NCD/G/RENEW/010/2023	27th June 2023

To

Mr. Harshmani Rajput

Renew India

Sub :	Additional recommendations for Isolated / Strip footings and Raft foundations at different depth and results of chemical analysis of soil

Ref :	G(D) 4536A Conducting Geotechnical Investigation for the Proposed 375 MW ACME at Village Rampuriya, Tehsil Sahgada, District Jailsalmer, Rajasthan

Dear Sir,

This is in reference to the above mentioned subject and your email dated 22nd June 2023 regarding net safe bearing capacity at various depths for different widths of shallow foundations and also results of chemical analysis of water collected from the designated bore wells located outside the boundaries of the site, please find hereunder the same.

ISOLATED/ STRIP FOOTINGS

Net allowable bearing pressures for various widths of Isolated/Strip Footings for an allowable settlement of 50mm and net allowable bearing pressures for Raft foundations for an allowable settlement of 75mm

Depth (m) below EGL	Net A.B.P. (t/m2) for Isolated/ Strip footing for widths (m) of footings	Net A.B.P. (t/m2) for Raft foundation for width of foundation
1m	2m	3m	>4.5m
1.2	15	19	23	30
1.5	17	21	25	31
2	19	24	28	34
EGL : Existing Ground Level

RESULTS OF CHEMICAL ANALYSIS

Water table has not been encountered in the boreholes down to the depth of investigations. As per the instructions of the client's representative, water samples for chemical analysis have been collected from the bore wells located out side the site boundary near the borehole locations BH10 and BH13. The results of the chemical analysis conducted on water samples, for determining the presence of any harmful salts which can have adverse effects on construction, are as follows :

Borehole (BH)	pH value	Chloride Content (ppm)	Sulphate Content (ppm)
BH10	7.5	293	124
BH13	7.5	206	124
IS LIMITS
pH value	Not less than 6
Chloride content (ppm)	Maximum 500 ppm
Sulphate content (ppm)	Maximum 400 ppm

The above results indicate that the water collected from the bore wells will not have any aggressive effect on normal construction purposes.

We hope you find this in order.

Thanking you,

Yours sincerely,

Y.S. Rana

Executive Consultant