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r <br /> ' = 4 <br /> f � <br /> BROWN AND _ Jf«//�� }�e— , , HfAA, TH <br /> �� o 1 � � � iI�IM�- 1 <br /> 9'3 110V I ' PH 2 32 <br /> November 8, 1993 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-7403-0111 <br /> Subject Third Quarter 1993 Report for ARCO Station 2093, <br /> 3425 Tracy Boulevard, Tracy, California: <br /> Pilot Program Site 1416 <br /> Dear Mr Carmel <br /> This report presents water level measurements and results of groundwater sampling performed <br /> during the third quarter of 1993 at ARCO Products Company (ARCO) Station 2093, located <br /> at 3425 Tracy Boulevard in Tracy, California Fieldwork was performed by Emcon <br /> . Associates on August 30 and 31, 1993 This report was prepared under Task Order <br /> 2093-93-5 There are seven on-site groundwater monitoring wells (ATR-1 through ATR-7) <br /> and live off-site monitoring wells (ATR-8 through ATR-12), as shown on Figure 1 Five of <br /> the on-site wells and all of the off-site wells were sampled Well ATR-3 was not sampled <br /> because it contained floating product, and well ATR-6 was not sampled because it was not <br /> accessible due to on-site construction activities <br /> Field and Analytical Methods <br /> Emcon Associates personnel measured depth-to-water and product thickness (if present), <br /> purged each well to be sampled, and collected groundwater samples at the site Depth-to- <br /> water measurements and a check for floating product were made prior to commenc>Ing <br /> purging <br /> Prior to sampling, the wells were purged of a minimum of three well volumes or until <br /> evacuated using a centrifugal pump or bailer After purging, each well was sampled using <br /> a Teflon bailer that was steam-cleaned between uses All groundwater samples were analyzed <br /> for total petroleum hydrocarbons as gasoline (TPH-G), and for benzene, toluene, ethylbenzene, <br /> This report was prepared to accordance with the standards of the environmental conviltuig industry at the tune it was <br /> prepared It should not be relied upon by parties other than those for whont it was prepared and then only to the <br /> extent of the scope of►voile which was aiitliorized 71us report doea not gnarawee that any additional environmental <br /> caulrrionc beyond that described in this report eta! at this Site <br /> 74031ftEP0KTSIAUG93QTR KF'T <br /> Enwonmental Engineering And Consulting Analytical Services <br /> 9616 \1[CRovA%E%uE P 0 Bok 13449 S1CRI%IE`TO CA 95813 3449 �y <br /> (916) 444 0123 FAt (916) 856 )277 �'` ` <br />