> Tank Testing (LTT) has been contracted to visit the site once a <br /> week and remove any condensate that has formed in the vacuum <br /> laterals, carbon scrubs and pumps and to also check for <br /> . breakthrough of the carbon units, via odor. These site visits <br /> were reduced from twice a week starting in June, 1993 , see <br /> Appendix D. This condensate is removed to former Regal Station <br /> 603 and treated with the water treatment system at that site. <br /> LTT has recovered and removed 1 1/4 gallons of condensation water <br /> from June 28, - August 30, 1993 <br /> UPDATE STATUS REPORT #22 <br /> RESULTS - WATER <br /> GROUND WATER GRADIENT <br /> The ground water gradient map, Figure 4B, has been produced from <br /> the August 20, 1993 depth to water measurements . These <br /> measurements show a relatively flat depression has formed at MW5 <br /> with a small ridge trending from MW1 towards MW2, creating flow <br /> towards MW5 and MW4 . Depth to ground water measurements show a <br /> rise in ground water elevation as compared to the previous month, <br /> Figure 4A and Table 2 . <br /> TOTAL PETROLEUM HYDROCARBONS <br /> Floating Product: <br /> No floating product has ever been observed in any of the <br /> monitoring wells or borings at this site <br /> page 1 <br />