Laserfiche WebLink
ff <br /> 140 Gold Camp Drive, Suite 160 <br /> . ancho Cordova, CA 95670 <br /> 916) 853-9293 - FAX (916) 853-9297 <br /> October 6, 1999 BSK No. 07-4-00183 <br /> Mr. Joseph A. Aldridge,RG <br /> Senior Project Manager <br /> Ultramar; Inc. <br /> 525 West Third Street <br /> Hanford, CA 93230 <br /> Subject: Monitoring Well MW-4 Sampling Results <br /> Beacon Station No. 492 <br /> 470 North Main Street <br /> Manteca, California <br /> Dear Mr. Aldridge: <br /> BSK&Associates (BSK)is pleased to present this letter summarizing the analytical results of a <br /> groundwater sample obtained from monitoring well MW-4 at Beacon Station No. 492 in <br /> Manteca, California(the Site). The work was conducted in accordance with a letter request from <br /> the San Joaquin County Public Health Services, Environmental Health Division(PHS/EHD), <br /> dated July 8, 1999. A site plan showing the monitoring well location is attached(Figure 1). <br /> Field activities and analytical results are summarized below. <br /> Field Activities <br /> BSK purged and sampled monitoring well MW-4 on August 27, 1999. The monitoring well was <br /> purged of a minimum of three well-volumes using a submersible electric pump. Water <br /> temperature, conductivity, and pH parameters were measured after removal of each approximate <br /> well volume. A water sample log is attached. Equipment used during purging and sampling <br /> activities was cleaned with non-phosphate detergent wash and rinsed prior to use. <br /> Subsequent to purging, a water sample was collected from the well using a clean disposable <br /> bailer. The sample was labeled,placed in an ice chest cooled with "blue ice", and submitted to <br /> Kiff Analytical LLC in Davis, California, for chemical analysis of total petroleum hydrocarbons <br /> as gasoline (TPHg),benzene, toluene, ethylbenzene, xylenes, and methyl tertiary-butyl ether <br /> (MTBE) by EPA Method 8260B. <br /> Purge water, cleaning water, and rinse water was stored on-site in a sealed and labeled DOT- <br /> approved 55-gallon drum. <br /> Analytical Results <br /> The following table presents a summary of analytical results of the groundwater sample obtained <br /> from monitoring well MW-4. <br /> Geotechnical Engineering - Engineering Geology - Environmental Services - Construction Inspection &Testing - Analytical Testing <br />