Laserfiche WebLink
THE <br />WININI?w <br />L A B OR AT OR I E S. INC. <br />ANALYTICAL CHEMISTRY • ENVIRONMENTAL SERVICES <br />GEOTECHNICAL ENGINEERING • DRILLING SERVICES <br />CONSTRUCTION INSPECTION & MATERIALS TESTING <br />November 2, 1994 <br />Mr. John Fukumoto <br />City of Stockton — Public Works Dept. <br />425 North El Dorado Street <br />Stockton, California 95202 <br />TL 394-0027-05 <br />Re: Fourth Quarter Soil Gas Monitoring Results For the Austin Road Landfill, Stockton, California. <br />Dear Mr. Fukumoto: <br />This letter summarizes the results for fourth quarter soil gas monitoring at the Austin Road Landfill. The work <br />outlined herein was performed by The Twining Laboratories, Inc. (Twining) in accordance with the scope of work <br />presented in Twining's proposal dated August 30, 1994 (Twining, 1994). This work was performed under City of <br />Stockton Purchase Order 065017 dated September 20, 1994. Field activities were conducted during October of <br />1994. <br />1.0 PURPOSE AND SCOPE <br />The purpose of this project was to measure methane gas concentrations in accordance with Subtitle D of the <br />Resource Conservation and Recovery Act (RCRA). The City of Stockton also requested that Twining measure <br />methane gas concentrations in site structures owned by the city. <br />The following scope of work was conducted to achieve the stated purpose: <br />Methane gas concentrations were measured using a Gastechtor model No. 1314; and <br />o This letter was prepared documenting field activities and contains a site location map, and site plan <br />showing probe locations. <br />Field activities are summarized in the following subsections. <br />2.1 Soil Gas Monitoring. Soil gas concentrations were measured using a Gastechtor Model No. 1314SWN <br />calibrated for methane. Each gas probe was purged for five minutes. After the five minute purge time, oxygen and <br />lower explosive limit (LEL) percentages were recorded., Methane gas concentrations measured in site structures <br />were recorded when the readings stabilized. Methane gas monitoring results are presented in Table 1. <br />CORPORATE OFFICE: MODESTO VISALIA <br />2527 Fresno Street 4230 Kiernan Ave. Suite 105 2521 E. Valley Oaks Drive <br />Fresno, CA 93721 Modesto, CA 95356 Visalia, CA 93292 <br />(209) 268.7021. Fax 268-7126 (209) 545-1050 (209) 625-1712 <br />Chemistry Fax 268-0740 Fax 545-1147 Fax 625.1714 <br />BAKERSFIELD <br />3701 Pegasus Drive, Suite 124 <br />Bakersfield, CA 93308 <br />(805) 393.5088 <br />Fax 393.4643 <br />