1700 ENGLAND AVE 2016-01-01 MF Import

Z�rnng Properlp 9J-/2-10 Ercrell, IVnshiuglnn could occur. Base soil below the rockery should be continned as suitable for bearing support by a representative of the geotechnical engineer prior to the placement of any drainage rock or rockery. Bearing soil should be confirmed as � suitable for support of a maximum bearing value of 1500 ps£ The native sands " encountered below the topsoil and fill at this site should meet the requirement for support of the proposed rockery. If a two tiered rockery is used, the base bearing soil of the upper wall should be verified by a representative of the geotechnical engineer. The long term stability of the proposed rockery will in part be determined by the adequacy of the drainage on this site. GES recommends the following drainage controls: � A n�inimum twelve (12) to eighteen (18) inches of 4" to 6" crushed rock should be placed behind the rockery wall for drainage. If the fill or e�posed soil contains over 5% fines passing the #200 sieve - based on field observation of the soil, then we recommend that a high strength, , puncture resistant filter fabric be placed between the drainage rock and tlie embanlonent soil to prohibit the migration of fines into the drainage rock. The need for the filter fabric behind the wall sliould be determined by a representative of the geotechnical engineer at the time of conshuction. * A minimum four (4) inch perforated P.V.C. drain line should be placed along the Uase of embedment of each rockery wall, along tlie full length of die rockery. The line should be placed in a shallow ditch, approximately 12" deep, dug along the back side of the keyway excavation. The line should be laid in the base of the ditch, in such a manner as to providc positive drainage of collected water through the line towards an appropriate point of discharge away from the base of the rockery wall. The drain line should be bac�lled with a minimum 18" of washed �/S" 19 GES, Lic.