ARCHIVED REPORTS XR0006993 - Laserfiche WebLink

Home Browse Search

Herman&Helen s Manna Third Quarter 1999 Groundwater Monitoring October 26 1999 Page-7- 4 THIRD QUARTER, 1999, SURFACE WATER MONITORING 4 1 FIELD METHODOLOGY ' On September 23, 1999, a Condor representative was on site to conduct quarterly surface water monitoring activities The monitoring activities included the collec.tlon of surface water samples from the drainage ditch and ' island drainage channel located east and south of the site, respectively (Figure 5, Appendix A) Four surface water samples were collected with a Teflon® dipping cup and transferred to two 40-milliliter glass vials fitted with Tcflon®-lined caps Surface water samples DDS (drainage ditch south) and DDN (drainage ditch north) I were collected approximately five feet and 100 feet north of EightMile Road, respectively Surface water samples IDCW (island drainage channel west) and IDCE (island drainage channel east) were collected from the western terminus of the island drainage channel and approximately 100 feet east of the confluence of the drainage ditch and the island drainage channel, respectively Each sample container was labeled and placed in a ' cooler chilled with ice and delivered under chain-of-custody procedures to GeoAnalytical Laboratories, Inc , in Modesto, California, within 24 hours of sample collection Results of the laboratory analyses are discussed in ' Section 4 3 4 2 LABORATORY ANALYTICAL METHODOLOGY ' The laboratory analytical methods for the surface water samples collected on September 23, 1999, are summarized in Table 4 ' TABLE 4 Laboratory Analytical Methods Analytes BTEX 1PH-G Gasolme Oxygenates/Additives Analytical Methods 602 503OfLUFT 8260 ' Detection Limits 0 3 g11L (BTL) 0 05 mg/L 1 0 �Lg 0 6 L (X) 10 0 ug/L(tert Butanol) ' BTI-X -benzene,toluene ethyl benzene and total xylenes TPH-G total petroleum hydrocarbons,quantified as gasoline Gasoline Oxygenates/Additives=methyl tertiary butyl ether(MT13h) ethanol,tertiary-butanol, di-isopropyl ether(DIPE) Lthyl tertiary-butyl ether(ETRE)and tertiary amyl methyl ether(TAME) 4 3 LABORATORY ANALYTICAL RESULTS TPH-G was not detected at or above the laboratory reported detection limits in any of the surface water samples BTEX constituents were not detected in any of the surface water samples, with the exception of DDN Toluene and total xylenes were detected in surface water sample DDN at concentrations of 0 6 and 0 9 gg/l, respectively MTBE was detected in surface water samples DDN and IDCW at concentrations of 1 7 and 1 6 jag/l, respectively MTBE was not detected at or above the laboratory reported detection limits in surface water samples DDS or ICDE None of the gasoline oxygenates other than MTBE were detected at or above the laboratory reported detection limits in any of the surface water samples A summary of the current and historical laboratory analytical results of the surface water samples is presented in Table 5 on the next page The current laboratory analytical results of the surface water samples are shown in Figure 5, Appendix A 1 ' � CONDOR