Laserfiche WebLink
RECO UMMATlONS <br /> 1. pini?h aeratiaa,gof the,excavatod soil, and use this soil <br /> to back fl (appropriately compacted} the excavations to <br /> the surface. <br /> 2. P rc �; :he0,}x,o1iaite vaporrheitraction wells; one each <br /> t�`laugh tfis compacted Yuck fill of the tank excavation. <br /> the compacted back fill of the eastern pump island area <br /> S and the compacted back fill of the western pump island <br /> area, into native soil to the 44 foot depth, see <br /> Figures 7A and 7C. <br /> i �y <br /> W M� 1"TZ Ss� xftf fly t <br /> �ra� �r� dr�5w�`ll� ca�a�iimvrto �, ta� nt <br /> 3. 6� <br /> t <br /> sit l <br /> .�n <br /> 4rS; h�c� imt �a� a of tl�e si�E+ , se figure <br /> f <br /> 4. Perform a vapor source - pilot test- <br /> 5.' 5 rho r ..� * -- o e th® Yaest <br /> c xK � �V8por <br /> ® pump dispensing area has been demolished and cWern <br /> Mmus'giI` <br /> " enser an a 20- oot depths at and <br /> western dispensers. Immediately after the completion of <br /> excavating each excavation was sampled. Aeration of the excavated <br /> contaminated soil was completed and Walton Engineering used this <br /> material as compacted back fill for all of the excavations to <br /> surface. The eastern and western excavations were back filled <br /> with 1/4" clean pea gravel to the twelve foot depth, the middle <br /> dispenser excavation was back filled with engineered compacted <br /> native aerated soil. The tank excavation was over excavated to <br /> 4'f the 25 foot depth, sampled and then back filled with 1/4" pea <br /> gravel to the 12 foot depth and compacts native soil to the 2 <br /> q foo depth. <br /> astern Geo-Engineers (WEGE) installed three vapor recovery wells <br /> on site. Vapor recovery well EX was Installed within the <br /> overexcavated/back filled tank field, vapor )Lecovery well P1 was <br /> installed within the overexcavated/back fill of pump island 1 <br /> (eastern most island) , and vapor extraction well P3 was installed <br /> within the overexcavated/back fill of pump island 3 (western most <br /> island) . These wells were later manifolded with PVC pipe to a <br /> blower that exhausted into charcoal canisters for an day swells <br /> r test. Prior to the source test all ground water monitoring wells <br /> page 2 <br /> d <br />