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' 08 September 1999 <br /> .i <br /> AGF.-NC Project No 95-0103 <br /> Page 3 of 9 <br />' containing 0 5 ml of hydrochloric acid (18%) as a sample preservative and into one l-liter amber <br /> bottles <br />' The labeled vials collected from hydro-punch CB3 and CHP1 through CHP5 were placed in a chilled <br /> container under Ice and delivered under chain-of-custody to OnSite for analysis Samples from <br />' hydro-punch samples CB6 and C137 were placed in a chilled container under ice and transported <br /> under chain-of-custody to Onsite for analysis While hydro-punch samples CB5C, CB8 and CB9 <br /> were placed in a chilled container under ice and transported under chain-of-custody to McCampbell <br />' Analytical, Inc (MAI) a state-certified laboratory In Pacheco, California for chemical laboratory <br /> analyses <br />' 24 LABORATORY ANALYSIS OF SOIL AND GROUND WATER SAMPLES <br /> ' SeIected soil and ground water samples were analyzed for <br /> Total petroleum hydrocarbons quantified as gasoline (TPH-g), <br /> • - Volatile aromatic hydrocarbons (benzene, toluene ethyl benzene and total Xylene BTEX) <br /> and methyl butyl ether (MTBE) and <br /> ' - Oxygenated fuel additives methyl butyl ether (MTBE), tertiary butyl alcohol (TBA), di- <br /> isopropyl ether (DIPS), ethyl tertiary butyl ether (ETBE) and tertiary amyl methyl ether <br /> (TAME) ' <br /> Sample analysts conducted by OnSite was in accordance with EPA methods 8260 Modified Three <br /> ground water samples were analyzed by MAI in accordance with EPA Method 8015 Modified, EPA <br /> ' Method 8020 and EPA Method 8260 Modified <br /> ' 2 5 MONITORING WELL PURGE PROCEDURES <br /> On 30 June 1999, a Solinst water level meter was used to measure the depth to ground water in <br /> monitoring wells MW-1 through MW-6, and Napor wells VE-6 and VE-7, relative to the tops of the <br /> well casings (Table 1) <br /> After recording the depth to ground water measurements monitoring wells MW-1, MW-3 through <br /> MW-5 and vapor well VE-1 «ere purged using a two-stage purge pump A mimmum of three well- <br /> volumes of water was removed from near the top of the water in each well Temperature pH and <br /> • conductivity of purged ground water were measured at one-,three-or at seven-gallon intervals using <br /> an ICM model 52200 water analyzer Dissolved oxygen concentrations in ground water were <br /> ' measured using a YSI-55 dissolved oxygen meter <br /> Adi arced GcoLnN ironmenlal,Inc <br /> 1 <br />