Laserfiche WebLink
5 <br /> Brown and Caidw�. <br /> Consultants <br /> 111G� <br /> 723 5 Street <br /> Sacramento <br /> California 95814 7092 <br /> (916)444 0123 <br /> FAX(9161 444 8437 <br /> February 18, 1992 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-6461-04/1 <br /> Subject. Results of Soil Vapor Extraction Pilot Test-- <br /> ARCO Station 2493, Tracy, California <br /> Dear Mr. Carmel: <br /> On December 16, 1991, Brown and Caldwell Consultants (BCC) performed a series of vapor <br /> extraction pilot tests at ARCO Products Company(ARCO)Station 2093 located at 3425 Tracy <br /> Boulevard in Tracy, California. The purpose of these tests was to gather information to <br /> detenn:ne the feasibility of designing and constructing a soil vapor extraction and treatment <br /> system at ARCO Station 2093 This report presents the results of the pilot test indicating (1) <br /> the relationship between volumetric flow rates and extracted well vacuum, and (2) the <br /> concentranons of both gasolene-based hydrocarbons in chlorinated compounds and organic <br /> lead in the exuacted soil vapor This informanon is required to design and specify equipment <br /> used in the soil vapor extraction and treatment system. Additionally, estimates are provided <br /> of the quantity of hydrocarbons m the soil beneath the site, and these protections are made <br /> to approximate cleanup times. <br /> Vapor Extraction Pilot Test <br /> A test plan was submitted to the San Joaquin County Air Pollution Control District <br /> (SJCAPCD) on December 2, 1991 Written approval was granted from SJCAPCD (prior to <br /> the test date) for BCC to perform the pilot test. During the test,soil vapor was extracted from <br /> four monitoring wells at the site using a 5-horsepower air extraction blower. Two 55-gallon <br /> drums containing granulated activated carbon (GAC) were used to filter hydrocarbons The <br /> GAC drums were connected in series to the exit of the vapor extraction piping in order to <br /> prevent hydrocarbon emissions Vapors were extracted from monitoring wells ATR-2,ATR-3, <br /> ATR-4, and ATR-5 Well locations are shown on Figure 1 Wells ATR-3, ATR-4, and <br /> ATR-5 were chosen for the test because of their proximity to the underground storage tanks <br /> and the area of known soil contamination. Well ATR-2 was selected because it is located in <br /> the upgradient portion of the plume, and soil contamination is known to exist in the capillary <br /> zone at this well. <br /> 6161\C0RRFSPb461-"Ertl <br />