ARCHIVED REPORTS_XR0009384 - Laserfiche WebLink

Home Browse Search

©� GROUNDWATER LD07— Ll TECHNOLOGY, INC. 1401 Halyard Drive,Suite 140 West Sacramento,CA 95691,(916)372-4700 FAX(916)372-8781 October 14, 1993 Project No 02070 4607 Mr Brett Hunter Chevron U S A Products Company 2410 Camino Ramon San Ramon, CA 94583-0804 RE QUARTERLY MONITORING AND SAMPLING AND WELL DESTRUCTION ACTIVITIES FORMER CHEVRON STATION NO. 8-6465 5608 NORTH PERSHING AVENUE STOCKTON, CALIFORNIA Dear Mr Hunter Groundwater Technology, inc submits this letter as a summary of well destruction activities performed August 2-5 and September 13-14, 1993, and of quarterly groundwater monitoring and sampling data collected on September 2, 1993 at the above-referenced site MONITORING WELL ABANDONMENT Monitoring wells MW-1, MW-2, MW-2A, MW3, MW-4, MW-5, MW-5A, and MW-6 were abandoned on August 2-5, 1993 Each well was abandoned by drilling out the casing, seal, and filter pack to completion depth using a drill rig equipped with S- and 10-inch holiow stem augers All drilling activities were performed In accordance with Groundwater Technology's Work Plan for Well Abandonment, dated July 29, 1993, under San Joaquin County, Environmental Health Division permit No 93-1483 Soil samples were collected from the bottom of MW-1, MW-2, MW-3, and MW-6 prior to grouting at depths of 33, 38, 33, and 34 feet, respectively The soil samples were analyzed for benzene, toluene, ethylbenzene, and xylenes (BTEX), and total petroleum hydrocarbons-as-gasoline (TPH-G) Analytical results are summarized in Table 1 and copies of the laboratory reports are included in Attachment I The sample collected from the bottom of MW-4 at 48 feet was not analyzed because it contained bentonite Two additional wells, MW-8 and MW-9 were abandoned on September 13-14, 1993 The work was conducted under the existing well destruction permit No 93-1483 that was issued for the first phase Offices throughout the US Canada and Overseas