Laserfiche WebLink
R604 :UPDATE 25 12-29-1993 <br /> INTRODUCTION <br /> This report includes the results of events occurring at this site <br /> from November 4 through 30, 1993 . <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 November 4 , <br /> and 30, 1993 . During the November 30, 1993 visit monthly depth <br /> to water, vacuum influence and air sampling occurred. The vapor <br /> extraction system, which is pulsing, was an the ON status during <br /> this visit, see Table 3 and Appendix A. <br /> UPDATE STATUS REPORT ##25 <br /> RESULTS - WATER <br /> GROUND WATER GRADIENT <br /> The ground water gradient maps have been produced from <br /> measurements obtained on October 27, 1993 , and November 30 , 1993 <br /> see Figures 4A and 4B <br /> Figure 4A, October 27, 1993 depth to water measurements obtained <br /> when the vacuum system was on, show a flat ridge from MW3 towards <br /> MWS, with flow towards MW7, MW2 and MW4, <br /> Figure 4B, November 30, 1993 depth to water measurements were <br /> also obtained when the vacuum system was on This figure shows a <br /> shift an flow direction, with flow from MW7 towards MW1 and MW2 <br /> These most recent measurements indicate ground water elevation <br /> rising and a recharge to the area, see Table 2 <br /> TOTAL PETROLEUM HYDROCARBONS <br /> Floating Product No floating product has ever been observed in <br /> any of the monitoring wells or borings at this site . <br /> Dissolved Petroleum Hydrocarbons in Ground Water (EPA method 5030 <br /> TFH as gasoline) : <br /> As of September 15, 1993 , dissolved total fuel hydrocarbons, <br /> gasoline range (TFHg) are present in MW5, aeYMW2` which contained <br /> 0 . 86 and 0 26 parts per million (mg/L) respectively. All other <br /> wells sampled, MW1, MW3 , MW4, MW6 and MW7 were below detection <br /> limits . MW5 has tested below 1 ppm for gasoline range <br /> hydrocarbons since the June 24, 1991 . The laboratory reported <br /> page 1 <br />