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a ' 3330 Data Drive ., elta 9992 suite 100 _ JUL'�U� � Rancho Cordova, CA 95670 Enveronmental 916!638 20$5 Consultants,Inc C:NVIRO� iAEN T AL .1 ,E"LTH FAX 9161638-8385 PERMIT/SERVIQF-11 July 15, 1992 Mr Harlin Knoll Public Health Services Environmental Health Division County of San Joaquin 1601 Hazelton Avenue Stockton, California 95201 Subject Well Abandonment Report Beacon Station No 696 2448 West Kettleman Lane, Lodi, California Delta Project No 40-90-839 Dear Mr Knoll i As discussed in recent conversations, Delta Environmental Consultants, Inc , was authorized by Ultramar Inc to abandon six ground water monitoring wells at Beacon Station No 696, located at 2448 West Kettleman Lane, Lodi, California (Figure 1) Abandonment of the wells was necessitated by road construction adjacent to the site In addition to abandonment of monitoring wells MW-9, MW-11, and MW-12, discussed in our work plan dated July b, 1992, and approved by your office under Well Permit Nos 92-2428 and 92-2429, monitoring wells MW-8, MW-21 R, and MW-27, have also been abandoned We understand that Well Permit No 92-2429 will be amended to include the three additional monitoring wells The well locations are shown in the site plan included as Figure 2, which shows the site as it will appear after completion of the road construction Monitoring wells MW-9, MW-11, and MW-12, were abandoned on July 7, 1992 Monitoring wells MW-8, MW-21R, and MW-27, were abandoned on July 13, 1992 All six of the wells were dry Each monitoring well was abandoned by the following procedures • The well casing was backfilled with a 12-sack neat cement grout with 5% bentonite, emplaced from bottom to top by pumping through a tremie pipe • The top of the well casing was sealed, then the well was pressurized in order to drive the grout through the well screen and into the filter pack An air compressor was used to pressurize the well to at least 20 pounds per square inch for 10 to 15 minutes • After removing the cap, the well casing was grouted to approximately 3 feet below grade, as requested by the City of Lodi, Public Works Department . The calculated volume of the wells and filter packs was 0 8 cubic yards (assuming 25% void space in the filter packs) The actual volume of grout used was approximately 1 1 cubic yards, indicating that the well casings and filter packs were adequately grouted Delta Delivers Solutions