FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

\■d \� Christopher M. Palmer, PG, CEO,HG, Consulting Hydrogeologist 1345 Kimberly Drive San Jose,CA 95118 ph.4081267-5238;fax 4081267-7396 CMPRGCE(M4G0aol.com Wright Environmental Services, Inc. last sampled the wells in August 2009 (See References). No petroleum hydrocarbon constituents were detected in groundwater collected during the final santpting event. The EHD states two options for well desirWton procedures: • Option 1. Wells that have laborMM data from the last sampling event that demonstrate presence of arty contaminants of concern are to be destroyed by removing &I ft aoMnts of the original borehole (well casing, screen, filter pact wW got# sealant). The cleared borehole is then to be sealed with nest oammW My grouting from the bottom to top up to a depth of three feet bellow graft. All groundwater displaced to the surface during grout instal 0l n WW be pumped out of the excavation and containerized for proper dk or! Any wells located offsite require updated access agreena0w wwroachment permits to be submitted along with the EHD Well Ova0 P*rmit Application • Option 2. Wells that have fruMft,i Meta from the last sampling event that report non-detectable vueaa■arwirr[ of contaminants of concern, with acceptable laboratory da embev omak may be destroyed by pressure grouting with neat cernam, do~ 'gym the bottom up via tremie pipe, while leaving the casing lr x1aa "*~ing that, a hole at least one foot larger that the originally aNkm ate shall be excavated around the outside of the of the weld * « eapth of 3 feet below grade, and the well casing shall be cut att 6 V%tim above-the bottom of this excavation and removed. The grout wO ung s anal the well shall then be topped off and allowed to spill over MIt aft tt% 4rcavation and fill it for a thickness of one foot to form a "mush oso so ever the top of the cut casing. All groundwater displaced b to softo during grout installation shall be pumped out of the excavetiYtyn wW awftinerized for plop r sposal. Any wells located offsite requav mated access ents anior encroachment permits to be acted alonI EVEHD Well Destruction Permit Appli r @9 n Well destruction Option 1 is proposed far rs w -1, MW-2, and MW-3 since the wells are within City n as. Upon EHD review and approval a tifiity of Tracy will contract the qualified well drilling contra to e i I destruction work and that will include: • The drilling contra pr ��nd submit the EHD well destruction permits. All w� r trr*according to the San Joaquin County Well Standar e, er8 t 4 the approved permits. Page 2 of 3